THE HESSIAN FLY. 47 



and female insect is given, of which the following is an abstract. 

 The illustrations to which reference is made are taken from the 

 drawings of the same author. The high standing of Dr. Fitch, 

 as an entomologist, coupled with the attention he has devoted 

 for many years to the history and habits of insects injurious to 

 vegetation and to the agriculturist, confers the utmost value upon 

 his delineations and descriptions. 



THE FEMALE HESSIAN FLY. 



75. The head and thorax of the female (Fig. I) are black. 

 The antennae (Fig. e) are about half as long as the body, and 

 composed of sixteen joints, each of a cylindric oval form, the 

 length being about double the diameter ; each joint is clothed 

 with a number of hairs, surrounding it in a whirl. The joints 

 are separated from each other by very short translucent filaments, 

 having a diameter about one third as great as the joints them- 

 selves. The thorax is oval and black ; the poisers are dusky ; 

 the abdomen is of a black colour above, more or less widely 

 marked at the satures (joints) with tawny fulvous, and furnished 

 with numerous fine blackish hairs. 



Nat. Site. 



(PIG. e.) 



JOINTS OF THE ANTENNA. 

 (FIG. I.) 

 HESSIAN FLY FEMAXE (C. destructor.) 



75. The ovipositor is rose-red. The wings are slightly dusky. 

 The legs are pallid brown, the tarsi black. The several pairs of 



