Genera and Species of Hymenoptera. 535 



Montezuma bisulcata, sp. n. 



Nigra, sparse albo-macuiata ; alis f usco-violaceis ; scapo antennarum 



basique mandibularum albo-maculatis. $ . 

 Long. 14-15 mm. 



Hab. Khasia Hills. Coll. Rothney. 



Scape of antennae sparsely and minutely punctured, yel- 

 lowish beneath. Front and vertex rugosely punctured, the 

 vertex more sparsely than the front; the part between the 

 antennas broadly carinate ; foveate above, a yellow mark on 

 either side of the fovea. Clypeus closely rugose, the apex 

 with scattered punctures ; depressed and roundly and distinctly 

 incised at the point. Mandibles with a small yellow mark in 

 the middle near the base, its lower side obliquely widened at 

 base and apex, the apical part being the longer. Thorax 

 black, except for an interrupted line on the pronotum and a 

 mark on either side of the apex of the median segment. 

 Pro- and mesonotum closely rugosely punctured ; the scu- 

 tellum,if anything, more closely, almost rugosely, punctured, 

 and with a shining line, gradually widened towards the apex 

 in the middle ; the postscutellum has the punctures, if any- 

 thing, more widely separated than on the scutellum ; its 

 centre is smooth and has an elongated shallow depression in 

 the middle. Pro- and mesopleurge coarsely rugosely punc- 

 tured, the punctures on the latter running into reticulations ; 

 the apex is alutaceous, impunctate. Metapleurge alutaceous, 

 the apex obscurely obliquely striated ; on the base are five 

 foveas, separated by stout keels, and having at the top a much 

 larger more elongated depression. Wings fuscous- violaceous, 

 the apical half of the posterior more hyaline. Legs black, a 

 line on the basal two thirds of the anterior tibia? in front and a 

 line on the base of the posterior behind yellow; the front 

 femora are similarly marked on the apical two thirds in 

 front. Abdomen black ; a line, interrupted in the middle, on 

 the apex of the petiole, and three lines on the apex of the 

 second segment, yellow. Petiole above closely rugosely 

 punctured ; a shallow indistinct furrow on the apex in the 

 middle above; the base sparsely covered with long white 

 hair ; the lower side is regularly and stoutly transversely 

 striated. The second segment is closely but not very deeply 

 punctured ; the third segment is slightly depressed and 

 punctured on the apex. 



The insect is covered with a pale pile. On the median 

 segment the central furrow is large and deep and is divided 

 into two parts by a transverse partition — a shorter basal, 



