468 RHYNCHOPHORA. 
Three specimens. The angularly dilated intermediate and hind tibie, and the 
angulate white subapical fascia of the elytra, readily distinguish 7. leucozona. In one 
example the elytral fascia is interrupted, and in another the curved brownish streak 
on each side of the disc of the prothorax encloses a cruciform fulvous patch. 
9. Tylodinus cavicrus, sp.n. (Tab. XXIII. figg. 4, ¢; 4a, front leg.) 
Oblong-ovate, narrow, slightly shining, black, the antenne and tarsi ferruginous; sparsely clothed with dark 
brown scales, the prothorax with a few fulvous scales intermixed, the vertex with a transverse white 
patch, the legs with scattered white sete. Head and the base of the rostrum densely, rugulosely punc- 
tate, the outer half of the latter almost smooth ; antennew inserted at the middle of the rostrum, joints 1 
and 2 of the funiculus snbequal in length, 3-7 short, the club stout, ovate. Prothorax about as long as 
broad, abruptly narrowed and constricted in front, slightly hollowed at the base, the apical portion 
tubulate ; closely, rugulosely punctate, the narrow interspaces on the disc raised and crescentiform, the 
dise itself swollen on each side of the median sulcus. LElytra oblong, subparallel, narrowed at the base 
and there very little wider than the prothorax, produced at the apex, the base feebly bisinuate ; inter- 
ruptedly seriate-punctate and finely granulate, each elytron with seven Jarge rounded or oblong 
prominences on the disc, the outer posterior one the largest. Femora unidentate. Anterior and 
intermediate tibia bowed inwards at the apex, acutely dentate on the inner side beyond the middle, the 
space between this and the tip being very deeply excavate. 
Length 54, breadth 24 millim. (<.) 
Hab. GUATEMALA, Quiché Mountains 7000-9000 feet (Champion). 
One specimen. The peculiar form of the anterior and intermediate tibie is doubtless 
a sexual character. 
10. Tylodinus callosus, sp. n. 
Oblong-ovate, rather narrow, shining, black, the antenne and the tips of the tarsi ferruginous; thickly clothed 
with moderately coarse brownish scales, which become fulvous in colour at the sides of the prothorax 
behind, and also sparsely set with short, semierect sete, the legs setulose. Head and base of the rostrum 
closely, the rest of the latter very sparsely, punctate; antenne inserted a little behind the middle of the 
rostrum, joints 1 and 2 of the funiculus subequal in length, the club ovate. Prothorax as long as broad, 
narrowed and constricted in front, subtruncate at the base ; closely punctate and subgrannlate, the disc 
depressed down the middle behind. Elytra subparallel in their basal half, constricted at the base and 
there not wider than the prothorax, gibbous, the sides vertical, the apex produced ; interruptedly seriato- 
foveolate and sparsely granulate, each elytron with six oblong or oblique prominences arranged in a double 
series on the disc, the posterior two large and transversely coalescent at the commencement of the 
apical declivity, which is abruptly declivous. Legs rather long, the femora unarmed, the anterior tibix 
strongly sinuate. 
Length 33, breadth 14 millim. 
Hab. Mexico, Jalapa (Smith). 
One specimen, given us by Mr. H. F. Wickham. The subparallel, gibbous, laterally 
compressed, nodulose elytra, with large transversely-confluent tubercles at the com- 
mencement of the apical declivity, sufficiently distinguish 7. callosus. The short 
metathoracic episterna are exposed as in the preceding species, otherwise the insect 
might be placed in Acalles. 
