814 ME. E. A. ELLIOTT ON THE 



Length 9-13 mm.; abdomen 5-8 mm.; petiole 24-4 mm.; 

 terebra 8^-12 mm. 



Habitat: Hoabinh, Tonkin. R. V. de Salvaza; Aug. 1918. 

 Two specimens in the British Museum. 



The colour of the head in this species is exactly as in 

 D. hilineatus Elliott, from which it difiers in the bidentate hind 

 femora and concolorous teeth. 



19. CHINENSIS Elliott. 



Diastephanus chinensis Elliott (2), p. 73, $ . 



5 . Frons very finely striate, transversely below, becoming 

 longitudinal above, round the anterior tubercle and in the ocellar 

 space; vertex and occiput finely longitudinally striate; posterior 

 mai'gin of head bordered. Basal flagellar joints normal. Pro- 

 notum trans-striate, semiannular more coarsely, especially laterally. 

 Mesonotum coarsely punctate ; centi'al lobe of scutellum with 

 diffuse large punctures, lateral lobes with the external half longi- 

 tudinally striate. Proplevirte longitudinally striate above and 

 smooth beneath ; mesopleurae alutaceous ; metapleurte coarsely 

 punctate aliove, trans-striate beneath, separated by a carina from 

 the cribrate-punctate median segment. Petiole finely trans- 

 striate, with extreme apex smooth, as long as rest of abdomen, 

 which is smooth and shining. Terebra slightly longer than body, 

 spicula rufescent, sheaths black, with subapical white band. 

 Hind coxae trans-striate ; hind femora finely alutaceous and 

 shining, bidentate ; tibiae compressed to beyond middle, alutaceous, 

 the explanate part less strongly sculptured. 



Black; head except vertex, two basal antennal joints and the 

 ant9rior legs rufescent. Wings hyaline, nervures brown. 



Length 12 mm.; abdomen 8 mm.; petiole 4 mm.; terebra 

 13 miB. 



Habitat : China ; Haut Mekong, Tong King. R, Y. de 

 Salvaza. Type in British Museum. 



Distinguished by the sculpture of the frons and vertex, and 

 especially by the striation of the outer lobes of the scutellum. 



20. ALUTACEUS Morley. 



Biastephanus alutaceus Morley (1), p. 109, $ . 



5 . Body entirely alutaceous and dull throughout. Head 

 finely transrugose in front ; all frontal tubercles small ; vertex 

 with one carina behind ))asal tubercle ; a few weak transcarinte 

 at posterior margin of occiput, which is bordered. Antennae as 

 long as hea,d and thorax ; second flagellar joint one and a half 

 times as long as first ; third only as long as second ; all flagellar 

 joints well discreted inter se. Neck with a diseal longitudinal 

 sulcus, apically only laterally transcarinate, semiannular basally 

 explanate. Scutellum as broad as long, apically obtuse, the 



