MANN: ANTS OF THE BRITISH SOLOMON ISLANDS. 343 



workers twist the gaster to one side and emit from the anal opening a 

 cyh'ndrical white mass of viscid matter, often up to ten millimeters in 

 length, that resembles a small worm. While being emitted, this curls 

 and twists in a life-like manner so that the first time it was observed 

 and before I had located the motionless ant, I mistook it for a cluster 

 of very small worms. This same habit is common also to an un- 

 determined Fijian species, probably of the same genus. Type. — 

 M. C. Z. 9,175. 



70. ROGERIA EPINOTALIS, Sp. nOV. 



Worker. Length 2-2.25 mm. 



Head longer than broad, broadest behind, with rounded corners and straight 

 occipital border. Mandibular blades with five small teeth. Clypeus convex, 

 rounded anteriorly. Antennal scape extending two thirds the distance to 

 occipital corners, first funicular joint a little longer than the two succeeding 

 joints taken together, joints two to six strongly transverse, seven to nine less 

 strongly so, terminal joint equal in length to the three preceding joints. Eyes 

 little convex, situated at sides of head at a distance equal to their longitudinal 

 diameter from bases of mandibles. Promesothorax robust, evenly convex 

 above and at sides. Humeral angles obtuse. Epinotum broadly and strongly 

 concave; base very distinctly margined in front and at sides; declivity indis- 

 tinctly separate from base and more strongly concave; spines a little longer 

 than their width at base, acuminate, divergent. Petiolar node in profile 

 deeper than long, not narrowed above, with convex dorsum and slightly convex 

 anterior and posterior surfaces; from above, twice as broad as long; peduncle 

 nearly as long as the node. Postpetiole in profile longer than high; anterior 

 surface short and flat, dorsal and posterior surfaces convex; from above, 

 one and one third times as broad as long, broadest in front of middle, with 

 narrowly rounded sides. Legs rather stout. 



Shining. Mandibles sparsely punctate. Head rugose and carinate. The 

 carinae between antennal scrobes subparallel, on vertex more irregular and 

 becoming somewhat reticulate. Those in scrobes more widely separated and 

 oblique. Promesonotum with coarse punctures, which are widely separated 

 in front, very sparse on disc and coarser, becoming confluent posteriorly. 

 Pleurae coarsely punctate, except the metapleurae which are smooth and very 

 shining below, with a margin of coarse punctures above. Base and declivity 

 of epinotum smooth and very shining except for a delicate transverse carinula 

 between the two surfaces,. Anterior face of petiolar node and peduncle 

 smooth and very shining; rest of petiole and the postpetiole coarsely punctate. 

 Gaster, legs, and antennae minutely punctulate and shining. 



Head and body, e.xcepting epinotum (which is glabrous), anterior surface of 



