86 INSECUTOR INSCITI^ MENSTRUUS 



iii, p, 195). Without going into the homology of the parts 

 in the Culicines and Deinoceratines at the moment, as I will 

 deal with them later, it is obvious that the parts called har- 

 pagones in Mansonia really correspond with the basal lobes 

 of Culiseta and others. Therefore the table, beginning with 

 dichotomy 5, can be amended as follows, bringing in the 

 relationship of the New World and Old World divisions of 

 A'edes as here defined: 



5. Harpagones present 6 



Harpagones absent 8 



6. Apical appendages of harpagones multiple Psorophora 



These appendages single 7 



7. A fringe of broad scales on inner edge of side piece. . .Haetna go gus 

 No such fringe present A'edes (New World stock) 



8. Side pieces without a conical basal lobe, open within, 



Acdes (Old World stock) 

 Side pieces with such a lobe 9 



9. Basal lobe with a single terminal rod, often situated at the end of 



a process Mansonia 



Basal lobe conical, with several terminal setae Megarhinus, 



Orthopodomyia, Culiseta, Culicella, Climacura 



A REVISION OF THE AMERICAN SPECIES OF 

 CULEX ON THE MALE GENITALIA 



(Diptera, Culicidce) 



By HARRISON G. DYAR 



On a previous page I gave some notes on the relationship 

 of the species of A'edes as shown by the male genitalia. In a 

 review of the other genera with the object of ascertaining 

 the origin of Culex, it appears that the Anopheles are very 

 distinct. In these the sedoeagus is present, simple or with a 

 crown of spines or flattened appendages, and there are no 

 basal chitinous organs whatever. The side pieces are slightly 

 modified, bearing certain stout spines or with small basal lobes ; 

 but we find no homology with Culex and must leave the Ano- 

 pheles aside. In Aedeomyia, the sedoeagus has disappeared, 

 and there is a basal chitinous structure, composed of paired 



