Lutz, Frank Eugene, 1879-1943.

Silvestri, Filippo, 1873-1949.

American Museum of Natural History Scientific Publications

AMERICAN MUSEUM NOVITATESPublished byNumber 920 THE AmERICAN MUSEUM OF NATURAL HISTORY May 3, 1937New York CityDESCRIPTION OF A NEW SPECIES OF SYMPHYLURINUS(INSECTA, DICILLURA) FROM CENTRAL AMERICABY FILIPPO SILVESTRIIn a collection of terrestrial small Arthropoda (called by me " micro-genton") made in 1930 by Dr. Frank E. Lutz at Barro Colorado (Pan-ama), I have found a specimen of Symphylurinus which is very peculiarespecially in the structure of the apical setae of the subcoxal appendicesof the first urosternum and which is being described here as a new species.I note that Symphylurinus has a number of representatives in SouthAmerica and -a few in Africa and Asia.Symphylurinus lutzi, new speciesFigures 1 to 3Corpus cremeum, caput supra setis brevibus integris parce numeiosis et non-nullis minus brevibus, postantennalibus duabus / 78 longis subintegris, setis et sen-sillis consuetis vide figure 2, A, palpo labiali fere 3/4 longiore quam latiore.Thorax.-Pronotum macrochaetis 4 + 4 sat longis (lateralibus u 100 longis),bar-bulis 2-3 instructis, superficie cetera setis paucioribus brevibus et brevioribus;mesonotum macrochaetis 2 + 2 subanticis, macrochaetis 2 + 2 transverse submedi-anis, macrochaeta laterali subpostica et macrochaetis 3 + 3 posticis barbulis 1-2 auctis,postica laterali u 130 longa, cetera superficie setis paucioribus brevioribus et brevi-bus; metanotum macrochaetis 1 + 1 et 3 + 3 posticis, cetero mesonoto simile.Sterna praesternis, acetabuli margine antico et furcoster setis duabus anticis,duabus inter pedes et duabus posticis parum longis et barbulatis, setis ceteris breviori-bus et brevibus et integris.Pedes sat setosi, primi paris tibiae apicis strigile setis spatuliformitus 4, paristertii trocanthero macrochaetis inferis brevibus barbulatis duabus, femore macro-chaetis superis 4 parum longis et inferis submediana et duabus apicalibus, tibiamacrochaeta ventrali brevi praemediana, calearibus apicalibus simplicibus, tarsosetis brevioribus magis numerosis et setis duabus superis distalibus quam ceteraealiquantum longioribus, praetarsi unguibus modice arcuatis, ungue postico quam anti-cus fere l/3 longiore.Abdomen.-Tergitum 1"" macrochaetis 1 + 1 subanticis submedianis et 1 + 1posticis submedianis, 2um 1 + 1 subanticis et 2 + 2 posticis, 3Wm 1 + 1 subanticiset 3 + 3 posticis, tergitum 4um ad 7U" macrochaetis anticis 3 + 3, laterali utrimquesinguhi et posticis 4 + 4, omnibus barbulis 3-5 et lateralibus posticis ju 120 longis,ceteris quam dietae parum brevioribus, tergitum 8um macrochaetis posticis 4 + 4,90' 3 + 3, 10""mmacrochaeta subpostica mediana sat longa quam setae submedianaemarginales fere 3/8 longiore, setis marginalibus ceteris quam submedianae parumbrevioribus.AMERICAN MUSEUM NOVITATESUrosternum primum macrochaetis 7 + 7, quarum 3 + 3 subanticae, sat longis etbarbulis nonnullis auctis, appendicibus subcoxalibus elongatis subcylindraceis quamstili 1/3 longioribus et setis duabus posticis longis clavatis instructis, stilis subconicis,u 65 longis setis integris instructis; urosterna 2-7 macrochaetis 6 + 6, quarum 2 + 2anticae, stilis elongatis; urosternum 8U" macrochaetis posticis 1 + 1, 9um macro-chaetis 2 + 2, 10um macrochaetis submedianis subposticis et submedianis-sub-lateralibus posticis longis, robustis subaequalibus.Cerci 11-articulati articulo secundo a primo subindistincto, tertio a quartoparum magis distincto, ceteris distinctis, setis vide figure 3, G.a~~~~~~~NlXin"~~~~~~~~~~~~~~~~~~~iFig. I Fig. 2Fig. 1. Symphylurinus lutzi: animalculum pronum (ampliatum).Fig. 2. A, Antenna dextera prona; B, caput et thorax supina; C, pesparistertii; D, eiusdem tibiae apex, tarsus et praetarsus magis ampliati; E, tarsi apex etpraetarsus multo ampliati.2 [No. 9201937] NEW SYMPHYLURINUS FROM CENTRAL AMERICA 3Long. corporis mm. 2, lat. capitis 0. 39, long. antenn. 0. 65, long. pedum paristertii 0. 90, cercorum 0. 58.Habitat.-Exemplum descriptum ad Barro Colorado (Panama) clar. Dr. FrankE. Lutz, cui species dicata est, legit.Observatio.-Species haec ad S. grassii Silvestri proxima sed macro-chaetis dorsualibus aliquantum longioribus, parum magis barbulatis,urosterni primi processibus subcoxalibus longioribus et setis duabusposticis longis clavatis instructis et urotergiti decimi macrochaeta inedi-ana quam submedianae fere 3/8 longiore saltem distinguenda est; culmmares adulti noti sint, characteres ceteri inquirendi sunt.Fig. 3. A, Abdominis pars postica prona; B, urosterni primi dimidia pars; C,eiusdem urosterni appendicis subcoxalis apex magis ampliatus; D, urosterni quintidimidia pars; E, abdominis pars postica rupina; F, laminae supera et infera aper-turae genitalis; G, cerci apex.

New Symphylurinus from Central America

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