130 



ENTOMOLOGY. 



front bristly; anterior border of the mouth with strong, usually 



numerous vibrissas. Tibia' with spurs. Scatophaga xtercoraria Linn. 



Family Anthomyidae. —Thorax with a complete transverse suture. 



Fourth longitudinal vein straight or nearly so, hence the iirst pos- 



FIg. 152.— Onion fly. o, larva, natural size; b, the same, enlarged. 



terior cell is fully open. Tegula; ratber well developed*. PAorbia 

 ceparum Meig. (Fig. 152). Homalomyia scalaris (Fabr., Fig. 153) is 

 tbe privy-fly; the maggots of this and II. cunicularis are sometimes 

 discharged from tbe human intestines and urethra. 

 Family Muscidae. — Bristle of the antenna? entirely plumose 



(Musca) or pectinated (Sto- 

 moxys). Bodj r never slender; 

 thorax short; wings with the 

 first posterior cell only slightly 

 opened, or else closed al tbe 

 border of tbe wing; tegulse 

 large; legs stout. All the fore- 

 going families, with tbe three 

 following, are by many au- 

 thors placed in one great 

 family Muscidce; but, to accord 

 with our present imperfect 

 knowledge, Loew and others 

 have provisionally divided 

 them into a great number of 

 small families. Musca domestiea 

 Linn., tbe house-fly; Lucilia 



Fig. m.-Homalom»ia scalaris {¥). a, >"" r < / /" rf " ?abr. sometimes 

 larva, natural size; b. enlarged.— After lays its eggs in wounds in the 

 Curtis. skin of man, producing hard 



red fluctuating tumors; its maggot is railed the "screw-worm;" in 

 one case 800 of these maggots were found in or dropped from one 

 man's nose or nasal cavities, when' ii had destroyed tbe soft parts, 

 causing death. L. ccesar Linn., the blue-bottle fly; Calliphora ery- 

 throcephala Meig.. the meat-fly; Stomoxys calcitrant Linn, has a long, 

 slender, hard proboscis; it breeds in or about stables, and bites 

 horses and human beings. 



