10 CLASSIFICATION OF MOSQUITOES. 
on the wing veins; ten veins and subdivisions of veins which reach the 
margin of the wings and a vein along the posterior margin; and by 
the absence of a discal cell and of spurs at the apex of the inner side 
ef the tibiee. 
In the family Culicide as thus restricted Theobald in the year 1901 
erected the following five subfamilies: Anopheline, Megarhinine, 
Culicine, Aédeomyine, and Trichoprosoponine. The Aédeomyine 
were separated from the Culicinee by the much shorter palpi of the 
male. This appeared to be a natural division so long as there were 
known only forms wherein the palpi of the male in the one group are 
at least as long as the proboscis, while in the males of the other group 
they are less than one-fifth of this length; but the recent discovery of 
forms in which the male palpi are in one case one-third as long and in 
the other nearly one-half as long as the proboscis, greatly weakens the 
supposed importance of this difference in the relative length of the 
male palpi. Moreover, both as regards the larva and the structure of 
the tarsal claws and shape of the scales in the adults, some of the forms 
with short palpi in the male are much more closely related to species 
with long palpi in the male than they are to any of the others of the 
group with short palpi. These two divisions are thus seen to be 
unnatural and the two proposed subfamilies, namely, Culicins: and 
Aédeomyine, should therefore be merged into one. 
In the year 1904 Lahille separated out the genus U/ranotenia as the 
type of a distinct subfamily which he named Uranoteenina, giving as 
its principal distinguishing character the great elongation of the peti- 
ole of the first submarginal cell and the consequent shortening of this 
cell; the larva has the four tufts near the middle of the head repre- 
sented by stout spines which are covered with spinules. Lutz, in the 
same year, erected four supposed new subfamilies: Hemagogine, 
Aédinz, Hyloconopine, and Dendromyin: the first of these belongs 
to the Culicine as above constituted, the second is a mixture of three 
subfamilies having short palpi in both sexes and the posterior end of 
the thorax bare, while the Hyloconopine and Dendromyinz will fall 
as synonyms of Trichoprosoponine. 
Very recently, in the early part of the present year (1906), Miss EK. G. 
Mitchell erected two additional subfamilies: Psorophorine and Deino- 
ceritinee. The first was founded on the genus Psorophora, previously 
placed in the Culicine, but which, according to the habits of the larva, 
and the structure of its mouth parts, is much more closely related to 
the Megarhinine. The second subfamily was founded on the genus 
Deinocerites, which differs radically from all the other members of the 
Culicide, not only in the structure of the mouth parts, particularly 
the mandibles, of the larve, but also in the antenne of both sexes in 
the adults, 
