188 RHYNCHOPHORA. 
LYDAMIS. 
Lydamis, Pascoe, Ann. & Mag. Nat. Hist. (6) iv. pp. 322, 328 (1889). 
Mandibles toothed on their inner edge; eyes moderately large, depressed; rostrum strongly arcuate, longer 
than the head and prothorax, the scrobes descending, the antenne inserted at about the middle in both 
sexes, joints 1 and 2 of the funiculus nearly equal in length, the club acuminate-ovate ; prothorax some- 
what conical, without ocular lobes, deeply bisinuate at the base, the median lobe broad and subtruncate ; 
scutellum short and broad; elytra broad and triangular; pygidium not visible; prosternum unarmed 
in the ¢, depressed between the coxee, the median sulcus broad ; anterior coxx subcontiguous, the others 
more or less widely separated ; femora strongly clavate and sharply dentate ; tibia strongly unguiculate ; 
anterior tarsi similar in the two sexes; tarsal claws long, free; body rhomboidal, thickly clothed with 
hair-like or narrow scales. 
Type, Centrinus angulus, Boh. 
Centrinus angulus, Boh., from Brazil (Para, Santarem, &c.), and its closely-allied 
Mexican representative, C. cinnamomeus, are nearly related to Optatus, differing from 
that genus in the strongly clavate femora, the simple anterior tarsi of the male, and the 
long, divergent claws. 
1. Lydamis cinnamomeus, sp. n. (Tab. XI. figg. 9, 9a, 3.) 
Convex, somewhat shining, black, the antennx and the apices of the tarsi obscure ferruginous ; the vestiture 
close, fine, and hair-like, fulvous or rust-red, that of the elytra in great part fuscous or black, a few 
small white scattered spots excepted (these sometimes condensed into a narrow oblique streak on the 
dise towards the apex), the prothorax with a faint white streak along the flanks and the under surface 
with a few intermixed whitish scales. Rostrum rather stout, rugosely punctate and carinate, the apical 
half closely (¢) or sparsely (Q) punctate. Prothorax broader than long, rapidly narrowing from the 
base, slightly compressed at the sides before the apex; densely, finely punctate and feebly carinate. 
Elytra punctate-striate, the interstices densely punctulate, flat on the disc, feebly convex at the sides, 
7 and 8 with a faint raised line. Beneath closely punctate; metasternum and first two ventral segments 
broadly excavate down the middle in the ¢. 
Length 51-62, breadth 3,,-4 millim. (d 9.) 
Hab. Mexico, Playa Vicente and Toxpam in Vera Cruz (Sa/lé). 
Four specimens, one of which is immature. Very near L. angulus, Boh., but with 
the vestiture finer and more scattered (above and beneath); the surface less densely 
punctulate and more shining; the prothorax not so convex on the middle of the disc; 
the elytra less flattened on the disc posteriorly. 
CYRIONYX. 
Cyriony#, Faust, Stett. ent. Zeit. 1896, p. 97. 
Numerous species are placed under this genus, which was referred by Faust to the 
“ Pantotelides.” Centrinus scapulosus, Boh., and the larger forms approach Optatus 
and Telemus, and one, C. camelus, is very like Scambus galeatus, Boh.*; the smaller 
forms are closely related to the Venezuelan C. biplayiatus, Faust (the type of which, 
a ¢, 1 have examined). As there is a gradual transition in these insects from one to 
* Lacordaire (Gen. Col. vii. p. 232, nota) has already called attention to the characters of this species. 
