146 U. S. NATIONAL MUSEUM BULLETIN 216 



into a high flange with an earlike dorsolateral projection; temple 

 very short, almost flat; occipital carina strong above, weak laterally, 

 absent below; cheek about 0.6 as long as basal width of mandible; 

 mandible rather short, tapered a little toward apex, its two teeth of 

 equal size; apex of labrum just reaching apical margin of clypeus; 

 flagellum of moderate length, unspecialized ; pronotum posteriorly 

 with a swelling just below its upper margin, its upper margin otherwise 

 thin and unmodified; propleurum wealdy convex; scutellum short, 

 convex, with a weak, often incomplete, lateral carina; areolet absent; 

 intercubitus distinctly reclivous, separated from second recurrent by 

 0.1 its length; ncrvulus postfurcal by about 0.3 its length; nervellus 

 broken near its lower 0.4; dorsal end of prepectal carina at level of 

 midheight of hind margin of pronotum, far from front edge of meso- 

 pleurum; sternaulus a short, broad, weak impression; metapleurum 

 covered with dense small punctures; propodeum rather short, its api- 

 cal half abruptly declivous; longitudinal propodeal carinae complete 

 but the transverse carinae mostly absent, the costula absent 

 (in the species at hand) , and the areola and median basal area always 

 confluent; propodeal spiracle elongate; legs relatively slender; second 

 trochanter of front and middle legs almost completely fused with its 

 femur; spurs of middle tibia elongate, of approximately equal length; 

 tarsal claws apparently simple; abdomen a little widened toward 

 apex; first tergite about 2.1 as long as wide, broad at base, its spiracle 

 near its basal 0.18, in profile with a straight dorsal edge and an oblique 

 basodorsal edge, the two edges meeting in a sharp, 120-degree angle; 

 longitudinal carinae of first tergite strong and sharp to the apex, the 

 median ones converging to the basodorsal angle, thence running 

 closely parallel to the apex; second tergite with a pair of strong, 

 median dorsal carinae, which in the species at hand are closely parallel 

 and continue to the apex; third and fourth tergites with a single 

 weak, incomplete, median dorsal carina; tergites three to six with 

 an oblique, weak, basolateral groove which cuts off a small basolateral 

 corner; epipleurum of first and second tergites vestigial, of third 

 tergite narrowly wedge-shaped, of fourth to sixth tergites moderately 

 wide and fully separated from their tergites by a crease; seventh 

 tergite of both sexes retracted; female subgenital plate large, un- 

 specialized. 



The above description is based on an undescribed species from 

 Burma, which is also the species illustrated in figure 173, a. After 

 the paper was in galley proof we saw also the genotype (tibialis) from 

 Europe, an undescribed species from Madagascar, another from For- 

 mosa, and (Orthocentrus) Drepanoclonus bifasciatus Brulle, 1846 (new 

 combination), from Tasmania. The above generic description agrees 

 in the main with these species, but not in all particulars. 



