I recently collected immature stages of the aquatic dipteran genus Maruina from a spring-run located in the Big Bend region of western Texas

Bowles, David E.

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38  Volume  13,  No.  1-2,  March-June,  1999,  INSECTA MUNDI The occurrence of the genus Maruina (Diptera: Psychodidae) in Texas DavidE. Bowles Texas Parks  and  WilcllifeDeparlment RiverStudiesFrogram P.O. Box 1685 San  Marcos, TX 78667 I recently collected immature stages of  the aquatic dipteran genus Maruina  from a spring-run located in  the Big Bend  region of  western  Texas. The spring-run, OJ ito Adentro, is located in the Bofecillos Canyon Drainage, Presidio County, TexasatN29°29'27.7", W104° 3'45.6" (measured with a Garmin GPS40 global positioning system). I collected specimens from the wetted  vertical surface of a large boulder in  the stream  channel. A thinfilm of  water  flowed over this boulder creating  a madicolous habitat. The habitat  was thoroughly described in  Sites and Bowles (1995) and Bowles et  al. (1999). No adults were collected. I determined the  identity of  the  larvae and  pupae as Maruina lanceolata (Kincaid), using the key of  Hogue (1973). Maruina lanceolata is widely distributed in  the western U.S., with  records from California, New Mexico and  Washington (Quate & Wirth, 1951). Other  collections have  been  made  in  western Canada (Downes, 1972) and Baja California, Mexico (Hogue, 1973). However, Quate & Wirth (1951) suggested that, given the broad  range of observed variation among populations, M.lanceolata might be a species-complex in  western  NorthAmerica or possibly several subspecies distributed over its broad geographic range. Two additional species, Maruina pennalci (Vaillant), and  Maruina  boulderina (Vaillant) are known from Colorado (Vaillant, 1963; Hogue, 1973). Although my  collections ofMaruina  in  Texas were taken from the same approximate latitude (29°) as collections made  by Hogue (1973) in  Baja, California (30° -35°), they represent  the  easternmost  known distributional record for this species. Ojito Adentro, has yielded several other records of  aquatic insects (Sites and  Bowles, 1995; Abbott, 1996; Bowles et  al., 1999), suggesting that  the distributions of  a significant component of  the insect  fauna from the southwestern  U.S. and  Mexico may extend into the Big Bend Region of  Texas. The relatively broad seasonal distribution oflarvae and  pupae, and  the  occurrence of at least  two larvalinstarsinNovemberindicatesM.lanceolata has an extended emergence period in Ojito Adentro. Specimens that  I examined are deposited in  the  TexasA&M University Entomology Collection, College Station, Texas. I thank Drs. Peter Adler and Greg Courtney for reviewing this note. Material  examined: USA, Texas, Presidio County, Big Bend  Ranch State  Park, OjitoAdentro, 29 Dec 1995, 3 larvae; same data, but  29 Apr 1996, 5 larvae, 1 pupa; same data, but  29 Nov 1997, 32 larvae, 4 pupae. References Abbott, J. C.  1996.  New and interesting records from Texas and Oklahoma.  Argia, 8: 14-15. Bowles, D.  E.,  S.  C.  Harris, and J. Bueno-Soria. 1999.  An assessment of new world Stactobiini (Trichoptera: Hydroptilidae: Hydroptilinae) lar-vae with new larval descriptions of  Ali  sot ric hi  a, Mejicanotrichia,  and  Scelobotrichia.  In,  H. Malicky and P. Chantaramongkol [eds.], Proc. 9th Int. Sym. Trichoptera, Chiang Mai, Thai-land. Downes, J. A.  1972.  Canadian records of Phlebot-omous vexator, Trichomyia nuda, and Maruina lanceolata (Diptera: Psychodidae).  Canadian Entomologist, 104: 1135-1136. Hogue, C.  L.  1973.  A  taxonomic review of the genus Maruina  (Diptera:  Psychodidae).  Los Angeles County Natural History Museum Sci-ence Bulletin, 17:1-69. Quate, L. W., and W. W. Wirth.  1951. A taxonomic revision of the genus Maruina (Diptera:  Psy-chodidae). W asmann Journal of  Biology, 9: 151-166. Sites, R.  W., and D. E.  Bowles.  1995.  Ambrysus hungerfordi  hungerfordi  (Hemiptera:  Nau-coridae) occurrence in the United States. Jour-nalofthe Kansas Entomological Soceity, 68:476-478. Vaillant, F.  1963.  Les Maruina d'Amerique du Nord.  (Dipt.  Psychodidae).  Bulletin de la Societe Entomologique de France, 68:71-91. 

A taxonomic review of the genus Maruina (Diptera:

A taxonomic revision of the genus Maruina (Diptera: Psychodidae).

Ambrysus hungerfordi hungerfordi (Hemiptera: Naucoridae) occurrence in the United States. Journalofthe Kansas Entomological Soceity,

An assessment of new world Stactobiini (Trichoptera: Hydroptilidae: Hydroptilinae) larvae with new larval descriptions of Ali sot

Canadian records of Phlebotomous vexator, Trichomyia nuda, and Maruina lanceolata (Diptera: Psychodidae).

Les Maruina d'Amerique du Nord.

New and interesting records from Texas and Oklahoma.

The occurrence of the genus Maruina (Diptera: Psychodidae) in Texas

The occurrence of the genus Maruina (Diptera: Psychodidae) in Texas

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