206 



1900, when Mr. XevinsoD sent me some specimens to name from 

 Criccietb, N. Wales ; he has taken it also at Barmouth and Towyu, 

 where it evidently occurs regularly, as this year again specimens 

 have been taken at Criccieth by Mr. Nevinsou and Mr. W. Gardner. 

 Col. Yerbury took the J at Llambedr in July, 19U1. Curtis' speci- 

 men came from Ambleside, Westmoreland, and there is a $ in the 

 National Collection mixed with inermis from Perthshire. 



It is a very distinct species ; the 9 could only be confused with either pili- 

 cornis or inermis, from either of which it may be known by its narrower form, the 

 much shorter and less conspicuous clothing of the head and thorax, and the steel- 

 blue not black abdomen. 



The c? resembles the ^ of ccerulescens or leaiana, but it has the posterior 

 metatarsus very slightly dilated from about the middle, which bears on its under-side 

 a distinct tooth that projects and is distinctly visible beyond the hairs of the under 

 surface ; this character and the dull propodeal area at once distinguish it from 

 coerulescens, and the dull area and the much more developed metatarsal tooth from 

 leaiana. 



Osmia inermis, Zett. = parietinn, Smith. Saund., &.Q., nee. Curtis. 



This change in synonymy is necessitated by the alteration of the 

 name of the last species. 



An error occurred in " Hym. Acul. Brit. Isles," p. 73, in the 

 table of Agenia. " Metanotum " should read " Propodeum." 



St. Ann's, Woking : 

 August 6th, 1906. 



HELP-NOTES TOWARDS THE DETERMIXATIOX OF BRITISH 

 TENTSREDINID^, &c. (15). 



ET THE BET. F. D. MORICE, M.A., F.E.S. 



SEMATIDES {continued) = PACMTSEMATU6, Knw. 



Pachynematus, Knw., differs from all our normal Xematides, 

 except the very dissimilar Micronemafus, in combining the characters 

 of an excised elypeus and claws with suhapical tooth. 



As far as I know, we have thirteen British species of the genus ; 

 one of which, however — viz., 2;^(/(/(7c^i, Knw. -I can only record as 

 British on the authority of Konow's statement in his Revision of 

 Pachynematus (1903 — 190i), " mir aus England bekannt," although I 

 have a strouii impression that it was once sent to me for determination 

 by a correspondent, but by whom and when I cannot remember. 



