TYLODINUS. 469 
2. Tylodinus planicollis, sp. n. (Tab. XXII. fige. 27, 27a, 2.) 
Oblong-ovate, robust, dull, black ; the head and prothorax densely, and the elytra a little more sparsely, clothed 
with ferruginous or fulvous scales, the prothorax with a few semierect scales on the disc, and the elytra 
with scattered semierect sete, the head usually with a transverse ochreous whitish patch in front, the legs 
fulvo- or fusco-squamose and albo-setose. Head rugulosely punctate ; rostrum (¢ ) rugulosely punctate 
and unicarinate, smoother and bare at the tip, (2) bare and finely punctate from near the base; antennse 
with joint 2 of the funiculus much longer than 1, 3-7 short, the club elongate. Prothorax about as long 
as broad, rapidly narrowing from the middle forwards, hollowed at the base, broadly flattened and slightly 
hollowed on the dise anteriorly, and with a rounded or oblong prominence about the middle; closely, 
minutely punctate. Elytra slightly wider than the prothorax, produced at the apex, subpentagonal, 
bisinuate at the base ; coarsely seriate-punctate and sparsely granulate, the punctures towards the sides 
becoming very large, foveiform, and more or less confluent ; each elytron with seven large oblong or 
rounded tubercles on the disc, the outer posterior one sometimes lamelliform and the one on the seventh 
interstice projecting laterally. Femora unidentate. 
Var, Smaller ; the head with a transverse white patch ; the prothorax flatter and smoother, and wanting the 
median prominence ; the elytra with the seriate punctures shallower and smaller, the interstices more 
coarsely granulate, the tubercles not so large. 
Length 83-114, breadth 43-7 millim. (¢ 2.) 
Hab. Mexico (Mus. Dresden), Toxpam (Sallé); Guaremata, Purula (Champion) ; 
Nicaracua, Chontales (Belt); Panama, Volcan de Chiriqui (Champion). 
Hight specimens, including the small varietal form from Purula. The largest of the 
Central-American species. It has a long, flattened, uni-tuberculate prothorax, sub- 
pentagonal, coarsely multituberculate elytra, and dentate femora. The sculpture is 
variable, and the frontal patch is sometimes obsolete. 
8. Tylodinus quadrilamellatus, sp. n. (Tab. XXII. figg. 28, 28a, ¢ .) 
Oblong-ovate, dull, black, the antennz and the tips of the tarsi ferruginous ; sparsely clothed with dark brown 
scales, the head with two ochreous spots in front, the elytra with intermixed blunt fuscous sete on the 
apical declivity, the legs with fuscous and white sete. Head rugulosely punctate; rostrum slightly 
widened towards the base, rugosely punctate in its basal half and almost smooth thence to the tip ; 
antenn with joint 2 of the funiculus much longer than 1, 3-7 short, together of the same length as the 
elongate club. Prothorax somewhat flattened above, broader than long, abruptly narrowed in front and 
also a little narrowed behind, the base hollowed; sparsely granulate, except upon the transverse, almost, 
smooth, bare, depressed space in front. Elytra subtriangular, much wider than the prothorax at the base 
and strongly produced at the apex, the base deeply bisinuate, the broad obtuse humeri projecting forwards : 
interruptedly seriate-punctate, the interstices sparsely granulate, 1 with a regular row of granules to 
beyond the middle, 3 with two very large, narrowly separated, compressed, lamelliform prominences at 
about the middle (the anterior one oblique, the other longitudinal), 2 and 4-7 with scattered smaller 
rounded or oblong prominences extending down the anterior half. Femora feebly unidentate. 
Length 8, breadth 44 millim. (¢.) 
Hab. GuateMALA, Coban in Vera Paz (Conradt). 
One specimen. Recognizable from its allies by the broad anteriorly projecting 
humeri of the elytra, and the four very large compressed prominences on the disc 
of the latter. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 4, January 1905. 300 
