GERAUS. 289 
long, triangular, flattened and transversely depressed on the anterior part of the disc, the subapical 
callosities prominent; finely punctate-striate, the interstices densely punctulate. Beneath densely 
punctate ; first ventral segment broadly depressed down the middle in the g. Prosternum in both sexes 
shallowly sulcate, the sulcus limited on each side anteriorly by a compressed tubercle. Anterior coxte 
narrowly separated. Legs rather slender; anterior tibie in the ¢ strongly, and in the 2 feebly, 
unguiculate. 
Length 33-32, breadth 13-1? millim. (¢ 2.) 
Had. Guatemaua, Calderas 7000 feet, on the slope of the Volcan de Fuego 
(Champion). 
Three males and one female, two of them in bad condition. Not unlike the Mexican 
G. bifurcatus, but with the vestiture of the elytra differently coloured, the scales on 
the short white sutural stripe imbricate, the densely squamose prosternum shallowly 
sulcate and bituberculate just behind the apical constriction. The tubercles are 
placed further from the anterior coxe than in the males of the other Centrinides with 
tuberculate or spined prosternum, and are present in both sexes. 
58. Gereus puncticollis. (Tab. XV. figg. 30, 30a, ¢.) 
3. Centrinus puncticollis, Boh. in Schénh. Gen. Cure. viii. 1, p. 200°. 
¢. Broad-ovate, robust, black, almost glabrous above and sparsely albo-squamose beneath. Head closely 
punctate; rostrum stout, arcuate, of equal thickness throughout, about as long as the head and prothorax, 
coarsely, closely punctate, and clothed with several bristly hairs at the tip beneath, the antenne inserted 
behind the middle; mandibles toothed at the base beneath, straight on their inner edge. Prothorax 
transversely convex, strongly rounded at the sides, narrow and abruptly tubulate in front, deeply sinuate 
at the base; coarsely, closely punctate, except along the smooth median line. Scutellum smooth, 
concave. Elytra broad, subtriangular, comparatively short, transversely depressed below the base and 
beyond the middle, and flattened along the suture; sharply striate, the interstices somewhat closely 
punctate. Prosternum narrowly and shallowly sulcate anteriorly, slightly tumid in front of each 
anterior coxa, the intervening space flattened. Anterior coxe separated by a little more than their 
own width. Legs short and stout, rugosely punctured. Tibiew widened at the apex externally, the 
anterior pair closely ciliate within. Tarsi with joint 2 transverse, the claws free. 
Length 51, breadth 3 millim. 
Hab. Mexico, Alvarado in Vera Cruz (coll. Chevrolat *). 
The unique type of this aberrant species has been communicated by Dr. Sjostedt. 
The feeble prosternal prominences are due to the intervening space being broadly 
flattened. | 
59. Gereeus scutatus, sp. n. (Tab. XV. figg. 31, 31a, ¢.) 
Oblong-subrhomboidal, rather narrow, shining, black; the upper surface with scattered, narrow, white scales 
along each elytral interstice and at the sides of the prothorax, the scutellum with a dense transverse 
‘patch of similar scales; the under surface and legs somewhat thickly albo-squamose. Head closely 
punctate; rostrum strongly arcuate, about as long as the head and prothorax, rather stout, thickened 
towards the base, coarsely striate-punctate in the ¢, flattened towards the tip and minutely punctate 
from near the base in the 2, the antenne inserted slightly behind (@) or a little beyond ( ¢ ) the 
middle, joints 4-7 of the funiculus strongly transverse in the d, the club elongated and nearly as long 
as the funiculus in the ¢, ovate in the 9. Prothorax broader than long, constricted and much 
narrowed in front, the sides rounded anteriorly; closely, coarsely punctate, except along a narrow, 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 5, May 1908. 2 Ppp 
