NEOTROPICAL CADDIS FLIES I — FLINT 455 



Key to Neotropical Genera of Hydrobiosinae 



1. R3 of forewing apparently arising from R4 rather than R2+3. 



Neoatopsyche Schmid 

 R3 arising from R2+3 2 



2. R2+3 of forewing forked at r or s, cell R2 long 3 



R2+3 forked nearer margin, cell R2 short 9 



3. R4+5 of forewing forked near wing margin and pedicel longer than either 



branch Metachorema Schmid 



R4+5 forked slightly basad of fork of R2+3 4 



4. Forewing with crossvein m present 5 



Forewing lacking m 8 



5. Two m-cu crossveins present in forewing Rheochorema Schmid 



Only 1 ra-cu crossvein 6 



6. R2+3 of hindwing unforked Microchorema Schmid 



R2+3 of hindwing forked 7 



7. R2+3 of hindwing forked at r, m-cu arcuate .... Aiistralobiosis Schmid 

 R2+3 forked beyond r, m-cu straight Clavichorema Schmid 



8. In forewings, crossvein s present Neochorema Schmid 



Crossvein s absent Iguazu Ross 



9. Crossvein m present in forewing Pseudoradema Schmid 



Crossvein m absent 10 



10. R4+5 unforked in hindwing 11 



R4+6 forked in hindwing 12 



11. M3+4 of forewing bowed sharply toward Cuj; M4 and Cuu close together. 



Atop.syche Banks 

 M3+4 not bowed sharply toward Cui Dolochorema Banks 



12. R2+3 of hindwing apparently arising from R4 13 



R2+3 arising independentlj' from Rs 15 



13. R, Rs, M, and Cu in forewing bearing double rows of hairs, in male at least. 



Stenochorema Schmid 

 These veins not abnormally hairy 14 



14. Crossvein s present in forewings Caillonia Ross 



Crossvein s absent Parachorema Schmid 



15. Crossvein r lacking in forewing, R4+5 about half length of R2+3 in hindwings. 



Australochorema Schmid 

 Crossvein r present, R4+5 and R2+3 of equal length. 



Neopsilochorema Schmid 



Genus Atopsyche Banks 



Atopsyche Banks, Tran. Amer. Ent. Soc, vol. 32, p. 17, 1905. 



Two additional species of this genus, discovered in material from 

 South America, are described below. I have also studied larvae, 

 representing four species, that belong to this genus. Although the 

 larva of only one species is tentatively correlated with the adult, the 

 larvae of all four species are described in order to indicate the type of 

 interspecific variation likely to be found in the genus. A rather com- 

 plete description is given of the larva and pupa of one species so that 

 material may be provided that may be useful in phylogcnetic work. 



