TOMODERUS. 217 
flavo-testaceous; legs flavo-testaceous, the femora a little darker at the base, the latter moderately 
clavate. 
Length 22 millim. (¢.) ‘ 
Hab. Nicaracua, Chontales (Janson). 
One male example. This insect agrees closely with La Ferté’s description of 
TL. signaticornis * ; the thoracic groove, however, is much deeper (apparently as distinct 
as in the eastern 7’. su/cicollis, La Ferté) and the elytral punctuation finer. Compared 
with 7’. excavatus, the thorax is more deeply sulcate on the anterior portion, and the 
elytra are longer, much more finely punctured at the base, and have only a very shallow 
post-basal depression. ‘The last dorsal segment is truncate at the apex. 
8. Tomoderus complanatus. 
Short, moderately broad, rather depressed, sbining, reddish-brown, the elytra reddish-testaceous or testaceous 
with the disc of each indeterminately infuscate beyond the middle; the head and prothorax very sparsely, 
the elytra more thickly, clothed with long, semierect, silky pubescence. Head transverse, smooth, 
obsoletely canaliculate on the vertex ; eyes very small, not prominent, very finely granulated ; antenne 
short, slender at the base and thickening outwardly, the joints strongly moniliform, 9 and 10 strongly 
transverse, 1 ferruginous, 2-10 black, 11 testaceous; prothorax narrower than the head, about one fourth 
longer than broad, smooth, very strongly constricted behind the middle, the posterior portion a little 
narrower at the base than the anterior portion, both finely canaliculate; elytra more than twice as broad 
as the prothorax, short, rather depressed, widest a little before the middle, the usual post-basal depression 
large and rather deep (extending outwardly to the humeri), the surface confusedly punctured, the punctures 
moderately fine at the base and becoming very much finer and shallower beyond the middle; beneath 
dark reddish-brown ; legs testaceous, the femora moderately clavate. 
Length 2} millim. 
Hab. Mexico, Jalapa (Hége). 
Two examples. The small and non-prominent eyes, the finely but distinctly canali- 
culate thorax, and the large post-basal depression of the elytra separate 7. complanatus 
from 7’. monilicornis and T. brevicornis. The elytra are more finely punctured at the base 
than in 7. brevicornis, and the post-basal depression is much more extended than in 
T. monilicornis; the punctuation is confused, and shows scarcely any trace of a linear 
arrangement. ‘The vertex is distinctly canaliculate in one example, very obsoletely so 
in the other. The thorax is considerably shorter than in 7. monilicornis, and the 
anterior portion is rather broader than the posterior portion (more distinctly so in one 
specimen). The North-American 7. interruptus, La Ferté, is an allied but _consider- 
ably larger species. | 
4. Tomoderus monilicornis. 
Closely allied to 7’. brevicornis. The head and prothorax pitchy-black, the former testaceous in front, the elytra 
castaneous ; the eyes rather prominent; the antenne stouter than in 7’. brevicornis (the basal joints especi- 
* This species is represented in the La Ferté collection by an example of the N.-American T’ interruptus ; 
the type is apparently lost. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 2, October 1890. OFF 
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