WHEELER, NORTH AMERICAN ANTS 343 



43. C. fallax discolor var. clarithorax Emery 

 California; Illinois; Pennsylvania. 



44. C. fallax discolor var. cnemidatus Emery 



Maryland. 



45. C. sayi Emery 



Emeby, Zool. Jahrb. Abth. f. Syst, VII, p. 679, PI. 22, Figs. 27, 28, ^ , 1893. 



Worker major. Length, 7-8 mm. ; head, 2.5 x 2.4 mm. ; scape, 1.7 mm. ; hind 

 tibia, 2 mm. 



Head large, but little longer than broad, broader behind than in front, with 

 broadly excised posterior margin and prominent posterior corners. Eyes 

 moderately large, feebly convex. Mandibles 5-toothed, convex. Clypeus with 

 very short lateral limbs and subrectangular median portion, which is slightly 

 convex but not carinate, with depressed border and small median notch. 

 Frontal carinse lyrate, rather far apart. Frontal area subtriangular, broader 

 than long. Frontal groove distinct. Antennal scapes short, not reaching the 

 posterior corners of the head, slender and terete at the base, somewhat thicli- 

 ened distally. Thorax stout and short, narrower than the head, robust in 

 front, narrowed and laterally compressed behind ; pro- and mesonotum flat- 

 tened, in profile moderately arcuate ; epinotum with subequal base and de- 

 clivity meeting to form a distinct though obtuse angle. Petiole high and 

 rather narrow, compressed anteroposteriorly. with convex anterior and flat- 

 tened posterior surface, its margin entire and rather acute. Legs short, 

 femora stout. 



Head and thorax shining, very finely shagreened ; cheelis and front with 

 small, round, scattered punctures. Mandibles more coarsely punctate. Gula, 

 sides and posterior corners of head glabrous. Gaster very finely, transversely 

 shagreened. with small, scattered, piligerous punctures, its surface even more 

 shining than the head and thorax. 



Hairs white or pale yellow, erect, very sparse ; present in a transverse row 

 on the epinotal angle, margin of petiole and in two rows on each gastric seg- 

 ment, one across the middle and the other along the posterior edge. Legs and 

 scapes nalied. Pubescence extremely short and dilute, even on the gaster. 



Head, antennte, thorax and legs yellowish red ; the head slightly darker ; 

 gaster blacii, with the posterior borders of the segments yellow. 



Worker minor. Length, 4.5-6 mm. 



Head proportionally longer than in the worl^er ma.ior. with straight and 

 more nearly parallel sides, straight posterior border and rounded posterior 

 corners. Clypeus more convex in fi'ont. but not carinate, its anterior border 

 with a minute median notch. Mandibles less convex, eyes more convex than 

 in the worlier ma.ior. Antennal scapes extending about one-third their length 

 beyond the posterior corners of the head. Thorax less robust; petiole with 

 blunt border. 



In sculpture, color and pilosity much like the worker major ; head more 

 shining and without small, scattered punctures on the sides and front. 



