268 Mr. Cameron on 



centre. Pronotum with a slight depression in the middle. 

 The sternum, median segment and pleurae sparsely covered 

 with long silvery hair. Petiole curved, longer than the 

 thorax. Abdomen shining, impunctate, glabrous. Pygidial 

 area shining, convex, keeled laterally. Legs covered some- 

 what thickly with white, glistening hair. The second cubital 

 cellule above (the nervures straight) is a little shorter than 

 the space bounded by the first recurrent and second trans- 

 verse cubital nervures and less than half the length of the 

 third cellule ; the recurrent nervures are received about the 

 same distance behind the transverse cubitals. The antennae 

 are pale fulvous ; the mandibles at the base pale testaceous, 

 black at the apex ; the legs (except the coxse) pale ferru- 

 ginous ; the posterior femora and tibiae a little infuscated ; 

 abdomen piceo-ferrugineous, infuscated in the middle. 



Psen erratiaiS) Smith (Proc. Linn. Soc. IV., p. 85), from 

 Celebes agrees closely in coloration with the species here 

 described ; but no details beyond color are given, and in that 

 respect it differs from nifiventris in having the nervures 

 and stigma pale ferruginous, not deep black as in our species. 



Hab. Madras (Rothney). 



PSEN CLAVATUS, Sp. nov. 



Smaller than P. rufiventris (8 mm. only) differing from 

 it in the eyes being rounded in front, diverging at apex, in 

 the antennae being distinctly clavate ; with the third joint 

 not twice the length of the second (in rufiventris it is three 

 times) and not much longer than the fourth ; in the third 

 joint being nearly twice the length of the penultimate ; in 

 there being no furrow behind the ocelli ; in the base of the 

 median segment being not depressed, and with three keels 

 down the central part, — one central and two lateral keels ; 

 the abdomen apart from the black petiole, is entirely rufous ; 

 the second cubital cellule is narrowed almost to a point at 

 the top : the head and thorax are more distinctly aciculate, 



