VOL. 121 



36 PROCEEDINGS OF THE NATIONAL MUSEUM 



Of the 3 species listed by James (pers. comm.) for this taxon, larvae 

 have been coUected for the followmg 2: A. cinctus Osten Sacken 

 and A. brevicornis Loew. 



Generic characters.— As given in key to genera. 



Key to Species of Aochletus Osten Sacken 



Prothoracic spiracles distinctly stalked cinctus Osten Sacken 



Prothoracic spiracles almost flush with integument brevicornis Loew 



Aochletus cinctus Osten Sacken, 1866 



DESCRiPTiON.-Puparium: length 9.5-10.5 mm, mean 10.0 mm; 

 width 2.7-2.8 mm, mean 2.73 mm. Other characters as given m 

 key to species. 



Biology.— No data are available for this species. 



Material examined.— California: Topanga Canyon, Los Angeles 

 Coimty, May 10, 1953, 3 puparia, WSU; Sespe Creek, Ventura 

 County, June 15, 1948, W. W. Wu-th, 1 puparium, USNM. 



Aochletus brevicornis Loew, 1866 



Figures 96, 97, 101 

 Description.— Instar no. ?: length 4.5-5.3 mm, mean 4.93 mm; 

 width 1.3-1.7 mm, mean 1.50 mm; other characters as given ha key to 



species. 



Biology.— Larvae have been collected from springs m YeUowstone 

 National Park. No mention is given regardmg the type of sprmg 

 other than the location. 



Material examined.— Wyoming: Mammoth, Yellowstone Na- 

 tional Park, Jan. 25, 1956, J. R. Murphy, 3 early instar larave from 

 a cavern spring, WSU; Mammoth, YeUowstone National Park, 

 June 20, 1956, J. R. Miu-phy, 6 larvae from hillside springs, WSU. 



Genus Caloparyphus James, 1939 



On the basis of male genitalia, both James (pers. comm.) and Quist 

 (Thesis) consider Caloparyphus to merit generic status.^ The larvae, 

 however, do not seem to corroborate this. In fact, it is rather diffi- 

 cidt to distinguish between the larvae of Caloparyphus and those of 

 Euparyphus (see key to genera, p. 33). This seems to suggest that 

 perhaps Caloparyphus should be returned to its former status as a 

 subgenus of Euparyphus. 



James (pers. comm.) lists 11 species for this genus in North America. 

 Associated larvae or puparia have been collected for 5 species, m- 

 cluding 1 unidentified species. 



Generic characters.— As given in key to genera. 



