54 MOSQUITOES OF NORTH AMERICA 
In certain species of the genus Culea a similar reduction of the male palpi 
is found. In Culex latisquama the palpi of the male are about half as long as 
the proboscis. The reduction is in the apical portion; the apical joint is sub- 
globose, the one supporting it is less than three times its own diameter in length. 
In the female of this species the palpi are about one-fourth the length of the 
proboscis, but, as in the male, have a minute terminal joint. In Culex bisul- 
catus the palpi are slightly less than half the length of the proboscis in both 
sexes. In the female there is a single true joint, which makes up more than 
half the length of the entire palpus. In the male we have been unable to dis- 
cover any differentiated joint except the minute terminal one. 
In Uranotenia reduction has gone to the extreme. In both sexes of U. sap- 
phirinus the palpi are very small, projecting but slightly beyond the clypeus, 
club-shaped and unjointed. 
In the females of most Culicini the palpi are short, although differing much 
in length and configuration in the different species. They consist of a basal 
portion, which in most cases shows a triple false-jointing ; beyond this there is a 
stout joint and in many species this bears at its apex another minute joint. 
Sometimes there is even what appears to be a second minute joint, inserted upon 
the other, but this is with little doubt produced by constriction of a single joint. 
Such a condition exists in Mansonia fasciolatus, as has already been indicated 
by Neveu-Lemaire, It may also occur as an abnormality, as in the case of a 
female Culiseta annulata figured by Dyé and Neveu-Lemaire. In the species in 
which the minute terminal joint is usually absent specimens may occur with this 
joint present. Dyé and Neveu-Lemaire describe such palpi in a female Oulex 
pipiens. We have a Culex tarsalis with the same abnormality. 
In Deinocerites and Dinomimetes the palpi are short in both sexes, but show 
considerable diversity of structure in the different species. In Deinocerites 
pseudes female there is a distinct terminal joint, more than half the length of 
the entire palpus. In the male of this species there is in addition a minute apical 
joint. The palpi of the male D. troglodytus are similar but the apical joint is 
still more minute, while in the female there is no distinct jointing. The palpi 
of D. cancer are unjointed in both sexes. In Dinomimetes epitedeus there is a 
single joint in both sexes. 
In the group of Sabethini the reduction of the palpi is far more general and in 
most species these organs are short and unjointed in both sexes. In the forms 
examined the female palpi always proved unjointed, and although only a few 
forms have been studied it is evident that such is the rule in this group. In 
Joblotia digitatus the palpi are long and slender in the male, distinctly jointed ; 
in the female the palpi are short and unjointed. In Lesticocampa the palpi are 
very slender. They may be long or short in the male, according to the species, 
but they are jointed like those of the male Joblotia. The palpi of the female, 
as in other sabethids, are unjointed. 
