212 
Psyche 
[December 
face, faintly convex or flattened superior surface, which 
posteriorly rapidly descends toward the postpetiole. Post- 
petiole from above with convex node, which is very distinctly 
broader than long. 
Head, thorax, petiole, and postpetiole, with foveate im- 
pressions, subopaque; those on the head much finer, espec- 
ially on the front and vertex where they are intermingled 
with very fine longitudinal rugulse ; remainder of head, and 
dorsum of thorax, petiole, and postpetiole reticulate-foveate. 
Gaster glabrous, appendages very similar. 
Head, thorax, petiole, postpetiole, and gaster sparsely 
covered with short, erect, clavate hairs of a grayish or light 
yellowish color. Pubescence very fine and appressed, ex- 
tremely sparse, most easily discernible on appendages. 
Color deep reddish brown or ferruginous brown, with 
lighter appendages and gaster. Eyes and mandibular teeth 
black. 
Described from a single worker, the type of which is in 
my collection. 
The type worker, and an abnormal worker specimen were 
collected by Miss Mary Talbot in the nest of Aphseno gaster 
fulva subsp. aquia Buckley in a roadside ditch at Plainfield, 
Illinois on May 25, 1933. 
This species is so different from all of the Leptothorax 
with which I am familiar that I am somewhat hesitant in 
trying to assign it to its proper taxonomical position. In 
Wheeler’s key to the species of Leptothorax (Proc. Acad. 
Nat. Sci. Phila. p. 223, (1903) the specimen would appar- 
ently key down to the acervorum canadensis group. From 
canadensis the species can be distinguished by the following 
characters: (1) lack of a distinct longitudinal impression 
on the clypeus, (2) longer scape, (3) shorter thorax, (4) 
poorly developed pro-mesonotal and meso-epinotal sutures, 
and (5) differently shaped petiole and postpetiole. 
The most striking characteristics to me are the unusually 
prominent eyes of the worker, as well as the peculiar type of 
sculpturing; the species has, therefore, been very aptly 
named foveata. 
