112 HYMENOPTERA ACULEATA. 



apical joint of antennijo in the $ twice as long as the 

 penultimate, bisinuate beneath ; propodeum clathrate above 

 with silvery hairs at the sides, its lateral spines short, the 

 basal area longitudinally rugose ; abdomen punctured, more 

 largely towards the base, pygidial area of the $ rugosely 

 punctured, apical dorsal valve of the $ bidentate ; second 

 ventral segment not angularly produced at the base in 

 either sex. 



L. 7 mm. 



Not rare. Woking ; Chobham ; Hay ling Island ; Little- 

 hampton ; Hastings. Lulworth j Knighton; Exmouth ; 

 (Bale). Norfolk; (Bridgman). Hampstead ; Highgate ; 

 Weybridge; Barmouth; (Smith). Land's End; {Mar- 

 quand). 



DIDINEIS, Wesm. 



Somewhat like a red-bodied Pompilus in appearance, but 

 allied to Gorytes in the dilated pul villi of the anterior feet, 

 and the structure of the thorax ; the apical joint of the 

 antenna in the c? is falciform ; the pronotum in both sexes 

 is somewhat elongate and convex, so that a distinct im- 

 pression separates it from the mesonotum ; this latter is 

 considerably wider than the pronotum; propodeum elongate, 

 horizontal, parallel-sided, its apex truncate, the angles of 

 the truncature with a short spine ; wings with the second 

 submarginal cell petiolated ; abdomen ovate ; apical dorsal 

 valve truncate in the S , with a distinct pygidial ai-ea in the 

 $ ; posterior femora with an apical tooth beneath ; tibiie 

 simple, not spinose. 



Handlirsch, in his monograph of Nysson, &c., enumerates 

 six species, of which four are Palsearctic, and two Nearctic. 



The habits of the genus are not known. 



D. lunicornis, Fah. {Kennedii, Curt.). — Black, man- 

 dibles in both sexes, and the clypeus and base of the 

 antennss anteriorly in the ? , the basal segments of the 

 abdomen in both sexes, and the legs more or less, red ; 



