262 Mr. Cameron on 



than the length of the third antennal joint and by fully its 

 length from each other ; eyes a little converging towards 

 the clypeus. Flagellum rufous beneath, fuscous above ; 

 the third and fourth joints sub-equal. Clypeus flat, the apex 

 a little projecting and armed with four stout, blunt 

 teeth. Pronotum rounded at the sides and with an oblique 

 slope in front. Mesopleural furrow indistinct Trigonal 

 area smooth, impunctate, shining ; the central furrow 

 narrow, metapleurae at base strongly striolated ; black 

 above ; the rest reddish, the extreme apex of the median 

 segment being also reddish. Petiole rufous, broader than 

 long ; the base oblique. Pygidial area reticulated ; narrowed 

 almost to a point at the base ; the apex transverse. Incision 

 in hypopygium not reaching to the middle, longer than 

 broad, rounded at the base. The basal ventral segment is 

 entirely rufous ; the others are broadly rufous in the middle. 

 Wings almost hyaline, the apex infuscated ; the second 

 cubital cellule arched, receiving the petiole almost in the 

 middle ; the recurrent nervure received a little before the 

 middle of the cellule. Legs rufous in front, more or less 

 whitish-yellow beneath ; the hind tibiae fuscous behind, the 

 hind tarsi for the greater part fuscous. Length 6 — 7 mm. 



The $ is smaller and similarly colored, but with the 

 yellow marks more reduced ; the clypeus slightly convex ; 

 the apex transverse, except that a short, not very distinct 

 tooth projects in the middle. The femora are broadly 

 lined with black laterally and above, especially the anterior 

 four. 



A well-marked species. 



Cerceris pentadonta. (PI. X., f. 13, a,b.) 



Eyes almost parallel. Ocelli in a triangle, the hinder 



separated from the eyes by nearly the length of the second 



and third antennal joints united, and from each other by less 



than the length of the third. Lobe of clypeus obliquely 



