128 



ENTOMOLOGY. 



Illinois; E. californica Pack, in Clear Lake, Cal.; while E. gradlis 

 is abundant in Great Salt Lake, Utah. The larvae and pupa-cases of 

 E. californica, which inhabits Mono Lake, are eaten in large quanti- 

 ties by the Indians. 



Family Diopsidae. Eyes situated on long lateral projections. 

 Spliyracephala brevicornis Say. 



Family Piophilidae. Front with some small bristles above only; 

 clypeus rudimentary, legs rather stout. Piophila casei Linn. 



Family Sepsidae. Head rounded; front bristly; border of the 

 mouth more or less hairy, the' foremost hair often imitating a 

 vibrissa; clypeus rudimentary; proboscis short; palpi exceedingly 

 small or wanting Abdomen tapering towards the base. Middle 

 tibiae with distinct spurs; claws and pulvilli small; venation of the 

 wings complete; the auxiliary vein distinctly separated from the 

 first longitudinal vein; the two posterior basal cells rather large. 

 Sepsis simiiis Macquart. 



Family Opomyzidae. Opomyza signicosta Walk. 



Family Heteroneuridae. Front with long bristles; 

 developed; palpi broad and proportionately large; 

 Heteroneura albimana JMeigeu. 



Family Phycodromidae. Thorax and a'bdornen flat. 

 Fallen. Europe and North America. 



Family Sapromyzidae. Venation complete; auxiliary vein of the 

 usual structure, frequently very near the first longitudinal vein; 

 costa of the wings without bristles or a marginal spine; longitudinal 

 veins without peculiar hairs; posterior basal cells small. Front with 

 a single row of bristles on each side; no vibrissse on the border of 

 the mouth; clypeus rather rudimentary. Only the middle tibiae 



clypeus not 

 legs slender. 



Ccelopa frigida 



FIG. 150. Louchaea. a, larva ; b, pupa-case. 



have terminal spurs; all the tibiae with a small erect bristle on the 

 outer side before the end. Ovipositor of the female not horny. 

 Sapromyza vulgaris Fitch. 



Family Lonchaeidse. Like the Sapromyzidae, but the female has a 

 horny, 3- jointed ovipositor. The species bore in the bark of wil- 

 lows, etc. Lonchaa polita Say. 



Family Trypetidse. Venation complete; the end of the auxiliary 

 vein runs steeply to the border of the wing and becomes obsolete; 

 first longitudinal vein always with bristles, the third frequently, the 

 fifth sometimes; two posterior basal cells rather large, the hindmost 



