1934 ] 
New Forms of Aphsenogaster treatse 
11 
Color ferrugineous like A . pluteicornis or varying to fer- 
rugino-testaceous. 
Female. Length 8 mm. 
Like A. pluteicornis but with these few minor differ- 
ences: Flange of the lobe a little higher; scape 1 1-11 the 
length of the head; color similar except that the frontal 
area is darker. 
Alabama : Lookout Mt., Fort Payne, 12-VII-’29. Collected 
by Dr. W. S. Creighton. 
Compared with A. treatse , the head of the worker is not 
so coarsely reticulate, but the antennal lobe is similar ex- 
cept that the anterior flange is longer ; the transverse stri- 
ations of the epinotum usually merge sooner into reticula- 
tions which disappear between the spines, but a few speci- 
mens approach nearer A. treatse in rugosity; the hairs are 
fewer and the color is always lighter. 
This variety exhibits more variability within the nest 
than do our other forms of A. treatse. The sculpture of the 
worker including the striations of the epinotum, and the 
shape of the antennal lobe are intermediate between A. plu- 
teicornis and A. treatse. 
Key to the Forms of Aphaenogaster treatae 
1. Lobe at the base of the antenna short, % or 1-6 the length 
of the scape 3 2. 
Lobe longer, i/ 3 to % the length of the scape 3. 
2. Lobe narrow and very short, 1-6 the scape. Ferrugine- 
ous, head and abdomen slightly darker 
treatse subsp. harnedi W. M. Wheeler (1919). 
Lobe V 5 the scape. Dark fuscous to piceous 
treatse var. ashmeadi Emery (1895) 4 . 
3. Lobe broadly angulate in front. Dark fuscous to piceous. 
treatse subsp. wheeleri Mann (1915). 
Lobe not broadly angulate but evenly rounded 4. 
l 
3 The lobe is measured from the point where the scape begins swell- 
ing to the tip of the anterior surface, nearest the antennal insertion. 
4 Mayr ( 1886 ) first mentioned this variety but failed to name it. 
