HYMENOPTERA FROM BORNEO. 19 



before the transverse basal. Transverse median nervure in 

 hind wings broken below the middle. Median segment with 2 

 transverse keels ; its spiracles small, longish oval. Hind legs 

 not unusually long, the basal joint of the hind tarsi as long as 

 the following 4 united the fore tibiae compressed at base. Apex 

 of clypeus transverse, depressed obliquely ; the apex bordered by 

 a keel which curls round the sides, where it is more distinct. 

 Apex of mandibles with 2 equally-sized teeth, clearly separat- 

 ed. Labrum large, projecting. Parapsidal furrows distinct 

 to shortly beyond the middle. Basal half of mesosternum 

 bordered by a curved furrow. Scutellum not prominent, not 

 margined. All the claws are simple, not toothed. Ovipositor 

 about one third of the length of the abdomen ; it issues from 

 the apex of the 5th segment ; the 6th and following segments 

 are cleft in the middle to receive it ; there is no prominent, 

 cultriform hypopygium. Temples short. Fore tibiae short, 

 stout, broadly, distinctly narrowed at the base ; the hind coxae 

 are more than twice longer than thick ; the fore tibiae have 

 one, the posterior four have 2 moderately long spurs ; the 

 legs are slender and, except as regards the fore tibiae, are form- 

 ed as in the cryptince. The 1st abdominal segment is roundly 

 curved at the base ; its sides are keeled above and below ; the 

 spiracles are placed before the middle. 



The only group in which this genus can be placed is the 

 Acoenitini ; the form of the .1st abdominal segment and the 

 position of its spiracles separate it from the Cryptince, with 

 which it has a considerable resemblance. It has the inflated, 

 Contracted at the base, tibiae of the Xoridini, but not the 

 characteristic head of that group. On the other hand it has 

 not the ploughshare-shaped, prominent hypopygium of the 

 Acoenitini. So far as the alar neuration is concerned it is as 

 in the Cryptince, as e.g. in Mesostenus. The legs are shorter 

 and more slender than in the Acoenitini. For the present I 

 leave it in that tribe. 



V Xoridesopus annulicornis, sp. nov. 



Black, the sides of the face, the orbits all round, the band 

 on the outer side becoming gradually widened below, the sides 



ft. A. Hoc,, No, 48, 1907, 



