EMASCULATING-FLIES. 



229 



segment has its anterior half covered with exceedingly short 

 whitish hairs, in which are found a few spots showing the 

 polished surface below. The legs are black and covered with 

 short black hairs. As it does not agree with the description 

 given of Guterehra emasculator Fitch, it deserves a scientific 

 name and C. sterilato?' is proposed for it. 



Another large fly, illustrated in fig. 186, was captured 



Fig. 186. — Cuterebra baccata. Enlarged. Original. 



in the prairie region of Minnesota; it seems to be C. haccata, 

 Sin insect said to produce the large maggots found so fre- 

 quently in the neck and other parts of our three species of 

 hares. Fig. 187 shows a still larger fly, remarkable on ac- 



Fig. 187. — Cuterebra horripilum Clark. Enlarged. Original. 



count not only of its large size, but also of the dense yelloAv- 

 ish-brown fur upon the thorax. It is C. horripiluin of Clark. 

 Still another species, entirely black, and almost as large as 

 the fly shown above is found in our prairies. The his- 

 tory of all is obscure, and possibly a number of these flies 



