A CRUSTACEAN-EATING ANT. 259 



worker in the head and thorax, even lacking ocelli and with eyes no larger 

 than those of the worker. The petiole is proportionally shorter and 

 higher, so that when seen from above, it is little if any longer than broad 

 behind, shaped like an eqilateral triangle with rounded angles. In some 

 females the upper surface of the segment in profile is flattened like that of 

 the worker, but in most cases it is more convex and in this respect some- 

 what like the petiole of the male. Gaster conspicuously larger, both broader 

 and higher than that of the worker. Sting like that of the worker. 



MALE. Length 5.5-6.5 mm. 



Head, including the very prominent, somewhat reniform eyes, distinctly 

 broader than long ; cheeks and postocular regions very short, ocelli large 

 and protruding. Mandibles small, hardly meeting with their tips, slightly 

 geniculate, broadest at the base and suddenly tapering to a slender point. 

 Clypeus less produced, less pointed in front and with a blunter keel than 

 in the worker. Antenna; long and filiform, 13-jointed ; joints 3-13 long 

 and cylindrical, subequal ; scape very short, hardly a third as long as the 

 third and succeeding joints ; second joint very small, somewhat narrower 

 than the scape and hardly longer than broad. Thorax rather robust, with 

 prominent Mayrian furrows on the mesonotum ; epinotum long and slop- 

 ing. Petiole small, hardly half as high as the first gastric segment, about 

 as high as long, in profile rounded above, with sloping anterior and pos- 

 terior surfaces ; seen from above it is oblong, a little longer than broad, 

 hardly wider behind than in front. Gaster with well developed constric- 

 tion between the first and second segments and large, cultriform, exserted 

 genital appendages, which are fully half as long as the remainder of the 

 gaster. Legs long and slender. 



Smooth and shining, except the antennae, which are opaque. Surface 

 of thorax indistinctly and finely punctate. 



Body covered with yellowish hairs, which are long and prominent on 

 the gaster, shorter on the head and thorax, and still shorter and denser, 

 and more like pubescence, on the appendages. 



Body and legs light yellow throughout. First and second antennal 

 joints yellow, remaining joints brown. Wings grayish hyaline with 

 brownish veins and stigma. 



Type Locality. - - Austin, Texas. 



Otlicr Localities.- -"District of Columbia (Pergande, Mayr) ; 

 Colorado (Cresson, Emery) ; New Braunfels and Belton, Texas 

 (Wheeler). 



