NO. 3569 SOLDIER FLY LARVAE — McFADDEN 33 



SuBFAMiLL\L CHARACTERS. — As given in key to subfamilies. 



Habitat of larvae. — Stratiomyine larvae have been collected 

 from almost every conceivable type of aquatic environment, ranging 

 from hot springs and fast-flowing brooks to ocean shores. Although 

 larvae in the genus Stratiomys are at home in water depths of several 

 feet, larvae in most of the remaining genera prefer to remain hidden 

 in naturally occurring vegetation along the shore or margin of the 

 water. Quite frequently these larvae are found in and under shore 

 debris such as boards, logs, cans, cardboard boxes, weeds, and other 

 types of decaying organic matter. 



Key to Genera of Stratiomyinae 



1. Seventh abdominal segment of larva with curved sclerotized hooks on venter 



(fig. 122) 5 



Seventh abdominal segment without curved sclerotized hooks on venter . 2 



2. Antenna located at apex of ocular lobe (fig. 126) 4 



Antenna not located at apex of ocular lobe . Caloparyphus James (in part) 



3. Integument of larva covered with minute, peltate scales (fig. 91). 



Odontomyia Meigen, subgenus Catasina 

 Integument lacking peltate scales Stratiomys Geoffroy 



4. Sclerotized hooks present on venter of each of the first 7 abdominal segments, 



those on the seventh larger than the others .... Aochletus Osten Sacken 



Sclerotized hooks absent from each of the first 6 segments; those on the 



seventh present 5 



5. Hydrofuge setae on last abdominal segment attaching to 2-lobed structures 



on lower lip of spiracular cleft (fig. 88) ; prothoracic spriacles located at 



anterior corner of that segment Myxosargus Brauer 



Hydrofuge setae attaching to straight edge of lower lip, lobed structures 

 absent; prothoracic spiracle not located in anterior corner of prothorax . . 6 



6. Antenna dorsal, not at apex of ocular lobe; prothoracic spiracles elevated or 



stalked 7 



Antenna at apex of ocular lobe; prothoracic spiracles neither elevated nor 

 stalked 8 



7. Apical segment with lateral margin straight; distance from antenna to eye 



prominence greater than twice length of antenna. 



Caloparyphus James (in part) 

 Lateral margin of apical segment tapering basally toward median line ; distance 

 from antenna to eye prominence approximately equal to length of an- 

 tenna Euparyphus Gerstaecker 



8. Venter of sixth and seventh abdominal segments with sclerotized hooks . . 9 

 Venter of only seventh abdominal segment with sclerotized hooks. 



Odontomyia Meigen, subgenus Odontomyiina 



9. Body segments with broad dorsal vittae or body segments with fine white 



pubescence or multiple hooks. 



Odontomyia Meigen, subgenus Odontomyia 

 Without the above combination of characters . . . Hedriodiscus Enderlein 



221-533—67 3 



