44 Journal Xew York Entomological Society. [^'°'- xxii. 



an unusual specimen. Three dealated females accompanying- these 

 workers measure a little more than 3 mm. and are rich chestnut brown, 

 with yellow legs and antennae. The upper surface of the head and 

 anterior portion of the mesonotum are coarsely and sparsely punc- 

 tate. The petiolar and postpeliolar nodes are of subequal width, but 

 the latter is proportionally shorter and fully twice as broad as long. 

 The postpetiole bears a small but prominent tooth on its ventral 

 surface. The gaster is long and narrow. 



14. Cremastogaster lineolata Say subsp. opaca Mayr. 



Several workers taken from colonies nesting under large flat stones 

 at San Miguel agree very closely with iMayr's description of the 

 typical form of this subspecies. They are very dark in color and lack 

 the denticles which occur on the petiole in dcntinodis Forel, a form 

 which I took many years ago at Queretaro, Mexico. Several males, 

 accompanying the workers from San Miguel, measure about 3.5 mm. 

 They closely resemble the male of the typical lineolata of the Nor- 

 thern States in form, sculpture and pilosity, but are somewhat darker. 



15. Pheidole chalca new species. 



Soldier. — Length 2.5-3 mm. 



Allied to Ph. fioridana Emery. Head subrectangular, a little longer than 

 broad, with straight, parallel sides and rounded posterior lobes, separated by a 

 deep excision, and with a distinct median dorsal groove continued forward as 

 far as the frontal area. Mandibles convex, with two blunt apical teeth. 

 Clypeus concave and carinate in the middle, its anterior border feebly notched 

 in the middle. Eyes rather large, flat, at the anterior third of the head. 

 Frontal area distinct. Frontal carinje rather long, forming the mesial borders 

 of very feeble but distinct impressions for the antennal scapes. Antennae 

 slender, scapes reaching only a short distance behind the eyes; funicular joints 

 2—8 small, not longer than broad. Thorax robust, shorter than the head and 

 through the humeri more than half as broad. In profile the pro- and meso- 

 notum form a single convex mass, the mesonotum angular and falling rather 

 abruptly behind to the epinotum which is small and has a subequal base and 

 declivity, the latter sloping, the spines small, acute, subcrcct, longer than broad 

 at their bases. Petiole nearly twice as long as broad, a little broader behind 

 than in front, with concave sides ; in profile with both anterior and posterior 

 slopes of the node concave, the node transverse and with rather sharp, feebly 

 notched superior border. Postpetiole nearly ij^ times as broad as the petiole, 

 distinctly broader than long, with its sides in the middle distinctly angular but 

 not conulate. Gaster much smaller than the head. 



Whole body shining: mandibles sparsely but not coarsely punctate. Sides 



