WHEELER, ISORTH AMERICAN ANTS 345 



female are deeply tinged with brown and have resin-yellow veins and 

 stigma. The male is unknown. 



The types are from southern Arizona and comprise a media and a 

 minima worker taken by Mr. C. Schaffer at Palmerlee, Cochise County, 

 Ariz., a winged female taken by Mr. E. J. Oslar in the Huachuca Mts. 

 and a long series of females and workers of all sizes taken by Mr. C. E. 

 Biederman in Carr Canyon in the same mountain range from a "nest 

 partly in the ground and partly in rotten wood, six inches deep, at an 

 altitiide of 5000 ft." 



48. C. hyatti Emery 



Emery. Zool. Jahrb. Abth. f. Syst., VII, p. 680, PI. 22, Figs. 25, 26, ^ . 1893. 



"Worker. Closely allied to C. marginatus [C. fallax], but the head with 

 more shining and more nearly parallel sides ; posterior corners less rounded, 

 mandibles shining ; thorax impressed in the region of the meso-epinotal suture ; 

 epinotum with the convex base and concave declivity meeting to form an 

 obtuse angle. Piceous black ; mouth, pronotum and legs more or less ferrugi- 

 nous or red. Abdomen black. Length, 3.5-6.5 mm. 



"Head of the worker maxima, 1.9 x 1.8 mm. ; scape, 1.2 mm. ; hind femur,. 

 1.7 mm. ; thorax, 2 x 1.3 mm. 



"From San Jacinto, California ; collected by Mr. Ed. Hyatt ; received tvom. 

 Mr. Pergande. 



"In habitus very similar to C. marginatus : Ijody more thickset. The head iu 

 the worker major has more nearly parallel, less convex sides, more concavely 

 excised posterior border, more prominent anterior and posterior corners, the 

 latter being less broadly rounded. In the worker minor the head is somewhat 

 broader than in the minor woi-ker of the same size, the anterior corners some- 

 what more rounded. The sculpture is very similar to that of the typical 

 marginatus, but much more superficial ; the impressed punctures much shal- 

 lower, scarcely visible on the clypeus. smaller on the cheeks ; the integument is 

 therefore much more shining. The mandibles are less prominent than in 

 marginatus, with more convex outer borders, also 5-toothed, shining, sparsely 

 punctate. The clypeus also has a very short, rounded lobe, with anterior 

 border strongly emarginate in the middle : flat in the worker major, bluntly 

 roof-shaped in the minor. The lobe is less conspicuous in the large worker, 

 owing to the more prominent anterior corners of the head. The thorax is pro- 

 portionally broader than in marginatus, in profile distinctly constricted be- 

 tween the meso- and epinotum ; the somewhat convex basal and the distinctly 

 concave declivous surface form together a rounded angle. Seeu from above, 

 the pronotum is especially broad and rounded on the sides ; the mesonotum is 

 strongly narrowed posteriorly to the mesoepinotal suture, where the thorax is 

 narrowest ; the sides of the epinotum are nearly parallel. The petiolar scale 

 is somewhat broader and thinner than in marginatus, its upper margin broadly 

 arched and rather sharp. The sculpture of the thorax and gaster are as in 

 marginatus, and the same is true of the pilosity of the whole body. 



"The color is variable ; usually pitch black : mouth, gula and tibia? somewhat 

 reddish ; prothorax, coxje, femora and tarsi light red ; gaster black, with red- 



