THE HESSIAN FLY IN GREAT BRITAIN. 5 



the generative organs, the peculiar structure of which is now 

 found to be of great importance in the determination of nearly 

 allied species among various insects, but which it is very difficult 

 to describe without the aid of figures. Two thick blunt processes, 

 which project forwards, are placed between the roots of the 

 forceps, each of which has a small rounded eminence on its 

 extremity. Beneath and behind these, occupying a central 

 position, is an elongated tapering organ extending nearly to the 

 joints of the claws of the claspers, which is flanked on each side 

 by a flattened hairy process with a dilated extremity. These 

 organs are of a pink colour. 



The legs are rather paler than those of the female ; the fore 

 coxse are pink. 



The 7vings are proportionably longer than in the female, and 

 less nigrescent. Mr. Inchbald tells me that when they are first 

 expanded, " a ruddy tinge is observable throughout the wing." 

 This is less conspicuous in the female. 



R. H. Meade. 



1, Mount Eoyd, Bradford, June 15, 1887. 



