716 Bulletin American Museum of Natural History. [Vol. XXIII, 



longitudinally rugulose. Scutellum and paraptera darker than the remainder of 

 the thorax. Wings opaque, fuscous; yellowish towards the base and costal margin. 



Male. (PI. XLIX, Fig. 8.) Length: 2 mm. 



Head, without the eyes and mandibles, but little longer than broad, broader 

 behind than in front, with flattened occipital region and a longitudinal ridge on each 

 side of the rather acute posterior corners. Eyes large and convex, the posterior 

 orbits a little behind the middle of the head. Mandibles like those of the worker 

 in shape but smaller and feebler. Clypeus with entire, rounded anterior margin. 

 Lobes of frontal carinse similar to those of the worker but erect; their posterior ridges 

 short and meeting the lateral carinse. Scapes very short, extending only a little 

 distance beyond the posterior corners of the head; funicular joints cylindrical, joints 

 1-7 less than twice as long as broad, terminal joints somewhat longer. Pronotum 

 with short, acute superior spines; inferior spines absent. Mesonotum with distinct 

 Mayrian furrows. Paraptera produced posteriorly as short teeth. Scutellmn like 

 that of the female. Epinotum with subequal base and declivity, the former convex, 

 the latter concave; spines about half as long as the base, blunt, somewhat curved, 

 directed upward and outward. Petiole and postpetiole like those of the worker, 

 but the former proportionally longer, the latter broader. Gaster elliptical, median 

 genital appendages digitiform, with blunt tips. Hypopygium with entire rounded 

 posterior margin. Legs rather stout; terminal tarsal joints not enlarged. 



Opaque; mandibles and gaster faintly shining; the fomier very finely, the body 

 more coarsely and densely punctate. Head, thorax and postpetiole also irregularly 

 reticulate-rugulose; first gastric segment above with minute, acute and uniformly 

 distributed tubercles. 



Hairs like those of the worker; more distinct and scattered on the gaster. 



Head, thorax and pedicel black; first gastric segment very dark brown; remain- 

 ing gastric segments, mandibles, antennae and legs light brown or yellowish, antennal 

 scapes, coxse, and middle portions of the femora infuscated. Wings like those of 

 the female. 



Texas: Montopolis and Delvalle, near Austin (Wheeler). 



This species which I take pleasure in dedicating to my former pupil, 

 Mr. C. G. Hartmann, who aided me in excavating the nests of this and 

 other Texan Attii, may be regarded either as a degenerate and simplified 

 Trachymyrmex or as an aberrant Cyphomyrmex. It resembles the species 

 of Trachymyrmex in its form and pilosity, while it approaches the species of 

 Cyphomyrmex in its small size, the very large lobes of the frontal carinse, the 

 reduction of the cephalic and thoracic spines and the absence of tubercles 

 on the greater portion of the body. In 1887 (Verb. zool. bot. Ges. Wien, 

 XXXVII pp. 561, 562) Mayr described an aberrant female Attiine ant from 

 Brazil as Cyphomyrmex asper, which, though considerably larger than the 

 above described species, would seem nevertheless to belong to the same sub- 

 genus. More recently Emery (Bull. Soc. Ent. Ital., XXXVI, 1905, pp. 162, 

 163) has described and figured a single worker specimen from Chubut, 

 Argentina, as dubiously referable to Mayr's species. This specimen meas- 



