CERATOPUS. 123 
Group CERATOPINA. 
Cératopides, Lacordaire. 
This group seems to me to be nearly allied to the Erirrhina, from which it is widely 
separated by Lacordaire. 
CERATOPUS. 
Ceratopus, Schénherr, Gen. Cure. vii. 2, p. 120 (1843) ; Lacordaire, Gen. Col. vi. p. 591. 
Acanthobrachium, Boheman, Freg. Eug. Resa, Ins. p. 128 (1859) ; Lacordaire, loc. cit. p. 592. 
The various new forms now described show that Ceratopus and Acanthobrachium 
cannot be maintained as distinct, the only difference (following Lacordaire) being the 
ereater extension of the scrobes posteriorly in the latter. They are easily recognizable 
by the very large triangular tooth on each of the femora and the appendiculate tarsal 
claws. The genus is peculiar to Tropical America, ranging from the Mexican State of 
Vera Cruz to Brazil. The seven species here enumerated may be grouped thus :— 
a. Scrobes becoming shallow or evanescent beneath the rostrum posteriorly, thus 
appearing confluent behind; tibial claw short or absent. [CrRartorus sensu 
stricto. | 
a’, Antennal club ovate, not longer than the last four or five joints of the funiculus 
united 2... 1 wee ee ee ee eee ee we ew e).) «Species 1-5. 
', Antennal club elongate-ovate, as long as the whole of the funiculus. . . . Species 6. 
&. Scrobes reaching the base of the rostrum beneath and there separated by a very 
narrow ridge ; tibial claw rather long. [AcanrHopracuium, Boh.] . . . . Species 7. 
1. Ceratopus bisignatus. (Tab. VIII. figg. 4, 4a, 2.) 
Ceratopus bisignatus, Boh. in Schéunh. Gen. Cure. vil. 2, p. 121°. 
Hab. Mexico, Vera Cruz (ex coll. Chevrolat'), Jalapa (Hoge); British Honpuras, 
Rio Hondo (Blancaneaus). 
The type of this species, communicated by Dr. Sjéstedt, of the Stockholm Museum, 
is a male, and has the first ventral segment broadly depressed down the middle. Four 
specimens have been received by us. 
2. Ceratopus subfasciatus, sp. n. (Tab. VIII. figg. 5, 54, 2.) 
Elongate-ovate, shining, piceous, the basal half of the antenne rufescent ; somewhat thickly clothed with small, 
oblong, intermixed, cinereous and brown scales, the darker scales forming two incomplete fascize and 
various spots or streaks on the elytra, the latter with a small pale ochreous spot (surrounded by brown 
scales) on the fifth interstice towards the apex ; the squamosity of the under surface cinereous. Head 
closely, minutely punctate; rostrum elongate, twice the length of the prothorax, finely punctured at the 
sides towards the base, and there carinate, for the rest smooth and shining; antenne inserted slightly 
before the middle of the rostrum, joint 1 of the funiculus about twice as long as 2, the club nearly as 
long as joints 4—7 united. Prothorax transverse, narrowed and slightly constricted in front, the sides 
subparallel behind; closely, finely punctate, except along a narrow space down the middle. Elytra 
oblong, moderately elongate, about one-half wider than the prothorax, subtruncate at the base, flattened 
RR 2 
