SPHEGID^. 91 



wings hyaline, nervures piceous, stigma very large, black, 

 mesopleura) rugose on their upper half, propodeum rugose, 

 ■with three raised longitudinal lines and transversely rugose 

 between them ; abdomen very smooth and shining, its 

 petiole rugose and longer than the rest of the first segment ; 

 posterior tibiae with two or three spines. 



L. 4-6 mm. 



Not very common. Chobham ; Tunbridge Wells. London 

 District; {Smith). GlanvillesWootton ; Portland ; (DaZe). 

 Rugby; (Morice). Norfolk; (Bridgman). Gloucester; 

 (V. E. Perkins). Bridgenorth ; {Marshall). 



PEMPHREDON, Latr. 



(Cemo»us-, Jur. Ceratophorus, Shucl:.) 



The species of this genus are very closely allied and 

 difficult to distinguish from one another ; they can be 

 separated from those of either of the preceding genera by 

 the presence of a second recurrent nervure, from Mimesa 

 and Psen in having only two submarginal cells, and from 

 the other allied genera by the long hairs on the head and 

 thorax ; tbe petiole of the abdomen, as in the surrounding 

 genera, is formed of the ventral plate only of the first 

 segment and is of considerable length, generally as long or 

 longer than the rest of the segment. I have followed Kohl 

 and Thomson in uniting Ceraiophorus with this genus. The 

 species provision their nests with Aphides ; the larvEB spin 

 no cocoon. 



(8) 1. Face between the antennce simple. 



(3) 2. Each submarginal cell receiving a recurrent 



nervure (Sul)g. Pemphredtm, Latr.) . . lugudris. 



(2) 3. First submarginal cell receiving both recur- 

 rent nervures (Subg. Cemonits, Jur.). 



(5) 4. Smooth space on the propodeum widely lunu- 

 late, its posterior margin not strongly 

 defined; apex of the clypeus in the ? scarcely 

 produced in front, not raised . . . LETriiFER. 



(4) 5. Smooth space on the propxlenm narrowly 



lunulate ; its posterior margin strongly 



