GONICLUS. 617 
In the male of this species the front of the head is flat, and there is only a short, 
obscure, somewhat curved elevation over the insertion of each antenna; there isa slight 
depression on the middle of the vertex. The species is readily identified by the much 
effaced punctuation of the elytra. The thorax is rather strongly transverse, the sides 
straight behind, a little narrowed in front; the hind angles are rectangular, not acute ; 
the sculpture is unusually fine, though there are numerous punctures on the discoidal 
portion ; the lateral sculpture is also much less marked than usual; there are no 
distinct lateral lines, and only an extremely short obscure line on the front margin on 
each side. ‘Two specimens. 
This species seems to be intermediate between G. angustus and G. segnis. It comes 
near G. angustus by the male characters, but it is less elongate, less parallel and 
transversely convex in form, and has the elytral punctuation less definite, and the 
thorax without lateral lines. It is narrower than G. segnis, and readily distinguished 
from it by the fine sculpture. 
29. Goniccelus laticollis, sp. n. 
Ovatus, posterius attenuatus, subdepressus, piceus, pube elongata vestitus, fortiter punctatus; prothorace 
fortiter transyerso, anterlus angustato. 
Long. 34 millim. 
Hab. Guatemata, Sinanja in Vera Paz (Champion). 
Of this species we have received only a single male specimen. It is very like a large 
G. arduus, but is clearly distinct. ‘The carine on the head do not extend to the vertex, 
but are each surmounted by a peculiar slight elevation, looking like a truncated 
tubercle ; the two minute acute elevations on the front of the thorax are placed close 
together. The thorax has the whole of the discoidal part closely and rather coarsely 
punctured ; it is slightly wider than the elytra, and is considerably narrower at the 
front angles than at the base; the hind angles are acute, and the base is but little 
lobed in front of the scutellum. The punctuation of the elytra is coarser than usual. 
The colour is dark, the antenne being blackish and the reddish tibie are piceous at the 
tips. The species bears a considerable resemblance in form to G. subtilis. 
30. Gonicelus arduus, sp. n. 
Oblongo-ovalis, depressus, rufo-obscurus, pube elongata vestitus, fortiter punctatus; prothorace fortiter 
transverso, linea marginali anteriore medio minus late interrupta. 
Long. 24-3? millim. . 
Hab. Guatemata, El Tumbador, Zapote (Champion); Panama, Volcan de Chiriqui 
2500 to 4000 feet (Champion). 
In this insect the male has on each side a longitudinal carina extending from the 
insertion of the antenna to the back of the head, while in the female there are the 
merest indications of these carine. G. arduwus is to some extent a connecting-link 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, Aprid 1900. 4 K* 
