1934 ] 
Two New North American Ants 
211 
TWO NEW NORTH AMERICAN ANTS 
By M. R. Smith 
State College, Mississippi 
Recently I received for identification from Illinois, two 
species of ants which I believe to be new to science. One 
of these, a Leptothorax, was collected by Miss Mary Talbot 
at Plainsfield. To this species, which is characterized by 
its peculiar type of sculpturing, I have assigned the name 
foveata. The other new ant is a member of the Lasius Acan- 
thomyops group. Workers of this species were collected at 
Herrin, by Drs. T. H. Frison and H. H. Ross. Although 
this ant has many characters that will set it apart from its 
cogeners, I have chosen the name parvula for it because of 
its unusually small size. 
Dr. W. M. Wheeler confirms my opinion that both of these 
species are new. 
Leptothorax foveata sp. nov. 
Worker: — Length 2.43 mm. 
Head moderately large, excluding the mandibles, notice- 
ably longer than broad, with moderately convex sides, 
rounded posterior angles, and straight posterior border. 
Eyes large and prominent, oval, convex, placed near the 
middle of the sides of the head. Mandibles with 5 distinct 
teeth. Clypeus convex, with anterior border entire. An- 
tennae 11-segmented ; scape lacking its greatest width or 
slightly more of attaining the posterior border of the head ; 
first funicular segment longer than segments 1 and 2 taken 
together. Thorax short, robust, convex above ; viewed dor- 
sally the humeri are rounded, the pro-mesonotal suture very 
faintly visible, and the meso-epinotal suture only slightly 
more perceptible. Epinotal spines moderately long and 
robust, directed upward, outward and backward. Petiole 
viewed in lateral profile with feebly concave anterior sur- 
