NEW BRITISH SPECIES, ETC., IN 1863. 33 



English description of the species in question do not agree, 

 and that in a most important part, viz., the decided rounding 

 of the hinder angles of the thorax. 



A. hrunnea differs from rufocincta as follovrs : it is smaller 

 and less robust, the joints of the antennae are more slender, 

 the legs shorter and more slender, the tarsi especially being 

 shorter ; the thoi-ax is not so ample, having the anterior 

 angles rather more acute, the posterior angles contracted 

 behind, and decidedly rotundate, the basal foveas not so 

 deeply punctured, and the reddish edging more evident, 

 especially on the hinder margin ; the scutellum is rather 

 deeper, and not quite so broad, the elytra are more parallel, 

 and not so acuminate behind. 



2. Trechus obtusus, Erichs. CoL March. 122,4; Put- 

 zeys ; Redt. ; Thoms. Skand. Col. i. 21 1, 6 ; Schaum, 

 Er. Ins. Deutschl. 641, 9; G. R. Waterhouse, Proc. 

 Ent. Soc. 4 May, 1863, Zool. 8615 (1863) ; T. J. 

 Bold, Zool. 8652 (1863). 

 IcBvis (Waterhouse, MSS.), Steph. 111. et Mand. 

 castanojjteruSj Heer, Faun. Helv. 120, 7. 

 This species (long known to Mr. Waterhouse, and briefly 

 described in the 5th vol. of Stephens' III. Mandib. and in 

 the Manual under the MSS. name IcBvis given to it by him) 

 is closely allied to T. minutiis, from which it may be distin- 

 guished by its shorter elytra, more convex and ovate form 

 (the broadest part being in the middle, whilst in T. mimitus 

 the elytra are broadest behind the middle), and nearly ob- 

 literated striffi, the three nearest the suture onlv beins: distinct. 

 It is also generally darker in colour, and apterous, or rather 

 possesses only the rudiments of wings. 



In minutus the wings are ample, and there are at least 

 four distinct striae on each elytron. 



1864. D 



