208 RHYNCHOPHORA. 
which is known), but with the rostrum smooth and shining, the elytra a little broader, 
narrowing almost from the base, and the sete: longer and more conspicuous; the 
brownish spots on the suture (connecting the two fasciee of each elytron) are formed 
by patches of darker pubescence, the anterior one extending more forwards than in 
T. zonatus. There is a greater sexual difference, too, in the sculpture of the rostrum 
than is observable in the male and female of 7. obscwrus and J’. versicolor. 
10. Thysanocnemis brevis, sp. n. 
Subovate, ferruginous, the meso- and metasternum blackish ; rather sparsely clothed with yellowish-grey 
pubescence, that on the sides and middle of the prothorax, the scutellum, the suture in part towards the 
apex, and the under surface whitish, the elytra with two angulated fascie of slightly darker hairs, each 
interstice with an interrupted row of short, semierect, pallid sete. Rostrum stout, curved, short, about 
as long as the prothorax, rugulose at the sides, feebly carinate down the middle, the carina widening out 
into a smooth space anteriorly, and also with a fine raised submarginal line, the antenne inserted near 
the tip ; eyes very narrowly separated. Prothorax transverse, rounded at the sides, narrowed in front, 
closely, somewhat coarsely punctate, with a minute interstitial punctuation and indications of an 
abbreviated, raised, median line. Elytra comparatively short, punctate-striate, the punctures coarse, 
deep, and oblong in shape, the interstices rather convex and densely rugulose. Femora unarmed. 
Length 1%, breadth 1 millim. (¢.) 
Hab. Guatemata, Cubilguitz in Vera Paz (Champion). 
One specimen. Extremely like T. zonatus, but smaller, the rostrum less elongate, 
the elytra shorter, with the angulated fascize very faint and formed entirely by a slight 
darkening of the pubescence, the latter being sparser. Broader than 7. pusillus, the 
seriate punctures on the elytra coarse and oblong. 
SIBINIA. 
Sibinia, Germar, Ins. Spec. Nove, p. 289 (1824). 
Sibynes, Schonherr, Gen. Cure. iii. p. 480 (1836) ; Leconte, Proc. Am. Phil. Soc. xv. p. 218. 
A genus including numerous Palearctic forms, four only (two from Venezuela, one 
from Texas, and one from Lower California) having hitherto been described from 
America; the North-American species belonging, however, to Casey’s sections ITI. 
and IV. of Zychius would perhaps be better placed in Sibinia, these insects having 
the funiculus 6-jointed, as in the species now added from within our limits. The 
European Sibinie are said by M. Bedel to attack Caryophyllacee, while the Zychi 
are proper to the Papilionacee. 
The nine species here described may be grouped thus :— 
Form oblong-ovate ; vestiture of the upper surface rusty-red, sparsely intermixed 
with white; elytral striae broad anddeep . . - + + © © © © e es Species 1. 
Form broad-ovate, robust, convex ; vestiture of the upper surface in great part 
ochreous, the prothorax mottled with blackish, the elytra with the suture and 
an ante-apical line also black, the striz of the latter fine . . Species 2. 
