NEOTROPICAL CADDIS FLIES I — FLINT 463 



Atopsyche species 3 



This larva is very similar to that assigned to alconura, but differs in 

 lacking the ventral dark marks on the head. 



Larva. — ^Length 10 mm. Coloration as in alconura, except central 

 stripe on frontocl3rpeus narrower and no dark marks ventrally. 



Material. — Venezuela: Rio Cobre of the Catatumbo system be- 

 low La Grita, Mar. 31, 1942, L. P. Schultz, 2 larvae (USNM). 



Hydrobiosinae genus A 



Figure 4 



In the material from Ecuador are two hydrobiosine larvae that differ 

 in many structural characteristics from the larvae of Atopsyche. The 

 most important differences are the fusion of the pronotal halves, the 

 reduction of the prosternite to a minute sclerite, and the disappearance 

 of a segment in the forelegs. 



No genus other than Atopsyche is knowm to occur in Ecuador, so I 

 can not even speculate as to the generic placement of these larvae. 



Larva. — Length 6 mm. Head yellowish, muscle scars darker, 

 posterior margin black (fig, 4,a), Labrum as in Atopsyche. Maxilla 

 about the same, except lateral part of stipes almost completely mem- 

 branous except at seta and mesal part strongly sclerotized toward base 

 and closely united with cardo. Labium as in Atopsyche, except dor- 

 sally where mesal strap lacks teeth and hypopharyngeal rods with only 

 5 or 6 teeth on strongly angulate apical portion. Mandibles with only 

 a single dorsal subapical tooth (fig. 4,6). Pronotum yellowish, pos- 

 terior and lateral margins black; lacking mesal suture (fig. 4,a). Pro- 

 sternum very small (fig. 4:,d), in width only one-fifth of the distance 

 between legs. Forelegs chelicerate, but femur not twisted; femoral 

 process much narrower than that of Atopsyche; apparently tibia and 

 tarsus fused (at least only 1 segment obviously present); claw extend- 

 ing beyond tip of femoral process (fig. 4,c). Abdomen generally as in 

 Atopsyche. Anal proleg lacking baso ventral spine; claw sharply curved 

 ventrad, basal segment with a broad curved spine arising apicoven- 

 trally and a normal seta arising laterally at its base (fig. 4,e). 



Material, — Ecuador: Stream 5 miles south of Antisana, 13,500 ft., 

 Apr. 28, 1958, R. W. Hodges, 1 larva; stream 11 miles west of Pujili, 

 12,500 ft., Mar. 15, 1958, R, W. Hodges, 1 larva. 



Family Glossosomatidae 



The subfamily Glossosomatinae is present in the New World only 

 in the Nearctic region; the Protoptilinae, also widely distributed in 

 North America, is the only subfamily present in the Neotropics. 



