MANN: ANTS OF THE BRITISH SOLOMON ISLANDS. 311 



of sides of head. Pronotum convex, sides at posterior third produced into 

 short, margined angles. Mesonotum fiat, sloping toward mesoepinotal suture. 

 Base of epinotum flat, submargined at sides, concave between the spines, 

 which are stout and as long as their distance apart at base; basal portion con- 

 cave and feebly margined laterally. Petiole nearly four times as long as broad ; 

 node about three times as long as broad, rounded at sides. Postpetiole one 

 and a third times as broad as petiole, rounded above and at sides. 



Shining. Mandibles coarsely punctate. Cheeks with regular, coarse, 

 separated striae; front with fine striae; vertex and occiput rugulosely punctate 

 and delicately reticulately striate. Thorax, petiole, and postpetiole very 

 finely rugulose. First gastric segment minutely punctate. 



Fine erect hairs moderately abundant on head, body, and appendages. 



Testaceous to light ferruginous. 



Female. Length 6 mm. 



Head barely broader than long, narrowed anteriorly, concave at occipital 

 border, with a furrow extending to the median ocellus. Mandibles and clypeus 

 similar to those of soldier. Antennal scapes extending to lateral ocelli. 

 Thorax narrower than the head. Epinotal spines strong, slightly shorter 

 than their distance apart at base. Petiole more narrowed above than in the 

 soldier and more distinctly margined and more strongly depressed at middle. 

 Postpetiole similar to that of soldier. 



Head striate on front and cheeks similar to soldier, but the striae of vertex 

 and occiput are less reticulate and the spaces between are not as rugose. 

 Mesothorax strongly longitudinally striate. Scutellum at basal half smooth, 

 except for a pair of foveolate punctures; at apical half irregularly striate and 

 rugulose. Petiole, postpetiole, and first gastric segment sculptured as in 

 worker. 



Hairs yellowish, long and moderately abundant. 



Ferruginous; wings infuscated. 



Ysabel : Fulakora. 



Described from specimens taken from a colony found beneath a log. 

 r?//;e.— M.C.Z. 9,161. 



The closely related P. laminata Emery from New Guinea differs in 

 having the frontal lamellae produced more angularly in front and in 

 its much smaller size. In mendanai, as in laminata and cryptoccra 

 Emery the gaster is microscopically scabrose and subopaque. 



39. Pheidole ISIS, sp. nov. 



Soldier. 2.75-3 mm. 



Head a fourth longer than broad, sides parallel; posterior border deeply 

 concave at middle and vertex very strongly impressed transversely, so that 



