— 
218 -HETEROMERA. 
ally), joints 2-8 more strongly moniliform and 9 and 10 more strongly transverse, piceous, the basal joint 
a little lighter, 8-11 flavo-testaceous ; the prothorax a little longer than in 7’. brevicornis (about one half 
longer than broad), the constricted part very distiftctly canaliculate, the groove extending to the posterior 
but not to the anterior portion ; the elytra shorter and a little more convex than in 7’. brevicornis, more than 
twice as broad as the prothorax, with a rather deep transverse depression on either side of the suture 
below the base (the depressions almost confluent at the suture, and not extending outwards beyond the 
third row of punctures), the punctures distinctly arranged in rows towards the base, moderately coarse 
anteriorly, and becoming very much finer beyond the middle; beneath coloured as above; legs entirely 
flavo-testaceous, the femora moderately clavate. 
Length 27 millim. 
Hab. Mzxico, Cordova (Sallé). : 
One example, apparently a male. The black head and thorax, the stouter and more 
moniliform basal joints of the antenne, the more deeply canaliculate constricted part of 
the thorax, and the deeper post-basal depression and the more linear arrangement of 
the punctures of the elytra distinguish 7. monilicornis from T. brevicornis. 
5. Tomoderus brevicornis. (Tab. IX. fig. 27.) 
Short, moderately broad, rather convex, shining, brownish-testaceous or pale castaneous, the head, or the head 
and thorax, reddish-brown; the head and prothorax very sparsely, the elytra more thickly, clothed with 
long, semierect, silky pubescence. Head transverse, smooth; the eyes slightly prominent, somewhat 
- eoarsely granulated; antenne short, extending very little beyond the base of the prothorax, thickening 
outwardly, the basal joints (the first excepted) slender, and the ninth and tenth strongly transverse, 
piceous-brown or brown, with the three basal joints and the apical one, two, or three testageous ; 
prothorax narrower than the head, about one third longer than broad, smooth, very strongly constricted 
behind the middle, the posterior portion only a little narrower at the base than the anterior portion, the 
constricted part distinctly canaliculate and in some examples the anterior and posterior portions obso- 
letely so; elytra more than twice as broad as the prothorax, rather short, slightly rounded at the sides, 
widest at the middle, the usual post-basal depression obsolete or very faint, the surface irregularly 
punctured, the punctures deep and coarse at the base and gradually becoming finer towards the apex; 
beneath coloured as above ; legs flavo-testaceous or testaceous, the femora moderately clavate. 
Length 23-23 millim. (¢ 9.) 
Hab. Mexico, San Juan Bautista in Tabasco (Hége), Teapa (coll. Oberthiir, H. H. 
Smith); Guatemaua, El Reposo, Zapote, Tamahu, Chiacam (Champion). 
Not uncommon in Guatemala, on both the Atlantic and Pacific slopes; four specimens 
only from §.E. Mexico. Very much smaller than 7. canaliculatus; the thorax similarly 
shaped, but, at most, very obsoletely canaliculate (the constricted part only, as a rule, 
being channelled); the elytra more coarsely punctured at the base, the punctures 
showing a tendency to a linear arrangement; the legs entirely flavo-testaceous; the 
antennee more slender towards the base. The thorax is longer and the anterior 
portion is relatively narrower than in the North-American 7. interruptus, La Ferté, 
and 7’. constrictus (Say); in the majority of the specimens the anterior and posterior 
portions are without trace of amedian channel. 7. hirtulus, La Ferté, from Colombia, 
the type of which I have examined, is an allied species, but is a larger and broader 
insect than 7. brevicornis, and also differs in the form of the antenne. An example of 
the latter bears the MS. name of 7. flavipes, Deyr., in M. Oberthiir’s collection. 
