1934 ] 
New Forms of Aphxnogaster treatx 
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. treatx , 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. treatx 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. treatx . 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. treatx . 
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 
treatx subsp. harnedi W. M. Wheeler (1919). 
Lobe 1/5 the scape. Dark fuscous to piceous 
treatx var. ashmeadi Emery (1895) 4 . 
3. Lobe broadly angulate in front. Dark fuscous to piceous. 
treatx subsp. wheeleri Mann (1915). 
Lobe not broadly angulate but evenly rounded 4. 
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. 
