1934 ] 
New Forms of Aphxnogaster treatx 
7 
Male. Epinotum % the entire thorax, slightly longer 
than mesonotum. Spines usually reduced to blunt protub- 
erances. 2 Base 3 times the declivity. 
Head densely punctate. Mesoscutum smooth and irregu- 
larly pitted laterally, finely punctate above, coarser behind ; 
scutellum punctate, mesopleurse smooth, striated near an- 
terior border. Anterior half of base of epinotum smooth, 
posterior half of its base punctate ; its declivity irregularly 
cross-striated. Nodes faintly punctate, postpetiole with a 
narrow band of lateral longitudinal striations. 
Abdomen shining and smooth except the posterior halves 
of petiole and postpetiole, which are rugosely and finely 
reticulate. A few hairs on the head, almost none on the 
thorax; scattered longer hairs on the abdomen. 
Dark fuscous ; legs and tip of abdomen, fusco-testaceous. 
Mandibles, anterior edge of pronotum, tarsi, and genitalia, 
testaceous. 
This supplementary description of the male is taken from 
a specimen sent us by Dr. W. S. Creighton, collected at 
Lookout Mt., Fort Payne, Ala., and considered by him to 
be typical. 
Aphaenogaster treatae subsp. pluteicornis, new subspecies 
Worker. Length 6 mm. 
Differs from the typical treatx in the following details: 
Scape usually lVs the* length of the head exclusive of 
the mandibles. Antennal lobe is about % the length of 
2 The epinotal spines of the males of A. treatse are probably variable 
likewise, although Forel (1886) says “arme de deux epines.” In the 
type nest of A. pluteicornis the spines are vestigial, being represented 
by low rounded protuberances. Sometimes these resemble spines 
broken off near the base. However, small hairs have been found on 
the apparently broken end, and also, an adult male was discovered 
still inside the untorn pupal exuvium with this same rounded projec- 
tion. These facts nullify the possibility of the stumps being broken 
spines. Another nest of this same subspecies, collected at Ivanhoe, 
Texas, has long slender spines on all males. Emery (1895) in speaking 
of A. treatse males reports: “Unter den mir vorliegenden $ $ aus D. 
Columbia finde ich nur eins mit langen und an der Spitze stumpfen 
Dornen; bei alien andern, darunter 2 aus demselben Flaschen wie das 
bedornte Exemplar sind mir stumpfe Beulen zu sehen. Ein leider 
sehr beschadigtes Originalexemplar des $ aus N. Jersey hat kurze, 
stumpfe Dornchen.” 
