410 Coleopte?'ological Notices. 



TRICIIOTOX Hope. 



On reading- the description given by Champion of the species T. 

 lapidicola and T. curvipes, there is very little reason for doubting 

 that our Blapstinus sordidus should also be referred to the same 

 genus. In T. sordidum the eyes are completely divided ; the genus 

 therefore belongs to the Blapstini and in no wise to the Opatrini, 

 where it was placed by Lacordaire. 



Trichoton is very closely allied to Blapstinus, resembling it in 

 nearly all details of structure, but departs widely therefrom in the 

 form of the anterior tibiae and in the nature of the vestiture. The 

 latter is of dual structure, consisting of finer, but still rather short 

 coarse and recumbent hairs, and longer erect and very robust bris- 

 tles, irregularly scattered in clusters on the elytra; these bristles 

 are very peculiar, as will appear below. The eleventh joint of the 

 antennas also differs in form. 



T. so I'd id ll ill Lee. — Blapstinus sord. : Ann. Lye. N. Y., V, p. 146. — 

 Oblong-oval, moderately convex ; integuments somewhat shining, piceous, 

 hut almost completely concealed hy the very dense ochreous-yellow vestiture, 

 which on the elytra is finely and confusedly mottled with patches of dark 

 brown bristles ; legs and antennae rufo-piceous. Head strongly transverse, 

 strongly rounded throughout anteriorly, the epistoma deeply sinuate in the 

 middle, somewhat finely but very deeply and densely punctate ; upper lobe 

 of eyes rather large, rounded ; antenna? robust, a little shorter than the head 

 and prothorax, somewhat feebly incrassate toward apex, third joint more than 

 twice as long as wide but distinctly shorter than the next two together, 

 eleventh fully as wide as the tenth, rather longer than wide, ovate, obliquely 

 pointed at apex. Prothorax fully twice as wide as the head and about twice 

 as wide as long ; apex very much narrower than the base, very deeply emar- 

 ginate, the angles right, not at all rounded and anteriorly prominent ; hase 

 transverse, the lateral sinuations wide and very deep ; basal angles nearly 

 similar to the apical, very slightly acute ; sides strongly and evenly arcuate 

 throughout ; disk widest a little before the base, very broadly and abruptly 

 explanate at the sides throughout the length, rather finely but very deeply 

 and densely punctate throughout, the coarse bristles and coarse recumbent 

 hairs almost evenly intermingled, the latter condensed in two small discal 

 spots. Scutellum triangular, distinct, densely pubescent, the smooth border 

 very narrow. Elytra behind the middle very slightly wider than the protho- 

 rax, nearly three times as long ; sides almost straight toward base, arcuate 

 behind; apex rather narrowly rounded; disk with rather fine, moderately 

 impressed strise which are closely and not very coarsely punctate ; intervals 

 wide, alternately more strongly although moderately convex beginning with 

 the third interval, very obscurely but rather densely punctate, each puncture 



