1938 ] 
North American Caddis Flies 
21 
Lectotype , male. — Chicago, Illinois, Osten Sacken. No. 
10965. 
This species is a very close relative of annvlicornis 
(Stephens), but may be readily separated from it on the 
basis of the aedeagus having two internal, large spines, and 
the clasper having a pedunculate sclerotized process, fig. 42. 
Dilutus has been incorrectly synonymized with annvlicornis; 
it is really distinct and seems to be the only name available 
for the species. 
Athripsodes flavus (Banks), 1904d, p. 212, pi. 2, fig. 4. 
(Leptocems) 
Lectotype , male. — Falls Church, Virginia. No. 11572. 
Lectoallotype, female. — Same data. 
The angulate basal process of the claspers illustrated in 
the original description serves to differentiate this species 
from its only close ally, ancylus (Vorhies). 
Athripsodes futilis (Banks), 1914, p. 264, figs. 44, 49. 
( Leptocems ) 
Lectotype , male. — Go Home Bay, Ontario, July 11, E. M. 
Walker. No. 11574. Lectoallotype , female. — Same data, 
but August 12. 
The male genitalia of this type agree with those of a male 
from Europe determined by Hagen as annvlicornis 
(Stephens) and answer in detail the illustrations of Mc- 
Lachlan. There seems no doubt but that fvtilis must be 
considered a synonym of annvlicornis. The chief diagnostic 
characters are in the sedeagus, which has only a single, large, 
internal spine, and the clasper, which has a short, digitate, 
sclerotized process, fig. 41. 
Athripsodes lugens (Hagen), 1861, p. 276. (Leptocems) 
Lectotype , male. — St. Lawrence River, Canada, 1859, 0. 
Sacken. No. 10966. Lectoallotype, female. — Same data. 
This species, also, is a synonym of annvlicornis. 
Athripsodes maculatus (Banks), 1898, p. 214. ( Leptocems ) 
Lectotype, female. — Washington, D. C. No. 11576. 
The type matches that of transversvs (Hagen) so per- 
fectly that there is no doubt that the two are the same 
species. Both type series were collected at Washington. 
