818 MR. E. A. ELLIOTT ON THE 



24. QUADRIDENS Elliott. 



Diastephanus quadridens Elliott (3), p. 31, $ . 



5 . Frons strongly arcuate rugose, vertex and occiput strongly 

 trans-striate and sulcate ; three carinse between posterior ocelli ; 

 ocellar space rugose; posterior margin of head bordered. Second 

 flagellar joint one and a half times as long as first ; third as long 

 as first and second together. Prothorax coarsely trans-striate, 

 basally more finely and extreme base smooth ; mesothorax trans- 

 rugose ; marginal punctui"es of scutellum deep. Propleurse finely 

 striate; mesopleurse punctate above, smooth beneath ; metapleurse 

 and median segment strongly cribrate punctate. Petiole finely 

 trans-striate, as long as remaining smooth, shining segments. 

 Terebra longer than body, sheaths black. Hind coxae and femora 

 densely and finely trans-striate, latter bidentate, but the two 

 prominences on basal half so unusually developed as almost to 

 rank as teeth ; tibias compressed to middle. 



Black ; head and two basal antenna! joints rufo-testaceous ; 

 vertex nigrescent. Wings hyaline. 



Length 15 mm.; abdomen 10 mm.; petiole 5 mm.; terebra 

 17 mm. 



Habitat : Luang Prabang, Indo-China. R. V. de Salvaza ; 

 5.x. 1917. Type in British Museum. 



This species is characterized by the unusual development of the 

 femoral subsidiary tubercles, as well as by the sculpture of the 

 prothorax, mesopleurae, hind coxae, and femora. 



25. TEREBELLUS Enderl. 



Stephanus terebellus Enderl. (1), p. 204, 5 • Diastephanus (2), 

 p. 475. 



5 . Head small ; frons arcuate rugose, vertex coarsely, occiput 

 finely transrugose ; posterior margin of head sharply bordered. 

 First and second flagellar joints of equal length, third and fourth 

 also equal and each twice as long as first. Pronotum elongate, 

 polished smooth, punctured only in front and round scutellum, 

 which is polished smooth. Metanotvim very narrow, coarsely 

 longitudinally rugose. Mesopleurse polished smooth above, 

 densely pubescent and diffusely punctate below ; metapleurae 

 diffusely, posteriorly more densely punctate, separated by a slightly 

 raised costa from the median segment, which is finely alutaceous, 

 laterally diffusely plinctate, with a fine longitudinal median line. 

 Petiole finely trans-striate, about as long as rest of abdomen. 

 Terebra only half as long as body, sheaths black, apically ferru- 

 ginous. Hind coxfe finely trans-striate. 



Black ; face, cheeks, temples, 5 basal antennal joints, anterior 

 femora, hind femora beneath, third and fourth stei'nites ferru- 

 ginous. Wings hyaline; stigma and nervures pale yellowish, 

 Antennpe from sixth joint brown ; hind metatarsus whitish. 



Length 8| mm. 



Habitat : Lolodorf , South-East Cameroons. L. Conradt. 



