CLTTNIO BICOLOR. 



85 



able to add it as a species new to the British Dipterous 

 fauna. 



The female very closely resembles that of C. marinus, 

 the distinctions are merely those of colour ; the female of 

 the latter species has not been described minutely, and, 

 hence, I am unable to point out any differences between 

 it and my spirit specimen of C. bicolor. It has not 

 previously been met with, and I can fully endorse the 

 recent suggestion of Gradeau de Kerville who remarks, 

 " La femelle est jus qu'alors inconnue. II y a tout lieu de 

 supposer qu'elle est aptere et vermiforme, comme celle du 

 Clunio marinus." The larva and pupa are, as yet, 



unknown. 



The text-figures show both sexes of the fly, with an 

 enlarged head of the male. 



d- 



? 



& 



Fig. l. r Male of Clunio bicolor. Fig. 2. Lateral view of head of 

 same, shewing projecting anterior margin of thorax. . Fig. 3. Female 

 fly. The natural size is indicated by the lines alongside figure 1. 



