76 COLEOPTERA. 



smaller, and differently shaped ; the thorax, moreover, being 

 simply emarginate in front, instead of bisinuate. 



49. Heterocerus ARENARius, Kies., Germ. Zeits. f. Ent. 



iv, 284; G. R. Crotch, Cat. Brit. Col. ed. 2. 

 Mr. Crotch (Entomologist, No. 31, p. Ill) notes that this 

 species was long ago introduced as British by Mr. Haliday, 

 in the "Natural History Review," but that this fact has 

 apparently hitherto escaped notice. In a recent communica- 

 tion, however, from the former gentleman, he expresses very 

 much doubt about the correctness of this introduction, as his 

 Irish specimens of the so-called arenaj^us do not differ sub- 

 stantially fromfemoralis, Kies. (flexuosusj Wat. Cat). 



50. Parnus nitidulus, Heer, Faun. Col. Helv. i, 467, 



16 ; Er., Ins. Deutschl. iii, 516, 8 ; D. Sharp, Proc. 

 Ent. Soc. 19 Nov. 1866. 



A single specimen of this insect was taken by Mr. Sharp 

 at Aberlady, near Edinburgh, in July last. 



According to Erichson it can easily be confused with a 

 light coloured form of P. auriculatus, but it is to be distin- 

 guished from that species not only by its colour (it is clothed 

 with golden-silky pile, and has red antennae and legs), but 

 by the lesser convexity of its thorax, and the want of any 

 trace of striae on the elytra. 



51. Macronychus 4-tuberculatus (Frontisp., fig. 2), 



Miill., 111. Mag. v, 215, 1 ; Er. Ins. Deutschl. iii, 



536, 1 ; G. R. Crotch, Cat. Biit. Col. ; E.W. Janson, 



Proc. Ent. Soc. 19 Nov. 1866. 



A single specimen of this most interesting addition to our 



fauna (a genus, moreover, new to us, and conspicuous for its 



minute six-jointed antennae) was taken by Mr. J. T. Harris, 



