274 ICIINEUMONID.E. 



tliorax very sliort, with long hairs ; areola strongly transverse, 

 petiolar area large and carinate througliout, apophyses conspicnous. 

 Scutellum strongly deplanate, scabrously punctate and subquadrate, 

 with the apical angles rounded; its base hardly discrete iroiu tlie 

 mesouotuni, its sides with long hairs and strongly bordered to 

 tlie apex which is, like that of the postsciitelluni, red. Abdomen 

 obeonical, dilated from base to apex, with tthite hairs and densely 

 j)iinctate, black, with the apex of the first, whole of second and 

 (excepting two basal dots) of the third segment, brick-red ; 

 basal segment coarsely punctate, petiolate to the prominent 

 central spiracles and thence parallel-sided to apex ; venter black, 

 with incisui'es flavesceut; hypopygium broadly rounded and 

 covering base of the stout but hardly exserted terebra. Legs 

 black, shining and slender ; tibiic and tarsi white, with the apical 

 two-thirds of the hind tibise, whole of their tarsi, and npical three 

 joints of the anterior pairs, black ; claws small and strongly 

 pectinate. Wivgs distinctly infumate and somewhat ample ; radix, 

 tegulse, and stigma infuscate ; nervures conspicuous. 



Letigth 16 millim. 



Assam : Shillong, 6000 ft., ix.03 (Rowland Turner-). 



Type in the British Museum. 



I have seen three females only. 



Tribe BASSIDES. 



This tribe appears to be very closely related to the PiMPLiis'iE 

 in its sessile and often coarsely sculptured abdomen, which is, in 

 the typical forms, very distinctly impressed in the same manner, 

 though transversely and not obliquely, as in the case of Gh/pta 

 and many Pinipla. It forms, however, an entirely homogeneous 

 group, at once distinguished from all other Trtphonin.5; by its 

 normal scutellum and apically bifid upper mandibular teeth ; the 

 peculiar conformation of the strongly deplanate and sessile basal 

 segment is also distinctive, and the general fncies is so peculiar 

 that, with a very little experience, it may be recognised at a 

 glance. 



Bfissus formed Gravenhorst's eighth gi'oup and ^\■as divided by 

 him fron) Metopius and the Pimplin^^ with convex abdomen on 

 account of its deplanate abdomen, with the basal segment flat and 

 parallel-sided ; in it he placed the genera Euceros, Orthocentrus, 

 and Bassus, of which the last two have the antennae not centrally 

 incrassate, and the latter differs from Orthocentms in its obviously 

 more slender legs ; from the remainder of the TRYP^o^fINyE these 

 three genera were said to differ in the entirely sessile abdomen. 

 In 1855 Holmgren discovered that in Gravenhorst's restricted 

 genus the upper mandibular tooth \\as apically cleft, while in all 

 other Tryphoniiis, except certain Metojnus, it is entire; hence he 

 erected a group for 1 he sole reception of this genus under the name 

 Tryphonides scui/odonti. Desvignes, wdio in 1862 described 



