Indo-Chinese Uijmenoptera. 015 



flavo-testaceis ; alls hyalinis, anticis in medio hie illic fusco 

 leviter suffusis, venis llavo-tesfaceis ; stigmate raagno, dimidio 

 baaali piceo, dimidio apicali pallide flavo. 

 Long. 12 mm.; antennarum long, IG mm. 



? . Eyes large and piomiiient, widely emargiiiate in the 

 middle ot' the inner orbi's ; ocelli large, narrowly separated 

 from each other ; vertex short, narrowed rapidly behind the 

 eyes, the occipital carina feebly arched. Vertex smooth and 

 shining, face closely and rather finely punctured, raised 

 along the median line, cheeks very short ; antenna3 very long 

 and slender, about 83-jointed ; maxillai-y palpi very long and 

 slender. Notauli deep, minutely crenuLite, the niesonotum 

 finely and closely punctured, mesopleurje rather sjjarsely 

 punctured. Median segment with a distinct median carina 

 and several lower transverse carinte on each side, an irregular 

 undulating carina on the lateral margin o£ the dorsal surface; 

 the sides of the segment finely rugulose, with short strong 

 strife above. Abdomen finely longitudinally rugulose on the 

 dorsal surface, subpetioiate, the two basal tergites with a 

 strong median longitudinal carina ; first tergite broadened 

 from the base, three times as long as its apical breadth, the 

 spiracles situated at about two-fifths from tlie base, the ajiical 

 angles produced into a very distinct tubercle on each side ; 

 second tergite about twice as long as its apical breadth, about 

 three-quarters of the length of the first segment, second suture 

 strongly crenulate ; third tergite as broad at the apex as long, 

 very little more than half as long as the second ; fourth and 

 fifth tergites the broadest ; terebra very short. Hind calcaria 

 short and curved, shorter than the fourth joint of the hind 

 tarsi. Radius in liind wing strongly upcurved in the middle; 

 first transverse cubital nervure meeting the cubitus at right 

 angles; second abscissa of the radius long, strongly swollen 

 at the base, and distinctly curved on the basal third. • 



Hub. Muong You, Luang Prabang, November 13; 1 $ . 



Very nearly related to M. mindanaensis. Baker, but seems 

 to be paler in colour, the first tergite seems to be somewhat 

 more slender, there is no median carina on the third tergite in 

 the present species, and the hind calcaria seem to be some- 

 what shorter. Tro//or/iogas,(Jc\.in. (1905), mu^t, I think, sink 

 aa a synonym of this genus. 



Subfamily Macbocentrinje. 



Macrocentrus tricoloratus, sp. n. 



5. Nigra; mandibulio, apice excepto, palpis, clypeo, orbitis, pro- 



