284 Mr. E. Saunders' Sipiojms of British 



ILih. — Generally distributed and common. The widely 

 sulcate face will distinguish this species from any of its 

 allies. 



5. puhcscens, Shuck. Foss. Hym. p. 165. 



<? like a small Icucostouta, but with the face not sul- 

 cate ; the head and thorax rather more hairy ; the 

 metathorax smooth at the base, and sulcate down the 

 middle, " irregularly rugose at the sides ; anterior and 

 intermediate femora and tibiae piceous in front. 



Length 7 mill. 



Hah. — Charlwood, Surrey, 1 ^ ; and 1 ^ from Shuck- 

 ard's collection. I do not know the $ . 



6. cetratiis, Shuck. Foss. Hym. p. 131. Fig. H. Schiiff. 



Faun. Germ. 179, 2, 3 (dilatits). 



Black, shining ; the calcaria and the margins of the 

 dilated anterior tibise of the <? pale. Head and thorax 

 punctured, rugosely so in the 3" ; clothed with short 

 erect hairs ; metathorax crenate at the extreme base ; 

 finely and diagonally rugose in the <? and clothed with 

 whitish hairs ; nearly smooth, and somewhat shining 

 in the ? ; in both sexes with a narrowly impressed line 

 down the centre ; abdomen shining, the extreme apex 

 in the ? piceous; apical segment in the ? acuminate, 

 with a sharp carina on each side above, and clothed at 

 the sides with erect hairs ; posterior tibiae with short 

 spines ; anterior tibiae in the g- dilated and widely 

 rounded on their outer margin, which is pale, somewhat 

 membranous, and ciliated ; 1st joint of the front tarsi in 

 the (? also dilated. Length 7 — 8 mill. 



Hah. — London district, Weybridge, Bristol, and La- 

 nercost in Northumberland ; rare. 



The 3" is distinct from all the species by the front 

 tibiae ; the ? can only be confounded with leiicostoma, 

 from which the narrow central line of the less shining 

 metathorax will easily separate it ; in leiicostoma. the 

 central impression is a distinct excavation, with a sharp 

 margin on each side. 



7. iwdafiriciis, V. der Lind. Nouv. Mem. Acad. Brux. 



V. p. 62. 

 Black ; the scape of the antennae in front, the anterior 

 and intermediate femora in front in the 3 , and the 



