238 Mr. E. Saunders' Si/nopsis of British 



Hah. — Glanvilles Wootton, Dorset ; Bristol, York- 

 shire, &c. 



12. pc.ctinipcs, V. d. Lind. Nouv. Mem. Acad. Briix. iv. 

 p. 351. 



Like gihhus in colour and size. Head and thorax 

 covered with an extremely fine glossy puhescence, which 

 gives them a silvery appearance in some lights, and in 

 others appears more or less brown ; head narrower than 

 in gihhus, in proportion to the thorax, and the antennae 

 shorter and stouter ; prothorax arcuately emarginate 

 posteriorly, not angulated ; abdomen with the base of the 

 1st, 2nd, and 3rd segments covered with a sort of glaucous 

 bloom. The ^ differs in having the prothorax arcuate 

 posteriorly like the $ , and the apical segment of the 

 abdomen beneath with a central carina uniting at the 

 base with two lateral ones, 6tli segment deeply notched, 

 5th entire. 



Length 6 — 9 mill. 



Not a common insect. Chobham, Deal, Southwold, 

 Hampstead, Southend, &c. 



I have followed Wesmael and Thomson in my 

 selection of a c? for this species. The (? assigned to 

 it by Smith is, I have no doubt, the ^ of chalyhcatus, 

 and in many respects seems to agree with the ? here 

 described, but Wesmael and Thomson have described 

 a 3- agreeing with pcctimpes ? in having the arcuate 

 posterior margin to the prothorax, and, although I have 

 never seen a British specimen with this character, I have 

 no doubt they are right in their selection ; chalyhcatus 

 <? has the posterior margin of the prothorax very dis- 

 tinctly angulated. 



The following species are unknown to me, so I quote 

 F. Smith's descriptions : — 



1. <iru))ii)iatus, Sm. Cat. Brit. Hym. p. 119. 



" (? (length 4 lines). Black, head very delicately punc- 

 tured, with a few larger scattered punctures ; the face 

 below the antennte covered with a thin silvery pile, the 

 labrum concealed, the antenna about the length of the 

 thorax, robust, and of uniform thickness, except the 

 apical joint, which is acuminate ; thorax very delicately 

 punctured, the metathorax much more strongly so, and 

 having, particularly at the sides, a silvery pubescence ; 



