FIVE NEW STEPHANIDiE IN THE BRITISH MUSEUM. 81 



segment and metapleura? cribrate punctate, the former with an 

 elongate triangular central basal space, punctate and extremely 

 finely trans-striate and dull, bounded by large punctures. Petiole 

 trans-striate, shorter than the remaining smooth segments. Terebra 

 shorter than body, black, spicula pale red. Hind coxje trans- 

 striate, their femora glabrous, bidentate, tibia:; compressed to middle. 

 Wings hyaline. 



Black ; head red, apices of tubercles and the carinee on vertex 

 black, scape and first flagellar joint rufo-testaceous, second joint 

 darker red, apically black ; anterior tibise and all tarsi rufescent. 

 Femoral teeth white. 



Length 13 mm.; abdomen 7i mm.; petiole 3^ mm.; terebra 

 11 mm. 



Hab.— Luang Prabang, Indo-China, September 29th, 1917 (E. V. 

 de Salvaza). 



The sculpture of the median segment resembles that of 

 leucodontus, Schlett., which the author describes as " basally 

 and centrally smooth," and agrees also in the colour of the 

 head and the femoral teeth. It differs in the sculpture of the 

 head and prothoras and in the entirely black terebral sheaths. 



Diastephanus quadridens, sp. nov. 



$ . Frons strongly arcuate rugose, vertex and occiput strongly 

 trans-striate and sulcate, three straight carinee between the posterior 

 ocelli, temples smooth, ocellar space rugose, posterior margin of head 

 bordered. Scape about as long as cheeks, 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 

 the extreme base smooth ; mesonotum trans-rugose, marginal punc- 

 tures of scutellum deep ; propleune finely striate, mesopleurae punctate 

 above, smooth beneath ; median segment and metapleurae cribrate 

 punctate. Petiole finely trans-striate, as long as the remaining 

 smooth segments. Terebra longer than body, black. Hind coxae 

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

 the two prominences on the basal half are so unusually developed 

 as almost to be called teeth, tibite compressed to middle. Wings 

 hyaline. 



Black ; head and two basal joints of antennte rufo-testaceous 

 vertex nigrescent. 



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

 17 mm. 



Hab. — Luang Prabang, Indo-China, October 5th, 1917 (E. V. 

 de Salvaza). 



This si^ecies is characterised by the unusual development of 

 the femoral teeth and by the sculpture of the mesopleur^, hind 

 coxae and femora. 



Diastephanus irilmeatns, n. sp. 



9 . Frons and vertex very finely arcuate striate, occiput trans- 

 striate, posterior margin of head bordered, carinte between the 



