MAY. 139 



where they may be seen rising in swarms, their long legs 

 serving as stilts ; the females deposit their eggs in the earth 

 at a short depth below the surface. The larvse are fleshy 

 grubsj which attack the roots of grass and other plants, 

 doing much injury to the crops ; there are nearly fifty British 

 species, which are well known under the name of Crane-fiies, 

 Harry Long-legs, etc. 



DiPTERA. HlPPOBOSCID^. 



HIPPOBOSCA. 



Generic Distinctions. — AnienncB inserted near the mouth ; head 

 small, round, and attached to the thorax by a neck; thorax 

 large ; wings large and horizontal ; hody soft ; feet short. 



HiPPOBOSCA EQUINA. Fotest or Horse-My. This insect 

 has the head yellow and flattened ; the body, which is broad 

 and short, yellowish, with brown spots; the wings white, 

 transparent, much longer than the body, and rounded at the 

 extremity ; the body slightly hairy. This is a very trouble- 

 some species, living principally on horses, and abounding in 

 the New Porest, Hampshire. It is a singular circumstance 

 that the female Fly nourishes her young within her body. 



