1938 ] 
North American Caddis Flies 
17 
The long, curved spur at the end of the lateral process of 
the sedeagus, combined with the short, upright and notched 
apical processes of the tenth tergite, set off this species from 
its close relatives, fig. 34. 
Hydropsyche depravata Hagen, 1861, p. 290. 
Allotype, male. — Georgia, 1860, Gerhard. 
This specimen agrees perfectly in color, habitus and labels 
with the female type of the species. There is no doubt that 
it is the same species. The genitalia are quite distinct, fig. 31, 
and in a large number of points suggest that this species and 
its close allies form the most primitive stock in the genus. 
Hydropsyche divisa Banks. — see Smicridea divisa (Banks) 
Hydropsyche gracilis Banks. — see Cheumatopsyche gracilis 
(Banks) 
Hydropsyche grandis Banks. — see Arctopsyche grandis 
(Banks) 
Hydropsyche hageni Banks, 1905b, p. 14, figs. 6, 10, 12. 
Lectotype, male. — Travilah, Maryland, July. No. 11996. 
The greatly lengthened and flattened apico-lateral plates 
of the sedeagus set the species off from others of the 
scalaris group easily, fig. 22. 
Hydropsyche incommoda Hagen, 1861, p. 290. 
Lectotype, male. — Georgia, Winthem. No. 11028. 
This species is a member of the scalaris group. The 
structures at the apex of the sedeagus are shown in fig. 29. 
Hydropsyche kansensis Banks. — see Potomyia kansensis 
(Banks) 
Hydropsyche minuscula Banks. — see Cheumatopsyche mi- 
nuscula (Banks) 
Hydropsyche novamexicana Banks, 1904a, p. 110, fig. 12. 
Lectotype, male. — Roswell, New Mexico, August 22, 
Cockerell. No. 11505. 
This species is a synonym of occidentalis Banks. 
Hydropsyche occidentalis Banks, 1900a, p. 258. 
Lectotype, male. — Pullman, Washington, August 7, 1898. 
No. 11500. 
This species is closest to scalaris and venularis, but differs 
