Studies on the Chironomid Species Collected in Hokkaido in September, 2000

Collections of adult chironomids were conducted in September 2000 by Suzuki, with insect net at the side of Chubetsu River, and 10 species, including 5 new species, are recorded. In the collection with insect net at the side of Sorachi River, 5 species, including 2 new species, are recorded. In the collection with light trap and insect net at Ginzan, a total of 40 species, including 17 new species are also recorded. Although the island of Hokkaido is located in the northmost area of Japan and the climate is very cold in winter, the chironomid fauna are again found to be very rich

Studies on the Chironomid Midges of Tsushima and Iki Islands, Western Japan. : Part 2. Species of Orthocladiinae and Tanypodinae Collected on Tsushima.

Collection of the adult specimens of the insects family Chironomidae were carried out by Suzuki during the period from March 24 to 26, using light traps at 2 localities and by daytime sweeping with insect net at 18 localities on Tsushima Island. By microscopic examinations of 377 individually mounted slide specimens, 127 were found to be belonging to the subfamily Chironominae, and were classified into 48 species including 34 new species, and were described in our previous report (Sasa and Suzuki, 1999). The rest 250 specimens were classified into 56 species (including 31 new species) of the sub family Orthocladiinae, and 6 species (including 2 new species) of the sub family Tanypodinae. It was again demonstrated that this island is very rich in the chironomid fauna, and many new species are again added by the present studies. It is also shown that rather rare species so far collected only in central or eastern Japan are found in this remote island located in western Japan near the Asian continent

Studies on the Chironomid Midges of Tsushima and Iki Islands, Western Japan. : Part 3. The Chironomid Species Collected on Iki Island.

Collection of the specimens of the insect family Chironomidae were conducted by Suzuki during 3 day period from March 27, 1998, by sweeping with insect net at the side of streams and rivers, and also in night time in two towns. The specimens were preserved in 70% alcohol, and a part of the specimens screened under a stereomicroscope were individually mounted on slide glasses, the wings are in dry and the body is in gum-chloral medium after digested in 10% KOH and dissected by our standard method. A total of 147 male specimens were examined, and were classified into 37 species of the family Chironomidae. They included 11 species of at least the Holarctic distribution, 11 species so far recorded only from Japan, and 15 new species apparently indgenous to this island. The species recorded in common with the neighboring island of Tsushima this time were only 5

Studies on the Chironomid Collected on Goto Islands, Western Japan

Collections of chironomid midges were conducted by Suzuki at 3 localities on the Goto Islands situated west of Kyushu, at the side of Wani River on Nov. 28,1999, at the side of Ohgawara River on Nov. 29, and in the town of Fukue on Nov. 29. Samples of fallen leaves were collected in vinyl bags from bottom of the streams, kept in the laboratory under room temperature, and adult midges emerged from them were individually mounted on slides in gum-chloral medium with our standard method. A total of 29 adult male specimens collected with this method were examined, and were classified into 9 chironomid species, among which 3 are described as new species. Wild adult midges swarming in the air or resting in bushes were also collected during daytime with insect net at the same localities, screened under stereomicroscope for differentiating the species, and 95 adult males among them were mounted on slides. These were classified into 34 chironomid species, and 4 among them are described as new species. The number of species common to these samples collected with the two different methods were only 4, and none of the new species were collected with the two methods, showing that the simultaneous use of these methods are both significant. Of the total of 40 species collected this time, only 11 are considered as in common with those recorded from Europe, Americas and the mainland of Japan, 22 are those already recorded in other areas of Japan but not outside of this country, and 7 are described as new species this time

Studies on the Species of Family Chironomidae (Diptera) Collected on Minamidaito Island, Okinawa, South Japan. Part 1.

Collections of the specimens of the insect family Chironomidae were conducted on a small island of Minamidaito, Okinawa, southwestern Japan, during the period from March 26 to 29, 2001, with insect net in daytime and light traps after sunset and to next morning, and also by rearing adults in the laboratory from bottom sediments. The adult males were dissected and individually mounted on slide glasses in gum-chloral medium, and their species were identified. As the results, they are classified into 31 species including 16 new species. It is again a surprising fact that so many the species of this family, including new species, were collected from such a small island

Stuidies on the Chironomid Species Collected on Ishigaki and Iriomote Islands, Southwestern Japan

Collections of adult chironomid midges were carried out by Suzuki at 3 localities on Ishigaki Island for 2 days on June 30 and July 1, and at 2 localities on Iriomote Island on July 3, 1999, by sweeping with insect net during daytime and also by using a light trap during night time. Samples of larval and pupal chironomids in rivers and streams were also collected, and the adult midges were reared in the laboratory. The specimens were mounted individually on slides with gum-chloral medium and sent to Sasa for species identification and descriptions. As the results, 21 adult male specimens were obtained from Ishigaki, and they were classified into 12 species, among which only 2 were the previously described species from Europe and also from the mainland of Japan, and other 10 were new species. From Iriomote Island, 47 specimens were obtained and were classified into 21 species, and only 1 among them were in common with the Oriental Region and the mainland of Japan, and the rest 20 were new species. Only 1 species was in common to both islands. These 32 species are classified into 19 genea, and 5 among them are described as new genera, and one was a new genus to Japan

Studies on the Chironomid Midges Collected on Yakushima Island, Southwestern Japan

Collections of adult chironomids were carried out on Yakushima, a high mountainous island south of Kyushu, for six days in March 1999, with insect net during daytime and the side of streams and pools, and with light traps during night time in the towns of Miyanoura and Anbou. The specimens collected were preserved in 70% alcohol, brought to the laboratory in Nagasaki University, screened under a stereomicroscope and a part of them, a total of 402 males were individually mounted on slides in gum-chloral solution. They were mailed to Sasa\u27s laboratory and were classified into species under a compound microscope. As the reults, they were separated into a total of 79 species, including 43 new species, among which 24 (including 10 new species) were identified as belonging to the subfamiy Chironominae, 52 (including 33 new species) to the subfamily Orthocladiinae, and 3 to the subfamily Tanypodinae, and are described in this paper

Studies on the Chironomid Species Collected at Five Localities in Hokkaido in September, 1998 (Diptera, Chironomidae)

Collections of adults of the insect family Chironomidae were conducted in Hokkaido, the northern island of Japan, in September 1998. Collection was carried out by sweeping with insect net in the campus of Hokkaido University in the city of Sapporo, and 17 specimens were individually mounted on slides, and were identified as belonging to 7 species. Collections were conducted also at 4 localities in the Hidaka Mountain areas with light trap or by sweeping with insect nets, and a total of 25 species, including 8 new species, are recorded in this report. The new species are names as Micropsectra hidakabecea, Eurycnemus hidakacedeus, Rheocricotopus hidakadeeus, Bisaiyusurika hidakaefea, Limnophyes hidakafegeus, Parakiefferiella hidakagehea, Parakiefferiella hidakaheia, and Smittia hidakaijea

Studies on the Chironomid Midges Collected in Hokkaido and Northern Honshu

Collections of adult chironomids were conducted by H. Suzuki at 5 localities in southwestern Hokkaido in September, 1997, by M. Sasa in the Aizu area, Fukushima, in October, 1997, and by K. Kamimura in Aomori Prefecture in August 1997, by using light traps at night or by sweeping with insect net during daytime. The species identification was made after the specimens were individually mounted on slides in gum-chloral medium. In Hokkaido, 9 species were identified with specimens collected in the campus of Hokkaido University, 16 species including 5 new species at Ginzan, 14 species including 5 new species at Misumai, 8 species including 2 new species at Kyogoku, and 4 species at the foot of Mount Tarumae. In the Aizu area, 2 species were identified with specimens collected on fluorescent lamps at Koriyama, 4 species, including a species belonging to Protanypus, a genus new to Japan, were collected on the shore of Lake Inawashiro and another 4 species, including a new species of a new subgenus, Pseudosmittia (Hibarasmittia) hibaraundecima, were collected on the shore of Lake Hibara. In Aomori Prefecture, 2 species, including a new species of genus Macropelopia, at Sukayu, 2 species at Asamushi, and 3 species at Fukaura, including a new species of genus Tanytarsus, were identified

Studies on the Chironomid Midges of Tsushima and Iki Islands, Western Japan : Part 1. Species of Chironominae Collected on Tsushima

Collections of adult chironomid midges using light traps in night time and by sweeping with insect net in daytime were carried out by Suzuki during 3 days period from 24 to 26 March, 1998, on Tsushima Island, located on the channel between the Korean Peninsula and Kyushu, Japan. The specimens were preserved in 70% alcohol, screened under stereomicroscope in the laboratory, and a part of them were dissected and mounted individually on slides in gum-chloral medium. A total of 512 adult male specimens were examined this time and 253 among them were identified as belonging to the subfamily Chironomidae, and the rest 259 were those belonging to other subfamilies. The former group was further studied in details, and identified as belonging to 48 spepcies, among which 13 are the species already recorded from Japan, one species, Micropsectra junci (Meigen, 1818) is a new record to Japan, and the rest 34 are recorded in this paper as new species