PLATE LXIV. 



DiCRANURA FLAVIPENNIS. (Page 108.) 



Fig. 1. — The imago. The elytra and wings are too 

 dense in the one, and too dehcate in the other, to 

 show all the usual nervures. 



Fig. 1 a. — Extreme apex of the abdomen of the 

 male, as seen from above. 



Fig. 1 h. — -Apex of the abdomen of the female, as 

 seen partly in profile. The saw-valves may be noted 

 below. 



Fig. 1 c, — Part of the male abdomen, in which the 

 antipenultimate segments are constricted. On the last 

 ring there is a shallow pit, which appears to have a 

 membrane stretched over its floor. I am unable to 

 suggest any economic use for this structure ; and, 

 elsewhere, I have simply called it the caudal cellule. 

 The Cauda, however, which probably is the termination 

 of the alimentary canal, is developed more towards 

 the apex. See fig. 1 a. 



The above abdominal constriction appears to be 

 confined to the male sex. Other species of Dicranura 

 show, also, some tendency to this variation of form. 



Fig. Id. — Part of the pronotum and scutellum of 

 the same insect. The details of the post-scutellum 

 are drawn, together with the insertions, of the elytra 

 and wings. 



Dicranura variata. (Page 108). 



Fig. 2. — Example, with wings expanded ; some of 

 the nervures are obsolete, both in the elytron and 

 wing. 



