1906.] Wheeler, The Ants of Japan. 319 



middle behind, flattened laterally, with a pronounced median excision in its 

 anterior border. Ej'-es a little in front of the middle of the head. Frontal area 

 distinct, triangular; frontal groove tenuous but distinct, not interrupted in the 

 middle. Antennal scapes reaching to the posterior comers of the head. Thorax 

 in profile with perfectly straight dorsal surface, interrupted by a deep but narrow 

 mesoepinotal depression. Basal surface of epinotum flat, decidedly shorter than 

 the declivity which is concave and separated from the base by a sharp angle. 

 Petiole vertical, as high and as broad as the epiriotum, much compressed 

 anteroposteriorly, somewhat thinner below than above, slightly flatter behind 

 than in front; edge sharp, broadly and evenly rounded when seen from behind. 



Mandibles shining, very finely striated, and coarsely and sparsely punctate. 

 Whole body shining, distinctly reticulate, except the gaster which is very 

 glabrous. 



Hairs white, erect and much scattered on the vertex, gaster and mandibles. 

 Legs and antennae with sparse white pubescence. 



Black; mandibles dark brown, legs dark brown or black, with yellow knees 

 and tarsi; antennse yellow with the tips of the scapes and the funiculi brown 

 or blackish. Gaster with metallic violet reflections. In some specimens, 

 possibly immature, the head and thorax are dark brown. 



Described from numerous specimens collected by Professor J. F. 

 Abbott at Itajima Aki. 



I was at first inclined to regard this variety as a distinct species 

 but Prof. Emery informs me that abhotti differs from the typical itoi 

 only in the metallic violet color of the gaster. 



30. Technomyrmex gibbosus sp. nov. 



Worker. (Plate XLI, Fig. 4.) Length 2-2.5 n^™- 



Mandibles rather large, with straight multidenticulate blades. Head 

 longer than broad; posterior border straight; sides rather convex. Clypeus 

 convex, with a deep notch in the middle of its anterior border. Eyes large, 

 flattened, in front of the middle of the head. Antennal scapes reaching a little 

 beyond the posterior comers of the head; second funicular joint twice as long 

 as broad, remaining joints, except the terminal, hardly longer than broad. 

 Clypeal and antennal foveae confluent. Frontal area obsolescent, frontal 

 groove lacking. Thorax in front f as broad as the head; pronotum broader 

 than long; mesonotum as long as broad, mesoepinotal constriction deep. 

 Epinotum with very convex basal surface, which forms a right angle with the 

 posterior slope of the mesonotum, and passes over into the declivity through 

 a rounded angle; declivity twice as long as the base, flattened above and some- 

 what concave below. Petiole almost without a trace of a node, elliptical from 

 above, about twice as long as broad. Gaster rather narrow, pointed behindi 

 with a slit-shaped anus. 



Mandibles lustrous or shining, faintly and sparsely punctate. Head and 

 thorax opaque, finely and densely punctate or reticulate, the declivitv of the 

 epinotum in some specimens more shining. Gaster smooth and shining. Legs 

 and antennae subopaque like the head and thorax. 



