1910] Wheeler—North American Forms of Lasius umbratus 243 
Caldwell, N. J., from Mr. Pergande. 
The worker is distinguished by the abundant, erect pilosity of 
the antennal scapes and tibiz and by the complete absence of 
appressed pubescence on the gaster. The latter region, owing to 
the lack of the fine punctures connected with the pubescence, is 
remarkably shining. With the aid of a very strong lens its surface 
is seen to present, in addition to the hair-bearing punctures, only 
a very fine rugosity, in the form of long, transverse meshes. 
Whether this form is to be retained as an independent species or 
is to be regarded as a subspecies of wmbratus, cannot be decided at 
present. 
In the male the antennal scape is densely covered with short, 
oblique hairs as on the male of the European wmbratus; it is 
-relatively short and when placed transversely reaches beyond 
the eye about two fifths of the length (in wmbratus the trans- 
versely placed scape extends easily half its length beyond the eye). 
The tibiz bear only a few erect hairs. The general pilosity is 
more abundant and like that of the males of the true wmbratus 
which I have before me.” (Emery.) 
I have translated the original description because I have not 
seen specimens of speculiventris. In my “Annotated List of the 
Ants of New Jersey”’ I stated that I had taken this form at Fort 
Lee and Great Notch, but examination of these specimens shows 
that they are merely very shining examples of aphidicola. As 
the characters mentioned in Emery’s description are scarcely of 
specific value, I believe that I am justified in placing speculiventris 
among the umbratus forms. As already stated the subspecies 
described above as vestitus may be merely the hitherto unknown 
female of Emery’s form. 
