26 Cameron, Hymenoptera Orientalia. 



except at the apex ; the apex is rounded ; down the 

 middle is a straight stout keel ; across the middle a stout, 

 transverse one, at the side of this are two short, curved, 

 irregular keels; at the apex itself there is, on each 

 side, a stout, oblique keel. The base of the propleurse 

 distinctly aciculated ; in the centre of the mesopleuras is 

 a wide, moderately deep, oblique depression. Legs black ; 

 the apex of the anterior coxae white ; the anterior knees, 

 tibiae and tarsi pale testaceous ; the apex of the posterior 

 coxae, the apex of the trochanters and a broad band near 

 the apex of the tibiae, testaceous ; the extreme apex of 

 the hinder femora and its large tooth, piceous. Wings 

 hyaline, but with a faint fuscous tint ; the nervures 

 fuscous ; the recurrent nervures interstitial ; abdomen 

 shining, impunctate ; the maculae large, pallid yellow. 



A very distinct species from A. amndipes, being 

 readily known from it by the red collar, and by the 

 absence of a fascia in the anterior wings. 



DiODONTUS GENICULATUS, Sp. nov. 



Niger ^ nitidus, segmento mediano striolato; mandibulis 

 tegulisque flavis ; bast tibiaruni testaceo ; alls hyalinis, 

 nervis fuscis, stigmate nigro. % 



Long. 4-5 mm. 



Hab. Mussooree, 6,000 ft. {Rothney). 



Comes near to D. striolatus Cam. from Lahore (^Man- 

 chester Memoirs, xli., p. zp), but readily separated from it 

 by the pro- and meso-pleurae not being striated, by the 

 four hinder tibiae being black, except at the base, and by 

 the strongly transversely and longitudinally striolated 

 median segment. 



Head large, wider than the thorax ; almost shining, 

 bearing some shallow, not very distinct, punctures ; the 

 front and vertex with a sparse, microscopic black pile ; the 

 oral region with a silvery pubescence and with long, white. 



