Insecutor Inscitiae Menstruus 



Vol. IX JULY-SEPTEMBER, 1921 Nos. 7-9 



THE GENUS HAEMAGOGUS WILLISTON 



(Diptera, CuUcidce) 



By HARRISON G. DYAR 



The genus Haemagogus proves to have been inadequately 

 treated in the monograph (Howard, Dyar & Knab, Mosq. No. 

 & Cent. Am. & W. I., iv, 1917). It was not realized that the 

 ordinary criteria of structure and coloration were not diag- 

 nostic for these forms. As a matter of fact, the females of 

 many of the species are practically indistinguishable, whereas 

 the male genitalia show marked characters. This fact was 

 lost sight of in the monograph, because the species were 

 classified first by the females and then a male of each sup- 

 posed species was mounted for examination and figuring. 

 The result seemed complete ; but really several species passed 

 unnoticed by this method. The disadvantage resulting from 

 more careful examination is that some of the older species 

 cannot be recognized at present, being described from females 

 and no male being at hand from the type localities. 



The genus divides into two subgenera, Haemagogus proper 

 (^=Cacomyia Coquillett), in which the claws of the female 

 are simple and the palpi of the male short, and the more gen- 

 eralized Stegoconops Lutz, in which the claws of the female 

 are toothed and the palpi of the male long. The genus is 

 obviously specialized off from A'edes, and in Stegoconops, the 

 claw and palpal structures usual in A'edes are retained. 



In Panama, the only locality from which abundant material 

 is at hand, five Haemagogus occur, one equinus of general 

 distribution, two, lucifer and chalcospilans, inhabiting the At- 

 lantic coast, and two, argyromeris and gladiator, inhabiting 



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