RHYNCHOPHORA. 
6°. Prosternum () with two flattened bifurcate processes in front of the 
anterior cox = 2. 0. > oe © te eee he ew we) Species 54 
c’, Prosternum (g) with two completely connate spines . . . +. + + Species 55, 56, 
dad’, Prosternum (¢ ?) bituberculate anteriorly . . . . + + + © © Species 57. 
e*. Prosternum (¢) slightly tumid in front of each coxa; prothorax 
abruptly tubulate in front; elytra uneven; rostrum not widened 
towards the base ; upper surface almost bare. . . . + + «© » «+ Species 58. 
f°. Prosternum (¢ 2) unarmed. 
d’, Antennal club elongate in g,ovatein ?. . . . . . + «+ « + Species 59-62. 
e’. Antennal club acuminate-ovate in ¢, smaller and ovate in 2; 
anterior tarsidilated in @ . . .. . . . «© « « «© « « © Species 63, 64. 
f°’. Antennal club ablong-ovate or ovate in both sexes; anterior tarsi 
not dilated in ¢. 
c’. Upper surface more or less metallic; species small . . . . ~. Species 65-68, 
d*. Upper surface not metallic. 
ce’. Elytra and prothorax with scattered or close vestiture. 
a’. Mandibles moderately long or short. 
a’. Subapical callosities of the elytra prominent . . . . . Species 69. 
6". Subapical callosities of the elytra not prominent . . . . Species 70-100. 
6°. Mandibles more elongate ; eyes narrowly separated. . . . Species 101. 
ad’. Eiytra glabrous ; the prothorax squamose. . . . . . . . Species 102, 
1. Gereeus arcuatirostris, sp.n. (Tab. XIV. fige. 19, 19a, 2.) 
Broad ovate, rather convex, feebly shining, piceous, the antenne and the tips of the tarsi ferruginous ; 
clothed with rather long, coarse, adpressed, setiform, ochreous scales, the vestiture of the prothorax 
transversely arranged and that of the elytra placed in close lines, the elytra also with a few intermixed 
whitish sete ; the under surface and legs with hair-like, yellowish-white scales. Head closely punctate ; 
rostrum slender, cylindrical, reaching to the apex of the metasternum, abruptly and strongly arcuate 
from the base, somewhat coarsely striate-punctate, smooth along the middle, the antenne inserted at the 
basal fourth, the antennal club large, acuminate-ovate. Prothorax transverse, rounded at the sides, 
constricted and much narrowed in front; densely, rugosely, confluently punctate, and also carinate. 
Scutellum small, transverse. Elytra broader than the prothorax subcordate; deeply punctate-striate, 
the interstices asperato-punctate and (1 and 2 excepted) narrowly costate. Beneath densely punctate. 
Prosternum narrowly sulcate. Anterior cox separated by much less than their own width. Femora 
sulcate beneath. 
Length 34-4, breadth 23-21 millim. (@.) 
Hab. Mexico (Mus. Brit.), Cordova (Sallé). 
Two females. In this insect the rostrum is strongly and abruptly curved from the 
base, the prothorax is longitudinally rugose and carinate, and the elytral interstices 
are densely asperato-punctate and feebly costate. The prosternum is probably spined 
in the male. 
2. Gereeus pilosus, sp. n. (Tab. XIV. figg. 20, 20a, 2.) 
Oblong-subrhomboidal, shining, black, the rostrum (except at the base) and antenne obscure ferruginous ; the 
prothorax and elytra somewhat thickly clothed with very fine, short, dark, erect hairs, the elytra with a 
