RHYNCHOPHORA. 489 
Prothorax strongly transverse, rounded at the sides anteriorly and constricted in front; densely, finely 
punctate. Scutellum small, almost bare. Elytra considerably wider than the prothorax, subtriangular ; 
narrowly punctate-striate, the interstices rugose. Beneath closely punctate ; first ventral segment 
slightly depressed down the middle in the ¢. Anterior cox separated by about their own width. 
Tibize feebly unguiculate, the anterior pair almost straight. 
¢@. Prosternum with a very small tubercle in front of each coxa. 
Length 3-32, breadth 12-13 millim. (d 9.) 
Hab. Mexico, Cuernavaca (Wickham: 3 ¢), Chilpancingo (H. H. Smith: ¢). 
Five males and three females. ‘This insect differs from G. squamirostris in having 
the prothorax relatively shorter and considerably narrower than the elytra, the rostrum 
of the male evenly arcuate and almost bare beneath, that of the female less widened 
outwards and not so abruptly flattened, the prosternum of the male with a minute 
tubercle in front of each coxa. ‘The shorter and stouter rostrum, the less elongate 
vestiture, the bituberculate prosternum of the male, &c., separate G. subinernits from 
all the forms of G. penicellus, a common species at Cuernavaca. Compared with 
G. gracilis, the female has a broader, flatter, and smoother rostrum, and the male less 
sinuate anterior tibie and an almost unarmed prosternum. 
Gerzeus x-notatum (p. 282). 
To the Mexican localities given, add :—Cuernavaca (Wickham: ¢ ). 
Described from two females. ‘The male has two moderately long porrect prosternal 
spines and the anterior tibia hollowed on the inner side towards the apex. 
50 (a). Gereus costatus, sp.n. (Tab. XXIII. figg. 18,184, 2.) 
Gereus sp., antea, p. 269, nota. 
Rhomboid-ovate, robust, subopaque above, shining beneath, black; sparsely clothed with small, hair-like, 
inconspicuous scales, the elytral interstices 2-6 each with a dense patch of coarser, narrow, ochreous 
scales at the base, together forming a sinuous basal fascia. Head closely punctate, foveate vetween the 
large eyes ; mandibles angulate at the base beneath; rostrum arcuate, about as long as the head and 
prothorax, stout, thickened towards the base, closely punctate, the apical half almost smooth, the 
antenn inserted at the middle. Prothorax transverse, deeply bisinuate at the base, narrow and 
tubulate in front, the sides strongly rounded anteriorly ; densely, rather coarsely punctate. lytra 
subtriangular, much wider than the prothorax, conjointly rounded at the apex; punctato-sulcate, the 
interstices costate and densely, coarsely punctate. Beneath coarsely, closely punctate. Anterior cox 
narrowly separated. Legs short ; all the tibi dilated at the apex externally; third tarsal joint 
broadly bilobed. 
Length 64, breadth 3} millim. (@Q.) 
Hab. Mexico, Mexico city (Herrera, in U.S. Nat. Mus.). 
One female, with the legs somewhat injured. ‘This conspicuous species is not 
unlike G. scabrosus and G. inornatus, but on account of the shorter and stouter 
rostrum it seems to be more nearly related to G. tencbricosus, G. pugnax, and G. basi- 
notatus. The rugose, costate, basally ochreo-fasciate elytra readily distinguish 
4. costatus from all the other species of the genus described in this work. The 
prosternum is doubtless spined in the male. a _ 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 5, Aprad 1909. 3RR 
