1903] 



WHEELER:— TEXAN FORMICIDAE 



107 



insertions of wings reddish in some specimens. Antennal scape, coxae, femora, and tibiae 

 black, articulations of the legs, the tarsi, and funiculus yellow. The gray pubescence and the 

 erect hairs, which are also gra}', are prominent and give the whole ant a silkj appearance. 

 Wings grayish hyaline, rather opaque, with distinct gray nervures ; stigma inconspicuous. 



Male. Length 2.75-3 i"'"- 



Mandibles well developed, but edentulous. Clypeus and head shaped like those of the 

 worker except for the ocelli and the much larger eyes. Antennae long and slender, scape 

 projecting for about half its length beyond the posterioi" angles of the head. Mesonotum 

 rather narrow, con\ex and lounded in front, flattened in the prescutellar region. Scutellum 

 convex. Epinotum with basal surface and declivity flattened, forming a rounded angle at 



Fig. g. a, Preiiohpis hrtiesii, sp. nov. Worker; b, external, 

 genital appendages of male. 



median, d, internal 



their juncture. Petiole robust, thick antero-posteriorly, in profile broadly rounded above 

 convex below ; the summit of the node seen from behind is very slightly arcuate, nearly 

 horizontal. Gaster long, compressed dorso-ventrally. External genital appendages very 

 long, digitiform, rounded at the tip. Median appendages bifid ; inner ramus very long and 

 slender with its papillose surface on the side and some distance from the tip ; outer ramus 

 short, thick, somewhat curved, with an extensive papillose surface at its end. Inner genital 

 appendages long, triangular, with a prominent longitudinal fold near the middle and a very 

 slightly recurved point. Wings of the usual shape. Legs rather long. 



Head, thorax, and gaster shining, mesonotum more opaque, being very finely and evenly 

 punctate. Legs and antennae subopaque. 



Legs and antennae clothed with fine gray pubescence, as are also the head and thorax. 



