Family 10. SlflULIID/E. Bl/tck Flies. Unlike the foregoing families, they like hot sunshine, and 

 they are one of the greatest pests where thev abound. Their larva' live in swift-flowing streams. Their feelers 

 are short, but composed of many joints ; their body more robust, and legs stout, but heads small. This family 

 and the next connect the mosquito tribe with the flies. 



SIMULIUM. Black Fly. 



1. S. molestum. -fa in. ; the Adirondack black fly, which is very bloodthirsty. 



2. S. innn\iiim. fa in. ; does not bite. 



3. 5 1 . pccuariim. The southern Buffalo-gnat. 



4. .V mcridionale. The Turkey-gnat. 



Family 11. BIB1ONID/E. March Flies. Hair Midge. Like last family, but differs 

 in veins of wing. Does not bite, and its larvae live on roots and decaying vegetable matter. 



1. B. tlioracica. y^ in. ; black ; chest and shanks reddish. 



2. />. ruf thorax. J-jj in. ; black; chest only yellowish-red. 



3. B. femorata. :/% in. ; black, with yellow hair and chestnut-colored shanks. 



4. B. xanthopiis. . : ij in. ; black, with yellow bloom ; black legs and yellow wings. 



5. />'. hctcroptcra. T \ in. ; black, with smoky wings. 



6. B. albipennis. -fa in. ; shiny black, whitish, hairy ; wing white with brown veins. 



7. />'. articulata. ]/ in. ; chest and legs yellow ; head and hodv black. 

 S. B. pallipcs. black ; white, hairy, with yellow legs and wings. 



(23) 



