1903] 



WHEELER . 



TEXAN FORMICIDAE 



95 



metapleurae similarly but more coarsely sculptured, subopaque. Petiole and gaster covered 

 with piligerous punctures like those on the pronotum. 



Whole body clothed with pale yellow, reclinate or appressed hairs, among which there 

 are longer, more scattered, suberect hairs, especially on the thorax and abdoinen. 



Yellowish ferruginous throughout, mandibles, antennae, and legs somewhat paler. 

 Epinotum, mesopleurae, and posterior gastric segments sometimes more reddish or brown- 

 ish. Teeth of mandibles and anterior border of clypeus blackish. 



Female (dealated). Length 3.25 mm. 



Very much like the worker in form and coloration. Each ocellus with a small black 

 spot at its margin. Head distinctly more opaque than in the worker, owing to a denser 

 aggregation of the piligerous foveolae; the node is thinner antero-posteriorly and its ante- 

 rior surface is very flat or even slightly concave from side to side. Alar insertions black. 



Described from two females and numerous workers taken at Austin, San 

 Angelo, and Fort Davis. The species is not common. It occurs in colonies not 

 exceeding a dozen individuals and usually much smaller. I have found it only on 

 dry hill-slopes under rather small stones (limestone in central Texas, volcanic rock 

 in the Trans-Pecos). 



P. inexorata is closely related to P. distinguetida Emery of Venezuela, Brazil, 

 and Paraguay, but is smaller and yellowish ferruginous in color instead of fuscous. 



3. Pheidole titanis, sp. nov. 



Soldier. Length 7.25-8 mm. 



Head proportionall}' small, hardly larger 

 than the gaster, a little longer than broad, 

 excluding the mandibles, subcordate, somewhat 

 broader behind than in front, with prominent 

 rounded posterior corners ; posterior border 

 deeply excised in the middle. A deep groove 

 extends from this excision to the frontal area. 

 Mandibles robust, convex, with flattened, edentu- 

 lous, and nearly straight blades which terminate 

 in two prominent apical teeth. Clypeus short, 

 its anterior border deeply excised in the middle, 

 feebly and sinuately concave on either side ; 

 median surface rather flat and depressed. Fron- 

 tal area triangular, as long as wide. Frontal 

 carinae long, diverging, continued backward 

 nearly to the middle of the head. Antennae 



very small, scape distinctly flattened but hardly incrassated, reaching only to a little beyond 

 the posterior orbit ; funiculus slender, its joints all decidedly longer than broad, club very 

 short and indistinctly marked off from the remainder of the funiculus. Eyes moderate, 

 round, at about one third the distance from the anterior to the posterior border of the head. 



Fig. 3. Pheidole tit.inis. 



Head uf soidier. 



