GERAUS. 271 
19. Gerzus trivittatus, sp.n. (Tab. XV. figg. 2, 2a, 3.) 
Subrhomboidal, black; the prothorax and elytra with three rather broad continuous vitte (the outer ones 
submarginal on the elytra, the median one confined to the sutural interstice and not extending to the 
scutellum), which are sometimes connected across the anterior portion of the pronotum, the anterior half 
of the prothorax beneath, and the metathoracic episterna, densely clothed with narrow ochreous scales, 
the rest of the vestiture of the upper surface close and black, and that of the under surface and legs white, 
the rostrum with a few hair-like ochreous scales. Head closely punctate, transversely grooved between 
the eyes; rostrum strongly arcuate, longer than the head and prothorax, stout in its basal half and 
becoming more slender thence to the tip, striate-punctate, the apical half much smoother in the 9, the 
antenne inserted at (2) or beyond ( ¢) the middle, joints 1 and 2 of the funiculus elongate, 2 nearly as 
long as 1, the club ovate. Prothorax transverse, subconical, feebly constricted in front ; densely, finely, 
confluently punctate. Elytra subtriangular, narrowly punctate-striate, the interstices broad and densely, 
rugulosely punctate. Beneath densely punctate. Prosternum slightly depressed down the middle in front 
of the coxe, the-latter narrowly separated. Tibize strongly unguiculate. 
¢$. Prosternum armed with two downwardly-directed spines ; first ventral segment flattened down the middle ; 
anterior tibiz slightly hollowed on the inner side at the apex. 
9. Prosternum with a small conical tubercle in front of each anterior coxa which is sometimes obsolete. 
Length 34-43, breadth 14-22 millim. (¢ 2.) 
Hab. Mexico (Mus. Brit.; coll. Solari), Orizaba (Sallé); Guatemana (Sallé), near 
the city (Salvin), Capetillo, Duefias, San Gerénimo (Champion), Chimaltenango (Con- 
radt), Senahu (Haase, in U.S. Nat. Mus.) ; Panama, Volcan de Chiriqui (Champion). 
Numerous examples. A well-marked species, easily distinguishable by the three 
sharply-defined, continuous, ochreous vitte on the prothorax and elytra, and the 
elongate first and second joints of the funiculus. Larger than G. lineedlus, the rostrum 
very much stouter towards the base, the prothorax more transverse, the prosternal 
spines short, &c. 
20. Gereeus tetrastigma, sp.n. (Tab. XV. figg. 3, 3a, 3.) 
Rhomboidal, nigro-piceous, the antenne and tarsi fusco-ferruginous ; somewhat thickly clothed with small, 
narrow, intermixed brown and whitish scales, the latter clustered into three faint vittze on the prothorax, 
a short streak on the second elytral interstice at the apex and another on the fourth near its point of 
termination, the scales on the elytra arranged in two or three rows down each interstice ; the vestiture 
of the under surface whitish and ochreous intermixed. Head closely punctate; rostrum strongly arcuate, 
longer than the head and prothorax, rather slender, striate-punctate and also carinate, smoother at the 
tip, the antennz inserted at a little beyond the middle, the antennal club ovate. Prothorax transverse, 
conical, constricted in front; densely, finely, confluently punctate, the narrow interspaces sinuous and 
rugiform. Elytra triangular, narrowly striate, the interstices flat, broad, and closely punctate, 2 a little 
wider than the others. Beneath densely punctate; first ventral segment excavate and smoother down 
the middle. Prosternum armed with two long, porrect spines, and also shallowly sulcate. Anterior tibix 
strongly unguiculate, slightly hollowed towards the apex within. 
Length 44-42, breadth 1%, millim. (<¢.) 
Hab. Mexico (Hoge, in coll. Solari). 
Two males, for one of which we are indebted to Signor Solari. The two whitish 
streaks on each elytron near the apex are conspicuous, and the second dorsal 
interstice is a little wider than the others. The mandibles are straight on their inner 
