the Generic Name Ceratopogon, 



129 



by communis. The description of 1804 is altogether inade- 

 quate, but in 1818 he adds the information " Alle Scheukel 

 einfach, wehrlos," and in 18o0 " Mit nackten Fliigeln." The 

 name Ceratopogon must, therefore, be used for one of the 

 groups with bare or practically bare wings. 



In his original description of C. communis (1804) Meigen 

 says " Man findet sie im Sommer sehr hautig auf Schirmge- 

 wachsen." This habitat agrees with that of C. pavidus, 

 Winn., and its allies, several species of which occur in great 

 numbers on flower-heads of Angelica, but not with that of the 

 other bare-winged groups, the females of which are preda- 

 ceous and are only seldom found on flowers. Malloch, in his 

 ' CnironomidaB of Illinois' (1915), has adopted the name 

 Ceratopogon for this group of species (which KieffVr includes 

 under the genera Atrichopogon and Keinpia), and I was at 

 nist inclined to follow him in tins respect. 



However, in order to make quite sure, if possible, of the 

 identity of C. communis, I wrote to Muus. Seguy, of the Paris 

 Museum, asking him for information as to Meigen's type, it 

 it should be in existence. His repoit was surprising, but 

 decisive, as from his notes and the carefully drawn sketch of 

 the wing of the type male which he sent (reproduced herewith) 



d£=^^£^^&^£Z£^4&2^2^ 



Ceratopogon communis, J . Drawn by E. StSguy. 



it is clear that C. communis differs in some respects from all 

 the species described by Winnertz, and will not tit into any 

 of the genera into which the group has been divided by 

 Kit ffer, though it shows relations with several. 



The genus Ceratopogon must therefore for the present 

 include only the single species communis, Mg., and may be 

 diagnosed as follows, from M. iS^guy's information : — 



Ceratopogon (Meigen, 1803), Edwards, 1920. 



$ . Claws simple, equal. No empodia. Femora slender, 

 unarmed. Eyes quite bare. Wings with microscopic pubes- 

 cence (microtrichia) over the whole surface, and with a few 



Ann. & Mag. N. Hist. Ser. 9. Vol. vi. 9 



