20 Cameron, Hymenoptera Orientalicx. 



received in the middle. Abdomen black ; the sides and 

 apices of the segments and the ventral surface yellowish. 



ETHA L.EVIFRONS, Sp. 710V. 



Long. 15 ; terebra 5 mm. $. 



Agrees closely in form, size, and coloration, with 

 E. stratifrons ; may be known from it by the front being 

 smooth, not striated, by the mesonotum being alutaceous, 

 not punctured, by the pronotum being entirely black, by 

 the scutellum being more widely yellow, the oblique base 

 only being black, and by the apex of the median segment 

 being not so strongly punctured, being almost smooth, 

 and it bears distinct teeth on the sides. 



Head black ; the face, clypeus, labrum, mandibles, 

 palpi, a large mark, triangularly narrowed on the lower 

 side, on the inner orbits above, and the lower orbits on 

 the outer side, yellow ; the front and vertex have a 

 plumbeous hue, and are smooth and shuiing ; the front 

 is depressed in the middle ; the lower ocellus is surrounded 

 by a deep furrow ; the inner orbits are sharply margined. 

 The face is closely punctured, thickly covered with white 

 hair ; the cl}'peus is sparsely punctured. Thorax black, 

 with a distinct plumbeous hue that is less distinct on 

 the mesonotum, which is dull in tint and thickly covered 

 with short, pale pubescence ; the furrows distinct, smooth. 

 Scutellum yellow, except at the base, and covered with 

 longish pale hair ; post-scutellum smooth, yellow, black 

 and largely bifoveate at the base ; the lateral depression 

 strongly striated at the apex. The basal region of the 

 median segment smooth ; the basal transverse keel is 

 narrowly bent backwards in the middle ; the second is 

 more broadly bent backwards ; between the two keels on 

 either side of the middle are some transverse keels which 

 become gradually longer ; the second keel becomes raised 



