ORDER DIPTERA. 



93 



where the face and hands of the mowers are sometimes blistered 

 to much pain" by the suckers of ^he little creatures. 



Fig. 129. — Ceratopogon Femoralus (Mag.) 



One of the most troublesome species is probably the House 

 Gnat i^Odex dliaris), which, thirsting for its evening meal, often 



Fig. 130.— Trichocera Fuscata (Mag.) 



enters our apartments, sounding its approach by a tolerably loud 

 humming. 



