a 
Deinocerites. 
6. Trumpets abruptly truncated (Pl. I, fig. 15). A .5 Howardina. 
Acartomyia. 
7. Trumpets contracted at opening ; opening circular : : . Mochlonyx. 
8. Trumpets contracted at opening; opening slit like ¢ : . Corethra, 
Two types of antennz occur in the above descriptions. 
I. Stegomyia type figs. 4, 5, 6, 7, 8, 9, 10, seen in Stegomyia, Desvoidea, Acartomyta. 
2. Culex type figs. 13, 14, 15, 16, seen in Culex, Melanoconion, Txentorhynchus, 
Grabhamia. 
The differences in the two types is so fundamental as to suggest that the 
siphonate Culictde are derived from two main types, one giving rise to the 
Stegomyie, the other to the Culicine (restricted sense, see later). The 
antennz of C. concolor and Mucidus appear distinct from either, though that of 
Mucidus approaches more closely to the Stegomyza than the Culex type. 
The siphon tube is of specific value since it is subject to considerable varia- 
tion in nearly related species. In many cases the characters of the siphon tube 
appear also to be of generic significance, z.e., Culex, Stegomyia, Tentorhynchus, 
etc. 
The mental plate is a structure well worth further study. Very distinct 
characters were present in S/egomyzta, Culex, Melanoconion, Teniorhynchus, 
C. concolor, and Mudzcus. 
It is evident that, in general, genera based upon the adult characters are 
established still more firmly by a consideration of the characters of the immature 
stages. But there are many points brought out very clearly by immature 
characters which are not so evident on consideration of adult characters alone. 
Theobald’s classification according to adult characters is briefly as follows. (The 
reasons for the groups are.not given. See, however, manual of the Cudicide.) 
SuB-FAMILY. 
1. Sub-fam. Anophelina . : - : . Anopheles, etc., ete. 
2. i Megarhinina - - 3 . Megarhinus. 
Toxorhynchites. 
Fanthinsoma. 
3. yy Culicina 4 5 : | Psorophora. 
Mucidus. 
Stegomyta. 
Desvotdea. 
SONNE - heobaldia. 
utsia. 
Culex. 
Gilesia. 
Lastonocops. 
Melanoconion, 
Grabhamta. 
Acartomyta. 
Teniorhynchus. 
Mansonia. 
