562 Coleoplerological Notices, IV. 



affinity with Rlioptobaris. The squamose vestiture so higlily de- 

 veloped in the Centrini is also one of the most characteristic features 

 of Trichobaris, g-iving it a peculiar and easily recognized aspect 

 among the semi-glabrous genera with which it must be associated, 

 for it is easily distinguishable from Pycnobaris by its oblong form. 

 The elongate parallel outline of the body is however not peculiar to 

 this genus, being exhibited equally well in Stictobaris. 



In Trichobaris the prosternum is broadly and feebly impressed 

 along the middle and narrowly separates the coxa3, the formation 

 of these parts being nearly as in Biris. The scutellum is large, 

 strongly transverse, broadly, deeply impressed and with the sides 

 acutely angulate, occasionally being prominent and more or less 

 reflexed toward apex or corniform, a development especially char- 

 acteristic of the present genus, although suggested rather strongly 

 in the first section of Baris. 



The vestiture consists of broad scales, sometimes both above and 

 beneath, but often replaced by long slender squamules on the upper 

 surface; they are always recumbent and often subdenuded in vari- 

 ous limited areas, especially in two small spots at the base of the 

 pronotum, in two large subconfluent areas at the sides of the pro- 

 thorax beneath, and, in mucorea, also in three small spots at the 

 base of the beak ; these spots are not really denuded, but are clothed 

 with smaller and more slender piceous-black squamules. On the 

 abdomen there is always a large subquadrate area more or less 

 completely glabrous, occupying the median portions of the two or 

 three last segments; this is independent of the sex of the individual. 



The antennal club varies in structure nearly as in Plesiobaris, 

 enabling us to group the species as follows: — 



Antennal club moderately large, much longer than wide, with the basal joint 

 constituting less than one-half of the mass ; vestiture variable but with 

 the squamules always oblique at the sides of the elytral intervals ; body 

 generally subdepressed above, the prothorax always more or less quasi- 

 denuded beneath at the sides. 

 Vestitnre of the upper surface consisting of slender squamules, which do 

 not completely conceal the sculpture. 

 Pronotum simply punctate, without impunctate and subcarinate median 



line; antennal club robust and abrupt 1 triiiotata. 



Pronotum densely and continently punctate, sometimes longitudinally 

 rugose, the sides more or less feelily sinuate just behind apical third ; 

 antennal club more slender and elongate, less abrupt, the outer funicu- 

 lar joints more transverse ; pronotum with a narrow impunctate median 

 carina; size larger, the vestiture denser 2 mucorea 



