106 PSYCHE . [June 



The species, which I take pleasure in dedicating to my former pupil, Mr. A. 

 L. Melander, is very common in central and Trans-Pecos Texas, where it occurs 

 under stones, usually in rather damp localities but not infrequently also on the 

 sun-scorched limestone hills at an altitude of 1000-5000 ft. Its colonies are seen 

 most frequently during the moister seasons of the year and like the colonies of 

 most of our Texan Camponoti contain males and winged females during the winter 

 and early spring months (January to April ist). 



P. melanderi can be readily distinguished from F. parvula Mayr in having 

 prominent hairs on the antenna! scape in the worker, and in the male by the 

 characteristic genital appendages which are very unlike those of the male parvula. 



The species above described may be identical with the form described by 

 Buckley as Formica terricola, but as this cannot be proved with certainty, since he 

 would be a bold man who would pretend to recognize a particular species of so 

 difficult a genus as Prenolepis among the descriptions of that author, I have 

 decided to reject Buckley's name and redescribe the species. 



9. Prenolepis bruesii, sp. nov. 



Worker. Length 2.5-2.75 mm. 



Mandibles 6-toothed ; third and fifth tooth subequal, much smaller than the others. 

 Clypeus very convex but not carinate in the middle, its anterior border sinuately excised. 

 Head, excluding the mandibles, distinctly longer than broad, not narrower in front than 

 behind, occipital margin feebly excised. Antennal scape reaching to somewhat more than 

 a third of its length beyond the posterior corner of the head ; all the funicular joints longer 

 than broad. Thorax rather robust, pro- and mesonotum flattened above, the former broad 

 and rounded on the sides; mesoepinotal suture pronounced but without a flat bottom, 

 decidedly narrower than the distance between the pair of metathoracic stigmata. Epinotum 

 evenly rounded, its most prominent portion lower than the mesonotal surface, its declivity 

 somewhat flattened. Petiole robust, inclined forward, convex on its ventral surface, its node 

 rather blunt in profile, its upper border horizontal when seen from behind and with rather 

 square corners. Gaster and legs of the usual conformation. 



Very smooth and shining, legs and antennae subopaque, gaster delicately reticulate 

 under a high magnification. 



Legs and antennae clothed with fine, white, appressed pubescence ; head, thorax, and 

 gaster with erect brown hairs which are distinctly longer, more tapering, and more numerous 

 at least on the head, antennal scape, and gaster than in P. melanderi. 



Yellowish brown, head somewhat darker above, gaster blackish, legs and antennae 

 yellow. 



Female. Length 3.75 mm. 



Resembling the female of P. tnelanderi but more robust and of a different color. The 

 head is somewhat shining. Mouth, sides of clypeus, and mandibles pale yellow, the last 

 with black teeth. Head, thorax, and gaster black ; mesonotum, borders of the scutellum, and 



