CABEBABA. 151 



nearly one and a half times as broad posteriorly as long ; mandibles 

 robust, convex on the outside, the masticatory margin strongly 

 dentate ; clypeus remarkably convex in the middle, its anterior 

 margin waved, not quite transverse ; antennal and clypeal hollows 

 confluent ; antennal carinze very short ; antennae 10-jointed ; no 

 distinct club to the flagellum ; frontal area obsolete, but a deep, 

 short, vertical frontal groove ; eyes and ocelli large ; viewed from 

 th? side the head is abruptly truncate posteriorly. Thorax much 

 broader than the head, very massive, the pronotum vertical, not 

 forming part of the dorsum, anteriorly depressed below the meso- 

 notum which is somewhat gibbous in front, strongly convex, and 

 a little longer than broad ; scutellurn rounded and convex ; basal 

 portion of metanotum short and sloping, apical portion vertical, 

 subconcave, the posterior lateral angles a little prominent ; legs 

 short and proportionately rather slender. Pedicel somewhat short ; 

 the 1st node viewed from the side is triangular, transverse and 

 rounded above the front, subconcave ; 2nd node transversely 

 rectangular, the lower anterior lateral angles obtusely tuberculate ; 

 abdomen remarkably massive, long, longer than the head and 

 thorax united, somewhat depressed and flat above ; wings with 

 one cubital and one discoidal cell, the radial and cubital nervures 

 extend to the margin of the wing. 



c? . Head broader than long ; eyes and ocelli very large, the 

 former reaching very nearly to the base of the mandibles ; 

 mandibles strong, convex above, with a broad masticatory margin 

 armed with 7 teeth ; clypeus strongly convex, its anterior margin 

 transverse; antennae 13-jointed, the scape very short, not quite 

 so long as the 2nd joint of the flagellum. Thorax similar to that 

 of the $ , but shorter and smaller in every way, the metanotum 

 convex posteriorly. Pedicel similar to that in the $ , but the 

 nodes not so high, the 2nd node forming a mere ring, and attached 

 to the abdomen by the whole of its posterior face ; abdomen long, 

 slightly depressed and curved ; wings as in the $ . 



There is only one species of this genus found within our limits, 

 and the descrepancy in size and appearance between the and 

 the $ or c? is most striking. 



178. Carebara lignata, Ji'esttc. A. M. JN 7 . H. vi (1841), p. 86, $, 

 pi. 2, tig. 6. 



$ . Pale yellow ; the masticatory margin of the mandibles 

 brown, a ring of brown at the articulations of the femora and tibiae 

 of the legs ; head finely and closely, sides of the thorax more 

 sparsely punctate ; thorax above and abdomen smooth and shining ; 

 pilosity pale, oblique, fairly abundant, short on the head, scape of 

 the antennae and the tags, longer and more sparse on the thorax 

 and abdomen. Head convex, subquadrate, rounded posteriorly 

 and in front; mandibles subtriangular, the masticatory margin 

 oblique, dentate ; clypeus convex, produced back posteriorly 



