Heterogyna and Fossorial Hymcnoptera. 279 



wide. The pmictiiration of the thorax is finer, and the 

 body rather more shining. 

 Length 8—9 milL 



Not rare. Chobham, Bristol, Eeigate, &c. Appears 

 in May and June, and may be bred from pierced bramble 

 stems. 



Entomognathus, Dahlh. 

 Hym. Eur. vol. i. p. 295. 



Differs from Crahro in having the eyes hairy, and the 

 mandibles sinuate near the base. 



1. brevis, V. d. Lind. Nouv. Mem. Acad. Brux. v. p. 72. 



Black ; scape of the antenna in front, dilated portion 

 of the mandibles at the base in the S' , the tubercles, the 

 anterior and intermediate tibiae and tarsi in both sexes, 

 and the femora except a black line beneath in the 3" , 

 the posterior tibite at the base in the ? and almost 

 entirely in the c? , and the posterior tarsi in the <? , 

 flavous ; apices of the anterior femora yellow in the ? . 

 Head and thorax shining, rather largely punctured, 

 covered with short erect hairs ; mandibles dentate at the 

 base ; eyes clothed with fine white hairs ; basal area of 

 the mctathorax shining, surrounded and divided down 

 the middle by consute impressions, sides finely pilose ; 

 abdomen finely punctured, the posterior margins of the 

 segments narrowly piceous, apical segment piceous ; pos- 

 terior and intermediate femora denticulate and spinose. 



Length 5 — 6 mill. 



Hah. — Common in most places. May be known at 

 once from any of the black species of Crahro, some of 

 which it much resembles, by the hairy eyes and dentate 

 mandibles at the base. 



Crabro, Fah. (PI. Vin. figs. 45, 46). 



Syst. Ent. p. 373. 



This genus contains a number of species which vary 

 exceedingly in form and colour, but the neuration of the 

 wings is constant throughout. The front wings have one 

 distinct submarginal and one distinct discoidal cell, 

 without indications of further nervures. The only other 

 genus that I have adopted, which has similar neuration, 

 is Entomo(j)uit}ius, which is characterised by its hairy 

 eyes. 



