Genus Culex, 387 



other Cullcidae I have seen from America. The thin wing 

 scales at once exclude it from Culicada, and Felt places it in his 

 genus Culiseta which is adopted here. 



Genus CULEX. Linnaeus. 



This large unwieldy genus has now been much reduced by 

 excluding a number of species and placing them in separate 

 genera. Two of these genera (Culiseta and Culicelsa) seem to 

 be formed on very slight characters and can scarcely be given 

 any definite squamose characters. Felt's genitalic characters do 

 not seem definite enough in all cases, and the venation is too 

 variable to take with any degree of seriousness. As squamose 

 characters are not sufficiently marked in these cases reliance for 

 generic distinction must, I feel sure, be placed on the palpi of $ 

 and $ if they are to be kept separate. 



Taking Culex pipiens as the type of the genus Culex we find 

 a peculiarity in the male genitalia, namely, the foliate lateral plate 

 on the prominence of the basal lobe. 



As far as I have been able to examine specimens micro- 

 scopically only those with this character are now included here 

 in Culex proper. 



The species all present a great similarity. Previous characters 

 given founded on pipiens and fatigans may be taken as the 

 generic characters here adopted. 



Culex vishnui. Theobald (1901). 

 Mono. Culicid. I., p. 355 (1901) and III., p. 161 (1903). 



$ . The male genitalia have been isolated in this species 

 from specimens sent me by Dr. 

 Christophers. 



The clasper is very much 

 curved and expanded, with a 

 small lateral terminal segment ; 

 the basal lobe is moderately 

 long, contracted abruptly at the 



apex just below the later process wing of Culex vishnui. $ . Theobald. 

 which bears three long broad 



spines, the first the shortest, the other two slightly curved at the 

 apex, then three more uniform shorter spines and a foliate plate 

 which ends acutely. 



2 c 2 



