Hetenxjijiui and Fossorud Hymenoptera. 259 



Pemphredon, Latr. (PL VIII. tig. 27). 



Hist. Nat. vol. xiii. p. 325. 



= Cemonus, Jur. 



Tliis genus contains three of our commonest British 

 species ; they are much larger than any of the pre- 

 ceding, and may be easily recognised by the hairy head 

 and thorax ; the vertex of the head in the ? is very large 

 and square, in the ^ the sides of the head behind the 

 eyes converge considerably ; the abdomen has a long 

 petiole, and the posterior tibite are more or less irregularly 

 spinose. 



(■i) 1. 1st subniarginal cell receiving botli recurrent ner- 



vures. 

 (;>) 2. Smooth space on the metathornx narrowly luuulate, 



its posterior margin well defined . . . . . . luiicolor 



(2) ;f. Smooth space on the metathorax widely lunulate, 



its posterior margin not defined . . . . . . lethiffi: 



(1) 4. 1st and 2nd submarginal cells each receiving a 



recurrent nervure . . . . . . . . . . lugulris. 



1. lugiihris, Fab. Ent. Syst. ii. p. 302 = hictKosKs, 

 Shuck. Fig. Panz. Faun. Germ. 52, 24 (unicolor). 



Entirely black ; head rugosely punctured, and covered 

 with long hairs ; vertex with its sides converging towards 

 the base in the <? , quadrate in the ? ; mesothorax and 

 scutellum rugosely punctured and hairy ; metathorax 

 rugose and covered with long hairs, with a semicircularly 

 raised brow, which is not so coarsely rugose as the rest 

 of the surface ; petiole of the abdomen looked at from 

 the side curved, above rugose, with long hairs above and 

 beneath, rest of the abdomen shining, with long hairs at 

 the base and apex, and on the under side ; femora 

 densely covered with hairs ; tibiae in the ? with irre- 

 gular and occasional sjiines externally, densely covered 

 on the side towards the body with short adpressed 

 hairs. 



Length 9—12 mill. 



Hah. — Very common and generally distributed. 



Var. Inctuosa, Shuck., is a var. of the <? with the 

 raised portion of the metathorax more or less shining 

 and smooth. 



TRANS. ENT. SOC. 1880. — PART IV. (DEC.) 2 C 



