SPHEGID.E. 109 



ceding species, but differing considerably in shape and 

 sculpture, surface exceedingly finely rugulose, head and 

 mesonotum dull, distinctly and very closely punctured, 

 basal area of the propodeum finely striated, with a wide 

 central sulcature, sides beyond the area rugosely punctured, 

 wings with a smoky spot across the marginal and second 

 submarginal cells ; abdomen shining, very finely and 

 closely punctured, basal segment narrow, constricted at the 

 apex, its sides rounded, a spot on each side near the apex 

 yellow, second segment more than twice as wide as the 

 first, crenate at the base, with a wide curved sub-apical 

 yellow fascia, third segment with a narrow yellow apical 

 band. 



L. 11 mm. 



Rare. London district ; (ShucharcT). New Forest ; {Cur- 

 tis). Woking; {Morice). Colchester; {Harwood). Bick- 

 leigh, near Plymouth ; {Bignell). Land's End ; [Marquniid). 



NYSSON, Latr. 



The two spines on the propodeum and the petiolated 

 second submarginal cell at once distinguish the species of 

 this and the following genus from all their allies ; the 

 present genus may be distinguished from Bidineis by the 

 robust form of the species and their dull punctured surface, 

 the short transverse propodeum, and the short pronotum. 

 The genus is widely distributed ; Handlirsch says cos- 

 mopolitan. I can gather no information as to the habits of 

 the species, except that N. intcrruptus has been bred fi'om 

 decayed wood by Mr. Bignell. Four occur in this country, 

 and Handlirsch in his monograph enumerates sixty-four, of 

 which twenty-three arc Palaaarctic. 



(G) 1. Second segment of the abdomen (viewed 



sideways) miicli deeper than the first, and 



strongly anguUited at its base ventrally ; 



abdomen black and yellow. 

 (5) 2. Posterior nerve of hind wings uniting with 



