MANX: ANTS OF THE UUITISII SOLOMON ISLANDS. 309 



Very fine, yellow pile scattered throughout. 

 Uniformly yellow. 



Female (dealated). Length 4.50 mm. 



Head about as broad as long; moderately concave behind at middle. Fur- 

 row of vertex shallow. Front with a deep pit anterior to median ocellus. 

 Eyes small, situated at sides in front of middle. Pronotum with short, stout, 

 triangular spines. Epinotal spines a little sliorter than their distance apart 

 at base, stout. Petiole shorter than in the soldier; node similar to that of 

 soldier but with the lateral angles more rounded. Postpetiole twice as broad 

 as long, broadest in front. 



Sculpture of head similar to that of soldier; scrobe coarsely granulose. 

 Mesothorax longitudinally' rugoselj' striate. Scutellum rugose. Epinotum 

 with fine oblique striae. Petiole, postpetiole, and gaster with sculpture 

 similar to that of soldier. 



Pilosity as in soldier. 



Color dark ferruginous, with the legs paler. 



Ysabel : Fulakora. 



Described from a single soldier, a female, and two workers. 



The almost opaque gaster, with the second and third, as well as the 

 first segment, densely punctate, and the color separate erato from 

 tetracanlha Emery. .Judging from Emery's description tclracaniha 

 has shorter epinotal spines. The two forms are closely related; the 

 difference may be only subspecific. P. singidaris Smith has the 

 gaster similarly punctate, but has shorter antennal scapes and entirely 

 different frontal carinae, as shown in Emery's figure (Ann. Mus. civ. 

 stor. nat. Genova,1887, 25, pi. 1, fig. 13). 



38. Pheidole mexdaxai, sp. nov. 



Soldier. Length 4.5-5 mm. 



Head large, longer than broad, with nearly straight sides and deeply e.x- 

 cised border; transversely depressed at vertex; frontal sinus profound to a 

 point a little behind the level of eyes where there is a foveolate pit and more 

 feebly impressed anterior to this, extending to a point opposite the anterior 

 border of eyes and terminating in a small pit. Mandibles stout, very bluntly 

 bidentate at tip. ChTaeus triangular, the surface depressed and flat, weakly 

 carinate for entire length, anterior border depressed and concave at middle. 

 Frontal area not distinct. Frontal carinae shorter than the scapes, dilated 



