GERZUS., 277 
32. Gerzeus convexiusculus, sp. n. 
Subrhomboidal, rather convex, shining, black, the extreme tip of the rostrum ferruginous ; above thickly and 
uniformly clothed with narrow whitish scales, those on the elytra arranged in two or three rows down 
each interstice (the first interstice with one row only from a little below the base); the under surface 
densely set with larger white scales. Head closely punctate; rostrum much longer than the head and 
prothorax, strongly arcuate, stout, squamose and closely punctate to the tip in the ¢, the apical half 
somewhat flattened, bare, and much smoother in the 9, the antenne inserted at about the middle, the 
antennal club ovate. Prothorax much broader than long, rapidly and arcuately narrowing from the base, 
constricted in front; densely, finely, confluently punctate. Scutellum punctate and squamose. Elytra 
rather short, subtriangular ; finely punctate-striate, the interstices rugulose. Beneath densely punctate. 
Prosternum armed with two short spines in the ¢. Tibi strongly unguiculate, especially in the 6, 
the anterior pair slightly hollowed on the inner side towards the apex in this sex. 
Length 24-8, breadth 12-13 millim. (¢ 9.) 
Hab. Guaremaua, Capetillo (Champion). 
Three males and two females. A comparatively short, convex form, with uniform 
whitish vestiture, the male with a long, stout, squamose rostrum and two short pro- 
sternal spines, the tibie strongly unguiculate in this sex. Broader and more convex 
than G@. gracilis, the scutellum squamose, the prosternal spines stouter, the anterior 
tibize of the male less sinuate within *. 
33. Gereeus bituberculatus, sp. n. 
Oblong-rhomboidal, narrow, flattened above, dull, black or piceous ; above clothed with small, narrow, black or 
brown scales, with a few scattered white scales intermixed, the vestiture of the under surface closer, 
coarser, and wholly white, that of the legs also whitish. Head closely punctate; rostrum strongly 
arcuate, rather longer than the head and prothorax, stout, tapering towards the tip, coarsely punctate at» 
the base, sparsely so towards the apex, the antenne inserted at the middle, the antennal club ovate. 
Prothorax transverse, conical, densely, finely punctate. Scutellum oblong, narrow. Elytra rather 
long, subtriangular; finely punctate-striate, the interstices densely punctate. Beneath densely punctate ; 
first ventral segment flattened down the middle. Prosternum armed with two small, compressed, conical 
tubercles. Legs rather long; anterior tibie narrow, sinuous and finely ciliate within, armed at the apex 
with a long claw. 
Length 343-33, breadth 13-13 millim. (<¢.) 
Hab. Mexico (Truqui, in Mus. Brit.), Chilpancingo (H. H. Smith). 
Two males, one somewhat immature and found many years ago by Truqui, the two 
agreeing perfectly inter se. The fine dark vestiture of the upper surface, with a few 
white scales intermixed, the bituberculate prosternum, and the unusually long claw of 
the anterior tibia, distinguish G. ituberculatus, at least in the male sex. 
34, Gerzeus perscillus. 
Centrinus perscillus, Gyll. in Schénh. Gen. Cure. iii. p. 762’; Casey, Ann. N. York Acad. Sci. v. 
pp. 575, 5847. 
° Centrinus perscillus, Lec. Proc. Am. Phil. Soc. xv. p. 310°. 
Hab. Norta America!, Kansas 3 and Minnesota2.—Mexico, Presidio (forrer), 
Cordova, Jalapa (Hége) ; Bririsn Honpvras, R. Sarstoon (Blancaneaux). 
* Centrinus biseriatus, Kirsch, from Peru, is an allied form with finer vestiture, less prominent humeri, &e. 
