ONYCHOBARIS.—TREPOBARIS. 423 
broader than long, rounded at the sides anteriorly, strongly constricted in front, deeply bisinuate at the 
base ; closely, finely punctate, except along the smooth median line. Scutellum strongly transverse, 
hollowed in the middle. Elytra a little wider than the prothorax, very gradually narrowed from the 
somewhat swollen humeri, undulate on the disc; with narrow, feebly punctured striz, the interstices 
broad, flat, very finely, irregularly punctate, becoming transversely strigose towards the sides. Beneath 
densely, the abdomen more sparsely and finely, punctate ; first ventral segment hollowed down the 
middle in the ¢. Prosternum flattened, transversely hollowed at the apex. Anterior coxe separated 
by about twice their own width. Legs densely, rugosely punctate; anterior femora sharply dentate, 
the others unarmed. 
Length 22-44, breadth 13-2,1, millim. (d 9.) 
Hab. Mexico (Truqui, in Mus. Brit.; coll. Solari), Guanajuato, Puebla (Sai/é), 
Jalapa (Hége), Toluca (Wickham), Tlalpam (R. H. Hay, in U.S. Nat. Mus.). 
This insect has long been known from Mexico, and does duty for Pseudobaris 
senescens in the Sallé collection and for P. subscabrosa in the British Museum. It is 
very different from any of the described species of Onychobaris known to me, but 
possesses all the structural characters of the three other Central-American members 
of the genus. The finely striate, comparatively smooth, undulate elytra, the abundant 
vestiture, &c., readily distinguish O. senecta. The colour is as variable as in Pseudo- 
baris acutipennis. 
TREPOBARIS. 
Trepobaris, Casey, Ann. N. York Acad. Sci. vil. pp. 466, 519 (1892). 
The single N.-American species referred to this genus extends into Mexico, whence 
three other forms are now added. They differ from Pseudobaris in their oblong or 
subcylindrical form, and in having the prothorax feebly constricted in front and feebly 
sinuate at the base (the median lobe being short and obtuse), and the elytra not or 
very little wider than the prothorax. The subcylindrical form of body is still more 
pronounced in 7. perlonga than in the type, T. elongata, Casey. The rostrum is stout, 
arcuate, abruptly separated from the head, and bowed from the base. ‘The elytra, as 
in Pseudobaris, sometimes have a small white spot at the base of the third interstice. 
1. Trepobaris perlonga, sp.n. (Tab. XX. figg. 33, 334, 3.) 
Elongate, subcylindrical, shining, black; glabrous above, the punctures on the under surface and legs each 
pearing a minute white hair-like scale. Head finely punctate, transversely grooved between the eyes ; 
rostrum abruptly bowed from the base, stout, a little longer than the prothorax, closely punctate, 
smoother in the 9, the antenne inserted at (¢) or just behind (2) the middle, joint 1 of the 
funiculus elongate, as long as 2-5 united. Prothorax subcylindrical, a little broader than long, 
arcuately narrowed and feebly constricted in front, and feebly bisinuate at the base; coarsely, closely 
punctate, and often with an incomplete smooth median line. LElytra elongate, not or very little wider 
than the prothorax, with narrow feebly punctured strie, the interstices flat, rather coarsely and closely 
uniseriate-punctate, 3 not dilated at the base, 9 raised posteriorly. Pygidium densely punctate, convex 
in the g, smaller and flattened in the 9. Beneath densely, the abdomen more finely and sparsely, 
punctate, the metasternum and first ventral segment excavate down the middle in the ¢. Prosternai 
sulcus sharply defined, rather narrow. Femora obsoletely serrulate, without definite tooth. Anterior 
tibiee with the apical uncus elongated in the ¢. 
Length 375-43, breadth 1-14 millim. (dd Q.) 
