10 TENTHI1EDINIDJ5. 



in T. lucorum, with reddish-brown nervures ; .stigma blackish ; hind 

 margin dusky and well defined. 



Hah. Northern and Central Europe. 



a-n. S 2 • Britain J. F. Stephens. 



u, p. 2 • Britain. 



q, r. $ . Coombe Worn I. 



s. 2- (Type of species.) Coombe Wood. W. E. Leach. 



t-aa. $ 2- Perthshire. Mr. Foxcroft. 



lib. 2 • Europe. 



4. Trichiosoma vitellina. 



Tenthredo vitellina, Linn. Faun. Suee. p. 389 (1761). 



Trichiosoma laterals, Leach, Zool. Misc. iii. p. 109 1 1817); Curt Brit. 



Ent. I pi. xlix. (1824). 

 Cimbex vitelline Zadd. Schrift. Konigsb, iii. p. 259 i 1862). 

 Cimbex Lateralis, Vollenh. Tydsch. Ent. vi. p. 65, pi. i\. i L863). 

 Trichiosoma salicis, Hart. Stett. ent. Zeit. i. p. 19 I L840). 

 Cimbex villosus, Motsch. Bull. Mosc. xxxix. p. 499 (1859). 



Hab. Northern and Central Europe, North Asia. Western 

 America. 



a-f. d $. Britain. J. F. Stephens. 



V '■ S ■ (Type of T. laterak.) Darenth Wood. W. E. Leach. 



h. 2- Devonshire. J. F. Stephi 



i, k. tf 2 • Versaill 



1-n. 2 • ' (many. I [err J. F. Ruthe. 



o. S. Europe 



p. d . Vancouver's Island. Dr. Lyall. 



(j. 2 • Rocky Mountains. Entomological Club. 



5. Trichiosoma arcticum. 



(Plate I. fig. 7.) 



F Trichiosoma lucorum, Kirb. Faun. Bor.-Amer., Ins. iv. p. 256 (1837). 



Exp. al. 1 poll. 3 lin., long. corp. S lin. 



Allied to T. lucorum : differs from T. triangulum in the shorter, 

 broader, and more obtuse abdomen. Black, with a slighl purplish 



tinge; head, thorax, base of abdomen, and femora clothed with long 

 grey hairs; abdomen above with a shorl erecl grey pile. Antenna' 

 wanting; mandibles and last segment of the abdomen beneath 

 reddish; femora and extreme base of the tibiae blue-black ; tibiae 

 and tarsi rufo-testaceous. Wings rather short, smoky yellow : the 

 tip of the fore wings very slightly clouded, nervures yellowish or 

 mahogi i ny-brown. 



Hal. Arctic America. 



a. £ . (Type of species.) Fori Simpson, Mackenzie Sir J. Richardson. 



River, 62 c N. lat. 



