CYRIONYX.—NERTUS. 205 
The following species was overlooked till it was too late to include it in the 
Table :— 
18(a). Cyrionyx exaratus, sp. n. 
Rhomboidal, shining, black; the sides of the prothorax broadly, the under surface and legs sparsely, clothed 
with very fine, hair-like, white scales, the scutellum also albo-squamose, the elytra almost bare. 
Rostrum strongly arcuate, stout, a little longer than the prothorax, finely punctate, the apical half 
almost smooth, the antenne inserted at the middle. Prothorax transverse, with the sides arcuately 
converging from the base, strongly constricted in front; finely, somewhat closely punctate, the punctuation 
becoming denser and confluent towards the sides and on the flanks. Elytra triangular, convex, compressed 
at the sides; punctato-sulcate, the interstices almost smooth, narrow and very convex throughout. 
Beneath closely, the abdomen sparsely, punctate; fifth ventral segment deeply foveate. Anterior cox 
narrowly separated. Prosternum sulcate. Femora sharply unidentate. Tarsal claws connate, very 
small, 
Length 2,);, breadth 11 millim. (<¢.) 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 
One specimen. Near C. exiguus, the prothorax much more sparsely punctate and 
bare on the disc, the elytra more convex, with the interstices smoother and narrowly 
raised throughout. 
Sect. NERTIDES. 
Nertides and Madopterides, Lacordaire. 
This section includes a few Tropical-American genera, mainly recognizable by their 
elongate general shape, and long, cylindrical, almost straight rostrum, with gradually 
descending scrobes. ‘The tarsi are greatly dilated in the typical forms. Lasides is 
provisionally placed in it for the present. 
NERTUS. 
Nertus, Schénherr, Gen. Cure. viii. 1, p. 76 (1844); Lacordaire, Gen. Col. vii. p. 240. 
The few known members of this Tropical-American genus are of elongate, subelliptic 
or fusiform shape, and have the general facies of some of the narrower species of 
Cholus, from which they may be readily separated by the ascending mesothoracic 
epimera, &c. The two Central-American forms have the second and third joints of 
the anterior and intermediate tarsi very broadly, and those of the posterior tarsi less 
strongly, dilated. 
1. Nertus suturalis. (Tab. XII. figg. 3, 3a, 2.) 
Nertus suturalis, Boh. in Schénh. Gen. Cure. viii. 1, p. 78°. 
Hab. Mexico, Jalapa (Hoge).—Brazit, Minas Geraes '. 
We have two females of this species from Jalapa, easily recognizable by the toothed, 
unguiculate anterior tibie, and the dense line of coarse yellowish-white scales along 
