440 



Wirth and Stone: Diptera 



Fig. 14:45. Stratiomyidae, larvae, 

 c/ncfa (01 i v.); 



>, Hermione; b, Nemotelus; c, Euparyphus; d, Eulalia 

 e, Slratiomys (Johannsen, 1935). 





— Posterior spiracular chamber situated at apex of last 

 segment (fig. 14:45a), with fringe of long hairs; last 

 segment without long marginal hairs . . Hermione Meigen 



5. Last segment very elongate, more than 3 times as long 

 as basal width (fig. 14:45e); caudal margin of next to 

 last segment without ventral hooks; antenna about 3 

 times as long as its diameter Stratiomys Geoffroy 



— Last segment shorter, at most 3 times as long as basal 

 width (fig. 14:450"); caudal margin of next to last seg- 

 ment with 2-4 strong, curved, ventral hooks; antenna 

 about 6 times as long as its diameter 



Hedriodiscus Enderlein, Eulalia Meigen 



The immature stages of the remaining genera named 

 in the key to adults are not known. 



California Species of Aquatic Stratiomyidae 



Subfamily AD0X0MYIINAE 



Genus Nemotelus Geoffroy 



(Figs. 14:44c; 14:456) 



Although the larvae of none of the North American 

 species are known, those of several European species 

 have been described (see Johannsen, 1935). Brues 

 (1928) figured an unnamed species of this genus which 

 he took in a hot spring in Mount Lassen National 

 Park. There are numerous North American species 

 which badly need revision as Melander's (1903) key 

 is out of date. 



California species: 



albomarginatus James 1936. 

 arator Me lander 1903. 

 canadensis Loew 1863. 

 glaber Loew 1872. 

 lambda James 1933. 

 rufoabdominalis Cole 1923. 

 trinotatus Melander 1903. 

 tristis Bigot 1887. 

 unicolor Loew 1863. 



California 



Santa Clara, San Diego 



Santa Clara, Los Angeles 



Siskiyou, Los Angeles 



California 



Siverside County 



California 



Santa Clara County 



California 



Genus Euparyphus Gerstaecker 



The genus Euparyphus reaches its greatest develop- 

 ment in the southwestern United States, with the 

 genus Hermione replacing it in large part in the 

 eastern states and in Europe. The larvae (fig. 14:45c) 

 are usually found in wet moss and algae in and beside 

 small streams, although Brues (1928) has found the 

 larvae of an undetermined species in a hot spring at 

 Mount Lassen National Park. Lenz (1923) has de- 

 scribed the larvae of several European species as 

 Oxycera {.^Hermione} which on the basis of both larval 

 and adult characters probably belong to Euparyphus. 

 Johannsen (1922) has described larvae of several 

 eastern species of both genera. 

 California species: 



ampins Coquillett 1902. 

 apicalis Coquillett 1902. 

 crotchii (Osten Sacken) 1877. 

 crucigerous Coquillett 1902. 

 flaviventris James 1936. 

 lagunae Cole 19 12. (fig. 14:44/) 



San Diego County 



Siskiyou, Orange 



Northern and Central Calif. 



Modoc, Plumas 



Modoc County; Lake Tahoe 



Orange County 



