CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 255 



BB. Facial grooves far apart; squamaj large, ovipositor elongate. — Ily- 

 poderma (Fig. 161). 

 C. Prothoracic band of yellow hairs, mesothoracic band of brownish 

 black hairs; media 3 sinuate; legs black with black hair; tips of 

 hind tibiae and tarsi yellowish-brown. — H. bovls. 

 CC. Thoracic band of hairs brownish; media 3 rounded; tibiae and 

 tarsi yellow; femora black.: — H. lineatum. 



Fig. 161. — Venation 



I, Hypoderma linealum; 2, 



Warble Flies 



The Striped Warble Fly {Hypoderma lineatum Villers). — (Consult 

 Bull. 5, Div. Ent., U. S. Dept. Agr.; Bull. 48, Minn. Agr. Exp. St.; Ont. 

 Ent. Soc. Rep., 1915; Que. Soc. Prot. Plants, 1918.) Causes much 

 loss to flesh and hides, and in lessened milk yield. Introduced from 

 Europe. 



Adult. — A hairy fly resembling, a dark-colored bee; 3^^ inch long, 

 with yellowish- white hairs; abdomen banded above with black and 

 whitish stripes and terminated at apex with reddish-yellow hairs; 

 thorax with four lines often seem as white by reflected light. Mouth- 

 parts rudimentary and ovipositor blunt. Tibiae and tarsi yellow, 

 femora black. June-July (Fig. 162). 



Eggs. — -Attached in spring and summer to hairs of cattle by a 



