346 bulletin: museum of comparative zoology. 



anterior face and moderately convex dorsal surface, seen from above it is 

 elongate oval and somewhat narrowed in front. Postpetiole subglobular, 

 slightly broader than long and distinctly broader than the petiole. Femora 

 rather strongly thickened. 



Shining throughout. Mandibles finely striate. Disc of clypeus with three 

 longitudinal rugae, which continue up the front parallel to an outer pair of 

 frontal rugae and become retulate on vertex and occiput, with the spaces 

 between finely and shallowly punctate. Cheeks and sides of occiput reticu-* 

 lately rugulose, antennal foveae bordered with a ridge that is distinctly angu- 

 late at middle of sides of the pro- and the mesonotum. Petiole and post- 

 petiole more finely reticulate, with the sides of the former and especially of 

 the peduncle strongly margined. Gaster with short, parallel striae at base. 



Color light brownish yellow with the gaster infuscated. 



Feviale. Length 2.80 mm. 



Epinotal spines shorter and stouter than in the worker; episternal spines 

 more slender. 



Sculpture of head as in worker. Mesonotum and scutellum Aith longi- 

 tudinal, somewhat irregular, punctate rugae between. The /est similar to 

 worker. 



Color dark brown to black. Wings clear, with pale veins and stigma. 



Ugi: Pawa (Type-locality). Three Sisters: Malapaina. 



The one colony that I found was in a hollow twig, and contained 

 two of the curiously dark-colored females. 



This species closely resembles pacifirum Mayr, but has the petiole 

 less compressed in front. The coloration, yellow-brown, with infus- 

 cated gaster, is different. 



73. Tetramorium guineense (Fabricius). 

 Formica guineense Fabr., Entom. syst., 1793, 2, p. 357, y . 



Malaita: Auki. 



The finding of only one colony of this species indicates that it is not 

 especially abundant in the islands, though no doubt it will eventually 

 become widespread in the plantation districts. 



74a. Tetramorium scrobiferum Emery, var. elysii, var. nov. 



Worker. Length 2.75-3 mm. 



Head longer than broad, broadest behind eyes; sides in front of eyes nearly 

 straight, occipital corners rounded, border shallowly concave. Mandibles 



