434 bulletin: museum of comparative zoology. 



and convex, situated at anterior third of head. Ocelli large, arranged 

 in a triangle. Epinotal spines shorter than in the soldier. The rest 

 similar to the soldier, with the usual sexual differences. 



Sculpture of head similar to that of soldier, except that the coarse 

 striae extend onto the vertex and occiput. Thorax smooth and 

 shining. Epinotum transversely striate. Nodes and a space at the 

 base of the first gastric segment granulously punctate. Pilosity as 

 in the soldier. 



Color dark fuscous, cheeks and clypeus lighter. Antennae and legs 

 testaceous. Wings strongly infuscated; veins and stigma fuscous. 



Described from several workers and a single female collected at 

 Madeira-Mamore Camp 39. The color of the soldier is striking. 

 The head is rich reddish brown, darker on the vertex and front and 

 lighter on the cheeks and clypeus. The mandibles are a rich red 

 wine-color. The thorax and epinotum are dark fuscous, the gaster 

 is similarly colored, but with the first segment lighter basally. This 

 species approaches P. susannae Forel from which it differs in the 

 much longer and differently sculptured head, the feeble promesonotal 

 impression, and in color. 



83. Pheidole (Pheidole) triconstrida Forel var. laidloivi, var. no v. 



Soldier. Length 3.5 mm. 



Head, excluding the mandibles, a little longer than broad, slightly 

 broader in front than behind; posterior corners rounded; occipital 

 margin rather deeply impressed; occiput at middle with a deep 

 impression which extends to clypeus, becoming shallow anteriorly. 

 Frontal carinae more than half the length of the scape, sharply defined. 

 Eyes at sides of the anterior third of head. Mandibles convex, biden- 

 tate, the teeth thick and subequal. Clypeus trapezoidal, flattened, 

 truncate in front and behind, with a narrow median impression from 

 middle of front extending two thirds the distance to base. Frontal 

 carinae diverging behind. Antennal scapes reaching three foiu"ths 

 the distance to occiput. Antennal club a little shorter than the rest 

 of the funiculus, funicular joints 2-7 broader than long. Prothorax 

 rounded above, sides a little in front of middle drawn out angulately. 

 Promesonotal impression distinct. Mesonotum seen from above 

 trapezoidal, narrowed in front, deeply, transversely constricted at 

 middle, the posterior portion elevated into a ridge. Mesoepinotal 

 constriction deep and broad. Base of epinotum as long as declivity. 



