81 



CLUNIO BICOLOR, KIEFF ; 



A MARINE CHIRONOMID NEW TO THE FAUNA 



OF GREAT BRITAIN. 



By A. D. IMMS, 



Zoological Laboratory, University of Birmingham. 



During the middle of August, 1902,* I came across a 

 number of small dipterous insects skimming over the 

 surface of the rock pools on the shores about Port Erin, 

 Isle of Man. Upon one calm sunny day they were about 

 in considerable numbers, and I was" able to secure several 

 of them. On the following day I observed a few in a 

 similar situation at Fleshwick Bay, a locality a few miles 

 north of Port Erin. When I first examined these 

 specimens, I thought them to be the males of Clunio 

 marinus, Hal., but, after a subsequent careful recon- 

 sideration, I detected differences, and found that the 

 species to which they belong is Clunio bicolor, KiefT. I 

 am indebted to the kindness of M. l'Abbe J. J. Kieffer for 

 corroborating my identification as C. bicolor, and to 

 M. Henri Gadeau de Kerville who sent me some spirit 

 specimens of this insect, last year, from the coasts of 

 France. During the short time I was able to devote to 

 searching for this insect, I only met with one female 



* While occupying the University of Birmingham Table at the 

 Marine Biological Laboratory, Port Erin. 



