Parasitic Insects. 7 



Mucor Racemosus (mucor mold, racemosns in clusters). In 



recurring tumor of horse's shoulder. 

 Cryptogam of Bursatti. 



PARASITIC INSECTS. 



Order DIPTERA (Two- winged : sucking proboscis). 



Sub-order NEMATOCERA (nema thread, keras antenna). 



Family CULICID^, (culex gnat), MOSQUITOES: Anten- 

 nse long, delicate, six segments, in males plumose, legs long, 

 abdomen long and slender, perforating proboscis, blood 

 suckers. 



Culex Pipiens. Common mosquito. 



Anopheles. Malaria-bearing mosquito : black spots on wings. 



Culex Equinus. Pest of horses and other animals. 



Family SIMUIvIID^. BI^ACK FWES. Antenna with many 

 short, thick segments, abdomen short and thick, wings and 

 legs short, blood suckers. Worry animals to death. 



SiMULiUM Reptans. Common near Paris, and in woods in 

 Europe. 



S. CiNEREUM (cines ashes), gray. 



S. Maculatum (macula spot), spotted. 



S. Molestum, Adirondack Black Fly. Pestiferous. 



S. Pecuarum (pecus cattle), Buffalo Gnat. Kills .stock. 



S. Meridionale, Turkey Gnat. Destructive to sitting birds. 



S. Innoxium. Swamps in North America. Harmless. 



S. Columbaschense. Destructive to stock at Kolumbacz, 

 Hungary. 



Sub-order BRACHYCERES (brachys short, keras antenna). 

 Antenna in three segments, the third ringed, palpi two- 

 jointed. 



Family ASILID^, Robber Flies (asilus horse fly). 



Asilus Crabroniformis, Hornet AsiLUS. Like wasp, yellow 

 thorax and tail. 



