ENTOMOLOGICAL SOCIETY 
in using them as the basis for genera. It is true that in general 
practice other characters than these are preferable, owing to the 
necessity of preparing the specimens and to the fact that the 
characters are shown by one sex only, and that the one not gen- 
erally collected. I believe, however, that since the groups are 
natural ones it is probable that other recognition characters 
will be found. If they should not be, it might be better to 
reduce the genitalic genera to subgeneric rank, for practical 
reasons, without thereby losing sight of their value. It seems 
inevitable that the genus Culex shall be divided, and the geni- 
talic divisions are more natural than those recently founded on 
scales and papal structure. As to the latter it is necessary to 
remove and mount the palpi, which is as practically objection- 
able a process as any connected with the study of the cT geni- 
talia. 
The sketch herewith of Grabhamia cantator Coq., shows the 
names applied to the different parts. They vary much in 
amount of development as well as in shape in the different 
species. Anopheles shows the simplest arrangement, scarcely 
distinguishable from the Corethrinae. This is in accord with 
the larval characters, since Anopheles larvae are very close to 
some Corethrid forms, as Eucorethra and Dixa. The Culicinae 
have a small articulated tip to the terminal segment of the 
clasper, which appears to be lacking in the Aedinae, although in 
UranotcEnia sapphirina there is a small spine much resembling 
it and probably representing its rudiment. The species of 
Culex show the most differentiation, especially in the true Culex 
or pipiens group and these are the most specialized larvae. We 
have thus a concordance in general as well as special characters 
between genitalic and larval structure 
I have thrown the forms known to me into a synoptic table 
of genera, which follows. A few new names are supplied to fill 
gaps left in Dr. Felt's groupings or as corrections. Nine gen- 
eric names, out of a total of thirty-one credited to our fauna, 
are omitted, as I have had no material to dissect. 
1. Harpes and harpagones absent or greatly reduced; clasp segment 
strong and longer than the basal segment Anopheles 
Harpes or harpagones developed; clasp segment usually shorter than 
the basal segment 2 
2. Terminal clasp without a terminal articulated spine, though often 
otherwise modified, branched or spinous 3 
Terminal clasp with an articulated spine which is usually apical ; clasp 
usually simple, seldom modified 6 
3 . Clasp transparent, membranous 4 
Clasp chitinous, solid 5 
