MANN: ANTS OF THE BRITISH SOLOMON ISLANDS. 349 



77. XiPHOMYRMEX BISMARCKI Forel. 



Mitt. Mus. zool. Berlin, 1901, 2, heft 1, p. 17, ^ . 



New Georgia: Rubiana Lagoon. 



Two workers were found on the ground near the beach. 



This species is distinguished from the preceding by its smaller size 

 and the shape of the head, which is shorter, with more convex sides 

 and with the occipital border more concave. The eyes are smaller. 

 The color is reddish brown, except the petiole, postpetiole, and gaster 

 which are brownish yellow. 



78. Triglyphothrix obesa (Em. Andre). 



Tetramorium obesum'Em. Andre, Rev. entom., 1887, 6, p. 294, ^ . 

 Male. Length 2.75 mm. 



Head, excluding eyes, a little longer than broad, broadest behind eyes, 

 posterior angles obtuse, border straight. Mandibles large and well formed, 

 with large, triangular apical and subapical teeth. Clypeus convex, anterior 

 border feebly rounded. Antennae robust, 10-jointed; scapes extending 

 beyond posterior borders of eyes; first funicular joint globose; second joint 

 two and one half times as long as broad and longer than the two succeeding 

 joints together, third joint small; joints four to eight longer than broad, sub- 

 moniliform; terminal joint slightly shorter than the two preceding joints 

 together. Eyes large and convex, located at a distance of one fourth their 

 longitudinal diameter from anterior corners of head. Ocelli large. Thorax 

 robust, with strongly impressed Mayi'ian furrows. Scutellum little convex 

 basally, margined at sides; spines reduced to broadly obtusely angulate lamel- 

 lae. Petiolar node longer than high; from above subglobose and shghtly 

 broader than long. Postpetiole from above similar to petiole but broader. 

 Legs long and slender. 



Gaster and legs shining, the rest more feebly so. Mandibles punctate. 

 Head irregularly striate, the striae longitudinal on front and clypeus, transverse 

 between eyes and frontal carinae and oblique and somewhat reticulate on 

 vertex and occiput. 



Pronotum coarsely punctate, especially at sides. Mesonotum reticulately 

 striate. Scutellxma punctate. Epinotum and petiolar peduncle carinate. 

 Petiolar node and postpetiole coarsely but shallowly punctate. Gaster and 

 legs finely punctate. 



Pilose everywhere, similarly to worker. 



