96 HYMENOPTERA ACULEATA. 



more extensive in the $ ; in the ? the anterior tarsi are 

 piceous; the surface of the head and thorax is moderately 

 shininc and finely punctured, the intervals between the 

 punctures rather strongly aciculate, transverse impression 

 in front of the scutellum simple in the ? , or with one or 

 two transverse costae in the c? , laut not regularly costate as 

 in tristis ; abdomen less finely punctured than in minutus, 

 the apical dorsal valve in the ? narrower, with more re- 

 flexed edges. 

 L. 5-7 mm. 



Widely distributed, although not recorded from many 

 localities. Woking ; Deal ; Hayling I. ; Southwold. Bury 

 St. Edmunds ; (TT^. H. Tuck). Exeter ; {Parfitt). Norfolk ; 

 [Briclgman). Gloucestershire; {PerJdns). Niton; Sand- 

 wich ; {Marshall). 



D. tristis, V. d. Lind. — Larger than either of the pre- 

 ceding ; S with the surface of the head and thorax shining, 

 not aciculate, but much more coarsely punctured than in 

 minutus or luperus ; tubercles in part, and tegulte pale ; 

 anterior tibia9 in front, the tarsi, and the base and apex of 

 all the tibiaa pale. 



? almost as large as Pemphredon Shuckardi j entirely 

 black, except the calcaria, and occasionally the base of the 

 tibife and the basal joint of the tarsi, which are piceous ; 

 mesonotum shining, remotely punctured on the disc, closely 

 in front, among the punctures are some slight, very 

 irregular longitudinal strife, transverse impression in front 

 of the scutellum with strong transverse costje; apical 

 dorsal valve of abdomen wider than in luperus, its sides 

 less raised, very largely punctured, sometimes with its 

 extreme apex piceous. 



L. 6-9 mm. 



Generally distributed, and usually common. 



