THE WHEAT MIDGE. 87 



146 (a). The male wheat midge is a rare insect, and differs 

 from the female in one particular point by which it may be easily 

 distinguished (Fig. IV.) The antennae are double the length of 

 the body, and twenty-four jointed. The joints are of an exact 

 globular form, and encircled with a row of hairs. (Fig. e.) 



Foot of Wheat Midge, 



highly magnified. 

 (FIG. e.) 

 Part of a male antenna. 



PIG. IV. MALE OP THE CLEAK- WINGED WHEAT MIDGE MAGNIFIED. 



THE SPOTTED WINGED WHEAT MIDGE. 



(Cecidomyia arealis. Fitch.) 



147. The spotted winged wheat midge is distinguished from 

 the preceding insect by having spotted wings ; six spots are com- 

 monly found on each wing. The length of this insect is about 

 one-twentieth of an inch, while that of the common clear-winged 

 wheat midge is about one line, or the twelfth part of an inch, 

 although much smaller specimens are not unfrequently met with. 



148. In the Rural New Yorker, for June, 1856, Dr. Fitch 

 says, in an admirable communication on the wheat midge : 



" The fact then is, there are two species of this insect devas- 

 tating our wheat. But as these species are alike, so far as we 

 yet know, in their habits, transformation and external appear- 



