WHEELER, NORTH AMERICAN ANTS 311 



of its anterior border moderately produced, rather narrow, with very faintly 

 sinuous median edge and rounded lateral corners. Frontal carinse lyrate, 

 rather closely approximated. Antenna] scapes terete at the base, neither 

 dilated nor flattened, enlarged towards their tips. Thorax slender, low, evenly 

 arched above in profile ; epinotum with the base fully twice as long as the 

 declivity, which is slightly concave. Petiole rather high and narrow, with 

 convex anterior and flattened posterior surface and blunt lateral and upper 

 border. Legs rather long ; middle and hind tibise triangular in cross-section, 

 with sulcate anterior surface. 



Head, thorax and petiole subopaque, very densely and finely shagreened. 

 Mandibles shining, coarsely striato-punctate. Anterior border of cheeks and 

 clypeus shining, cheeks and sides of head with small, elongate punctures or 

 foveolie ; clypeus and inner borders of frontal carinse, pro- and mesonotum 

 with a few coarse piligerous punctures. Gaster finely and superficially sha- 

 greened, shining. 



Plairs yellowish, erect, moderately abundant on the dorsal surface, very 

 short and appressed on the antennal scapes and legs ; femora with a few long 

 hairs on their flexor surfaces ; bristles lacking on the flexor surfaces of the 

 tibife. Cheeks without erect hairs, those on the anterior border of the clypeus 

 short and inconspicuous. Funiculi with very minute erect hairs. Pubescence 

 very sparse, short on the head and thorax, somewhat longer on the gaster. 



Ferruginous brown ; head darker than the thorax, and the upper surface of 

 the latter often darker than the pleurne. Mandibles and anterior borders of 

 cheeks and clypeus blackish. Scapes infuscated except at the base. Gaster 

 black or dark brown, venter, base of first segment and posterior margins of 

 segments paler. Coxfe and femora yellow, tibite and tarsi ferruginous. 



Worker minor. Length, 6-7 mm. 



Head very long, more than twice as long as broad, excluding the mandibles, 

 somewhat narrowed behind in the occipital region ; cheeks long, parallel. 

 Clypeus like that of the worker major. Thorax very slender ; base of epinotum 

 more than three times as long as the declivity. 



Head, thorax and petiole more shining than in the worker major, paler and 

 more yellowish brown ; head somewhat darker, mandibles brown. Gaster and 

 legs colored as in the worlver major. Pilosity also similar, but there are no 

 minute erect hairs on the antennal funiculi. Cheeks without foveola? or only 

 with a few faint elongate punctures. 



Female. Length of body. 10-11 mm.; of wings. 11 mm. 



Resembling the worker major in sculpture, pilosity and color. Head propor- 

 tionately longer. Eyes large and convex. Thorax as broad as the head, 

 rather depressed ; epinotum with indistinct base and declivity, the former 

 fully as long as the latter. Petiole similar to that of the worker major. 

 Wings suffused with sordid yellow ; veins and stigma pale bi'ownish yellow. 



Male. Length. 7 mm. 



Head through the eyes about as broad as long. Eyes and ocelli very large. 

 Cheeks much shorter than the eyes, straight and parallel. Posterior portion 

 of head broad and rounded. Clypeus subcarinate, with broadly rounded, pro- 



