286 RHYNCHOPHORA. 
the anterior tibie broad and sinuous within; on the under surface a few narrow scales 
are to be seen. G. tenebricosus also resembles Prionobaris asper, but it is much larger, 
the tibiz are not serrate, &c. 
51. Gereus pugnax. (Tab. XV. figg. 23, 23a, ¢.) 
2. Centrinus pugnax, Boh. in Schonh. Gen. Cure. vii. 1, p. 214°. 
3g. Prosternum armed with two short upwardly-curved spines, and with a deep heart-shaped excavation 
extending forward to the subapical constriction ; first ventral segment flattened down the middle. 
©. Prosternum with a smooth, deep, transverse fovea in the subapical groove. 
- Hab. Mexico (Truqui, in Mus. Brit.), 1Tultepec [Toulepec*] (coll. Chevrolat), 
Orizaba (Ff. D. Godman), Toxpam, Capulalpam (Sal/é), Cordova, Jalapa (Hége), Venta 
de Zopilote (H. H. Smith), Cuernavaca (U.S. Nat. Mus.), Temax in N. Yucatan 
(Gaumer); GuatemaLa, Cerro Zunil, Calderas, Capetillo, San Gerédnimo, Sabo 
(Champion) ; Sauvapor (U.S. Nat. Mus.). 
We have received numerous specimens of this species, agreeing with the type 
communicated by Dr. Sjdstedt. A rhomboid-ovate, rugosely punctate form, with 
rather close, decumbent, hair-like, brownish vestiture, the elytra sometimes with a few 
whitish, setiform scales on the disc towards the apex, the punctures on the prothorax 
coarse, rounded, and separate one from another, the elytral strize and interstices 
coarsely punctate, the tibiz strongly unguiculate in both sexes. 
52. Gereeus basinotatus, sp.n. (Tab. XV. figg. 24, 24a, ¢.) 
Subrhomboidal, shining, black ; the prothorax with a few transversely-arranged, long, narrow, white scales ; 
the elytra with a dense, oblong, subtriangular patch of coarse white or ochreous scales on each side of the 
scutellum at the base, and a line of narrow fuscous scales, intermixed with larger white ones, down each 
interstice ; the under surface thickly clothed with coarse white or pale ochreous scales, the vestiture of 
the legs finer and wholly white. Head finely punctate, transversely grooved between the eyes; rostrum 
stout, strongly arcuate, a little shorter than the elytra, broadly sulcate at the sides in its basal half, and 
somewhat coarsely punctate, in the 9 much smoother, more tapering, and abruptly bent inward from 
near the base, the antenne inserted at about the middle, the antennal club ovate. Prothorax transverse, 
constricted and much narrowed in front, the sides arcuately converging from the base } very coarsely, 
densely punctate, except along the smooth median line. Elytra subtriangular, depressed along the 
suture; deeply punctate-striate, the interstices roughly asperato-punctate. Beneath densely punctate, 
except along the middle of the ventral segments 3 and 4. 
3. Prosternum armed with two short spines, and with a deep median sulcus; first ventral segment broadly 
depressed down the middle. 
Length 33-4, breadth 13-2 millim. (¢ 9.) 
Hab. Mexico, Chilpancingo (Hoge, H. H. Smith), Amula (H. H. Smith). 
Two males and one female, all from the mountains of Guerrero, This is the only 
Mexican species known to me with a dense subtriangular patch of coarse white or 
ochreous scales on the inner part of each elytron at the base. Compared with the 
allied G. pugnax, the prothorax is more coarsely punctured and the elytral interstices 
are rougher. The rostrum is broadly and shallowly sulcate at the sides towards the 
base (appearing compressed), and abruptly bowed inwards and tapering in the female, 
