CoUopterological Notices, V. 341 



Brachida notha before me, the middle tarsi are clearly four-jointed, 

 but they are equally plainly five-jointed in Trichiusa, and the two 

 genera differ completely in the form and relations of the intermeso- 

 coxal sclerites. 



Although most closely allied to Hoplandria, the species of Tri- 

 chiusa bear a striking resemblance to Gyrophaena, having the same 

 stout compact form, but may be known by the long hirsute vesti- 

 ture and the distinctly five-jointed middle tarsi. Of the following 

 five species, the first is to be considered the type; they are however 

 all congeneric: — 



Aiiteinise strongly incrassate and stout from the fourth joint, which is strongly 

 transverse COIupacta 



Anteiinffi not so thick, more gradually and feebly incrassate, the fouilh joint 

 subglobular and only slightly transverse. 

 Body black throughout. 



Prothorax at base nearly as wide as the elytra, the humeri scarcely at 

 all exposed. 

 Deflexed apical angles of the prothorax obtuse but only very narrowly 

 rounded ; elytral vestiture shorter, coarser and subdeeumbent, a few 



long erect setae bristling along the sides of the body setigera 



Deflexed apical angles rounded ; vestiture throughout the body con- 

 sisting of long equal closely placed and erect hairs, without longer 



bristling setse along the sides pilosa 



Prothorax at base narrower than the elytra, the humeri distinctly ex- 

 posed ; vestiture rather long but decumbent ; lateral setae subobsolete. 



robustula 



Body pale rufo-testaceoua throughout, with a small pieeous spot toward the 



middle of the fourth tergite ; prothorax small ; humeri broadly exposed ; 



vestiture very long, sparse bat shaggy parTicollis 



The species appear to be rather numerous, and others are perhaps 

 known at present in cabinets. 



T. COmpacta n. sp. — Stout, subparallel, convex, shining, the elytra 

 polished, black, the antennae toward base, elytra, apical parts of the first 

 three tergites and legs paler, rufo-testaceous ; head and pronotum very 

 minutely sparsely punctate, the former with some larger punctures, the 

 latter with a few scattered large punctures toward base ; elytra rather 

 coarsely, sparsely and somewhat irregularly punctured ; abdomen sparsely, 

 minutely granulato-punctate, the impressed parts subimpunctate ; pubescence 

 rather long, sparse and coarse. Head three-fourths as wide as the protliorax, 

 wider than long, with a feeble central impression, the antennae longer than 

 the prothorax and elytra, strongly incrassate. Prothorax a little less than 

 twice as wide as long ; sides subparallel, arcuate ; base and apex broadly, 

 strongly arcuate ; apical angles moderately deflexed, broadly rounded ; basal 



