242 f^P"'' 



Ptilium excavatum, Allibert. 



vice — Pt. canalicnlaium, Ericlison. 

 Ptilium myrmecopMlum, Allibert. 



vice — Pt. inquilimim, Ericlison. 

 Ptilium foveolatum, Allibert. 



vice — Pt. excavatum, Ericlison. 



Besides these alterations, the names of the following species may 

 be added to our list : — 



Trich. Chevrierii, Allibert. 



Among my old reserves, probably from Oxfordshire, I have found 

 two specimens of this species. It belongs to the same division of the 

 genus as T. dispar, i.e., with the thorax short, and the posterior angles 

 scarcely produced ; and may be known by its short and wide form, 

 the sculpture of its thorax, its castaneous colour, and long legs. 



Trich. lit t oralis, Thoms, 



Of this very remarkable species, one specimen was found by 

 Mrs. Matthews, near Grumley, in moss, February 7th, 1862 ; since then, 

 I have met with another, and four more have been taken by Mr. 

 WoUaston in Devonshire ; and I see, by the last number of this 

 journal, that Mr. Sharp records the capture of this species by himself 

 in Scotland during the last year. Eor my own part, I bad referred 

 our English examples to this species solely from the description in 

 p. 99 of Thomson's Skand. Coleop., Vol. I. ; and suppressed a notice 

 of its occurrence, which I had sent to the editors of this journal for 

 publication more than two years ago, expecting at that time a type 

 from M. Thomson, which has never yet arrived : I hope, however, 

 Mr. Sharp may have been more successful. 



Among all the known species of Trichopteryx, now exceeding 50, 

 T. littoralis presents the only instance of true punctuation, all the rest 

 having the surface of the thorax either smooth, or more or less 

 tuberculate. It has been separated from Triclioptert/x by M. Thomson 

 under the generic name of Pceocrara ; but, I think, without sufficient 

 reason, since the character on which he seems to found his genus, i. e., 

 the margined sides of tlie thorax, occurs, to a greater or less extent, in 

 very many other species. It is, however, only fair to add, that I have 

 not yet examined the organs of the mouth ; perhaps, when this is done, 

 I may find reason to alter my opinion. I do not think the alteration 

 of the specific name, fmggcstcd by Mr. Sharp, will be at all necessary ; 



