84 HYMENOPTERA ACULEATA. 



tured like the rest of the mesonotum, propodeum with a 

 raised central line and a series of divergent rugosities 

 extending from its base, sides of the thorax and the apices 

 of the abdominal segments laterally clothed with silvery 

 liairs, abdomen jDunctured, legs clothed with silvery hairs 

 beneath. 



L. 4-6 mm. 



Chobham ; Woking ; on sandy commons ; not rare but 

 difiScult to catch. Coombe Wood; Sandhurst; Weybridge. 

 It provisions its nest with a small white-bodied spider, 

 which is found commonly on heath (Sviit.h). 



This is evidently not the hicolor of Contiaental authors, 

 'of which Kohl describes the mesopleurse as " densissime 

 punctatse," which they certainly are not in the British 

 species ; the Continental species is also larger, and the 

 abdomen in the ? has often three segments at the base red, 

 and that of thcc? two. I feel little doubt that it is Dahl- 

 bom's concolor. 



M. marilimus, Smith. — Entirely bronzy black in both 

 sexes, and further distinguishable from concolor by the 

 impressed line which runs from the ocelli to the insertion 

 of the anteunEB, and by the somewhat longer propodeum ; 

 the ? may be also known by the intensely fine close punc- 

 turation of the head, and both sexes by the duller, more 

 deeply punctured mesopleuras. The face in the ? is very 

 decidedly bronzy. 



L. 4-6 mm. 



Eare. The only locality I know for it is on the Deal 

 sandhills, where it has been taken by Mr. F. Smith, the 

 Rev. F. D. Morice, and myself. 



TRYPOXYLON, Latr. 



This genus may be easily known by its long narrow 

 abdomen and the peculiar neuration of the wings. The 

 mandibles are simple, the eyes deeply sinuate on their 



