ORDER />W J: 



1 2fi 



l'ainilvHippoboscidae The sheep-tick and I uow n by 



the Battened head and body, and by the stout pro TUt.- 



Fig. 144. -Hat tick. Fin. 145. — Sbeep-tick ami pnparium. 



sheep-tick, Melophagus ■ s Linn., is often very troublesome . to 

 ahee] I Linn.) is winged, with 



claws. 



der .'. Cyclorhapha. — This name has been given 

 to this subdivision of flies from the fact that the perl 

 flies escape from the pupa-case through a circular ori 

 The word "maggot" is especially applicable to the larva 

 of this group, since they are worm like, whitish, without a 

 definite head, and are footless. When about to pu] 

 their bodies Bhrink into a barrel-shaped form, and the skin, 

 instead of being casl off, forms a dense case for the pn I 

 tion of the Boft-bodied, white pupa within. 



The types of the sub-order are such in.-. the hoi 



and flesh-flies, as well as the Syrphus flies. The body is 

 short and thick, the abdomen conical and composed of 

 from five to eighl segments. 



The arrangement of the families here adopted is that 

 of Osten Sacken'a u < latalogue of North American Pip; 



md edition, 1878), while the characto the families 



are taken from Loew's "Monographs of the 

 North America.'* Part I., though the order of 

 has been reversed, the enumeration beginning with the 

 ii.west and ending with the highest family. 

 the smaller, unimportant families are :: only by 



name. 



