1 903] WHEEL ER : — TEX A N FORM TCI DA E 9^ 



different parts of Travis Count3\ Texas, in open, sunny grass-lands. Each nest 

 was surmounted by a regular moundlet about four inches in diameter and consist- 

 ing of coarse pellets of earth. The ants are very pugnacious but their stings are 

 feebly developed. 



Ph. texana, like the preceding species, belongs to the group comprising Ph. 

 hyatti and Ph. crassicornis, on account of the flattening of the antennal scape in the 

 soldier, the relatively small head, etc. Ph. fexafia, however, is readily distinguished 

 by the coarse reticulation covering the whole head and leaving no polished poste- 

 rior angles, and by the antennal scape which is intermediate in length between that 

 of Ph. hxatti and Ph. crassicornis. 



5. Macromischa subditiva, sp. nov. 



Worker. Length 2-2.5 m'Ti- 



Head somewhat longer than broad, rounded at the posterior angles and convex above. 

 Mandibles rather small, with three acute apical and three much smaller basal teeth. Cly- 

 peus short, broadly rounded in front, convex in the middle, with a prominent median carina 

 running its full length and continued over the frontal area. Frontal area large, triangular, 

 longer than broad. Antennae long, 12-jointed; scape extending beyond the posterior corner 

 of the head to a distance equal to twice its breadth; first funicular joint nearly as long as the 

 three succeeding joints together, joints 2-8 about as long as broad, two penultimate joints sub- 

 equal, together as long as the terminal joint. Thorax short and thick-set, dorsum in profile 

 convex, evenly lounded; prothorax 

 with broadly rounded angles, pro- 

 mesonotal suture very faintly, meso- 

 epinotal suture somewhat more dis- 

 tinctly indicated. Epinotum armed 

 with two stout spines, which are very 

 close together at their bases but 

 diverge strongly outward, upward, 

 and backward; epinotal declivity con- 

 cave. Petiole long, with a conspicu- 



ouslv elongated peduncle which passes „ ,,. . , ,,.^. ,,, , 



-' " ^ ^ Fig. 5. Iiliicroiinscfui subdttiva, ^■p.nox. Worker. 



very abruptly into the transverse 



node; the latter is much compressed antero-posteriorly when seen in profile, the anterior 

 and posterior surfaces being flattened and perpendicular, the summit of the node narrow 

 and rounded ; when seen from behind, the edge of the node is horizontal and nearlj' straight. 

 There is a small but distinct tooth on the ventral surface of the petiole near its anterior end. 

 Postpetiole from above but little wider than the- node of the petiole, fully twice as broad as 

 long, rounded oblong; in profile it is nodiform, very convex dorsally, in both views showing 

 a decided constriction at its insertion into the gaster. Gaster of the usual shape, with a 

 long, powerful sting. Legs of the usual shape, with the femora conspicuously incrassated 

 in the middle. There are no spurs on the middle and hind tibiae. 



