PTINID.E. — PTILINUS. 331 



Sp. 2. ater. Niger opacus, holosericeo-pubescens, antennis nig)- is, tibiis tarsisque 



solum testaceis. (Long. corp. I3 — 2 lin.) 

 Ph. ater. Panzer.— Xi. ater. Steph. Catal. 139. No. 1411. 



Dull black, with a short silken pubescence : head distinctly punctate, with an 

 evident frontal carina: thorax finely punctured, with the lateral margins ex- 

 panded: elytra as in the foregoing, punctate-striate, with the interstices 

 punctured, and the lateral margin sinuated : body beneath and femora pitchy . 

 tibiae and tarsi rufo-testaceous : antenna? black. 



The only example I ever found of this insect I caught upon 

 some old palings at Hertford, in July, 1826 : — it has, I believe, been 

 found in Norfolk. 



Genus CCLI. — Ptilinus, Fabricius. 



Antennce inserted before the eyes ; the basal joint elongate, bent : the second 

 short, nodose; the remainder pectinated in the males, serrated in the females; 

 the radii in the males subclavate, and in the females acute. Palpi filiform, 

 with the terminal joint conic-acute: head broad, deflexed 5 eyes large: thorax 

 subglobose : body elongate, subcylindric : legs slender. 



The Ptilini — which differ from the preceding and following 

 genera, by the structure of their antenna?, and the form of the 

 thorax and abdomen — like the Anobia, perforate and destroy old 

 trees and wood, making round deep cylindric holes therein, 

 especially attacking the trunks of old willows. 



Sp. 1. pectinicornis. Nigro-fuscus, antennis pedibusque pallide testaceis, elytris 

 brunneo-testaceis, vix costatis, thorace subgloboso antice Integra. (Long. corp. 

 li-2ilin.) 



Ptinus pectinicornis. Linne. — Don. x. pi. 326.— Ptil. pectinicornis. Steph. 

 Catal. 139. No. 14,12. 



Opaque, fuscous-black : head punctured: mouth testaceous: thorax very con- 

 vex, subglobose, somewhat granulated, the anterior margin reflexed, but not 

 emarginated : elytra narrower than the middle of the thorax, very convex, 

 fuscous or pale testaceous, irregularly punctate, the punctai somewhat dis- 

 posed in striae towards the margins : body beneath piceous : legs pale testa- 

 ceous, with the femora sometimes dusky at the base ; antenme pale testaceous, 

 with the radii considerably elongated in the males. 



Very variable in size and colour: but known from the following by the almost 

 total absence of the costac on the elytra and the integrity of the anterior 

 margin of the thorax. 



