HAMOTUS.—CERCOCERUS. 9 
elongate, densely pubescent at their hind margin. Tibi pubescent externally ; those of 
the hind legs quite straight and slender, and without definite tuft of hairs at the extremity. 
Only one example was met with of this fine species; it forms a natural transition to 
the following. 
15. Hamotus grandipalpis. (Tab. I. fig. 4.) 
Piceo-sanguineus, pube elongata erecta dense vestitus; antennis, palpis pedibusque rufo-obscuris, illis elongatis 
gracilibus ; palpis maxillaribus maximis; capite gracili rostrato, vertice trifoveolato; abdomine segmentis 
dorsalibus quatuor conspicuis, longitudini subequalibus. 
Long. 33 millim. 
Hab. Panama, Volcan de Chiriqui 2000 to 3000 feet (Champion). 
Antenne with very long basal joint; the second, third, and fourth joints subequal, 
the fifth and sixth rather elongate, the seventh and eighth a little shorter, but each a 
good deal longer than broad, the ninth and tenth elongate but scarcely at all thicker 
than the preceding two, the tenth very long and slender and with its inner margin 
curvate. Palpi with very elongate second joint and very large terminal joint. Head 
with the strongly elevated antennary tubercles separated by a deep depression; with 
two fovew near the vertex, and a third depression behind these in the middle. Thorax 
rather large, subglobose; the basal fovea distinct, quite isolated. Elytra with deep but 
short intrahumeral depression. Hind body with the margins of the first and second 
segments very largely developed. Hind tibia without apical pencil. 
Only one example was met with of this species; it may be a male, as the depression 
on the metasternum is remarkably deep. Although the maxillary palpi are so strongly 
developed, I cannot treat this as a generic character at present, as there is very great 
variety in the size and form of these organs amongst the species of this genus inhabiting 
our region. 
CERCOCERUS. 
Circocerus, Motschulsky, Etudes ent. 1855, p. 16, and 1856, tab. f. 4; Leconte, New Sp. N. Am. 
Coll. p. 27 (1863). 
Cercocerus, Leconte, Class. Coi. N. Am. p. 57 (1861) ; Reitter, Verh. Ver. Briinn, xx. p. 186 (1882). 
The characters given of this genus show nothing to distinguish it from Hamotus, of 
which I have little doubt it is merely a synonym. As, however, I do not actually know 
either of the species ascribed to it, I give it a distinct place in deference to Reitter, who 
treats it as a valid genus. 
1. Cercocerus batrisoides. 
? Circocerus perplexus, Motsch. Etudes ent. 1855, p. 16°. 
Circocerus batrisioides, Motsch. Etudes ent. 1856, tab. f. 4. 
? Circocerus batrisoides, Lec. New sp. N. Am. Col. p. 27 (1863) *. 
Hab. Norta America, New Orleans 2,—Panama, Obispo }. 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, February 1887. C* 
