514 RHYNCHOPHORA. 
CQELOSTERN US. 
Celosternus, Schénherr, Cure. Disp. Meth. p. 284 (1826); Gen. Curc. iv. p. 198 (part.) ; Lacor- 
daire, Gen. Col. vii. p. 123. 
Lacordaire restricts this genus to C. compernis (Germ.) and its allies, one of which, 
C. tardipes, Boh., is a common species within our limits. These insects have the 
anterior legs of the male more or less elongated, and the anterior tarsi clothed with 
long, projecting hairs in this sex; the rostrum rather slender; the canal reaching the 
front of the metasternum ; the eyes very large; the antenne inserted at or behind the 
middle of the rostrum, the club elongate or oblong; the ventral segments 2—4 equal 
in length; the ocular lobes of the prothorax feebly developed; the femora clavate and 
usually bidentate, the anterior pair very stout and sometimes with one or more additional 
teeth. The alternate elytral interstices are sharply costate. 
1. Celosternus tardipes. (Tab. XXV. figg. 18, 18a, ¢; 1846, anterior 
tarsus, 3.) 
Celosternus tardipes, Boh. in Schénh. Gen. Cure. iv. p. 201’. 
Celosternus sulcatulus, Jekel, in litt.’. 
Hab. Mexico (ea coll. Flohr), Vera Cruz (Chevrolat+), Toxpam (Sallé), Jalapa, 
Cerro de Plumas (/ége), Teapa (H. H. Smith); GuaTEMALa, Panzos, Teleman, Chaco}, 
Senahu, and San Juan in Vera Paz, Volcan de Agua, Mirandilla, Pantaleon, El Tumbador 
(Champion); Costa Rica, La Uruca, San José, La Flor (biolley), Pozo Azul (Under- 
wood); Panama, Bugaba, Volcan de Chiriqui (Champion). 
A common insect in Central America, and there representing the southern C. com- 
pernis. In fully-developed examples the anterior femora have two small teeth exterior 
to the large one, and the latter serrate on its outer edge, and the other femora sharply 
bidentate; but in our long series of upwards of 100 specimens there are many (both 
g and 2) with the anterior and intermediate pairs simply bidentate, and the posterior 
pair unidentate. The upper surface is often set with intermixed erect scales, those on 
the elytra being clustered along each side of the cost. The male, which appears to 
be very much rarer than the female, has the anterior tarsi clothed on the inner side 
with long projecting fulvous hairs. The length varies from 54-9 millimetres. 
Six females from Chiriqui have a shorter rostrum and more elongate elytra, and 
they may belong to a different species. 
2. Celosternus acutidens, sp.n. (Tab. XXV. figg. 19,19 a, ¢; 198, anterior 
tarsus, ¢ .) 
Oblong-ovate, black, the antenne ferruginous; variegated above with fulvous, yellowish-white or white, and 
blackish scales (the whitish scales sometimes condensed into two faint vitte on the prothorax), with a 
few erect scales intermixed, the vestiture of the under surface and legs paler, the femora annulate. Head 
densely punctate, sometimes feebly, obliquely carinate on each side above the eyes, the latter very large 
