154 PHYTOPHAGA.—SUPPLEMENT. 
form of the spots on the thorax and also in the shape of the elytral bands; P. dubiosus, 
Lec., is described as having a diverging central thoracic band; P. othonus (Say) has a 
much more transversely-shaped thorax. 
34. Pachybrachys decoratus. (Tab. XX XIX. fig. 14.) _ 
Black ; the thorax closely punctured, the sides, and three spots in front and two at the base, obscure flavous ; 
elytra almost regularly punctate-striate, black, two spots at the base, two at the sides, three below the 
middle, and one at the apex pale flavous. 
Length 1 line. . 
Head flavous, the vertex and a central stripe black ; the lower portion of the face strigose-punctate, the upper 
portion finely punctured ; antenne extending a little beyond the base of the thorax, flavous, the three or 
four terminal joints distinctly thickened and darker ; thorax subcylindrical, transversely convex, the sides 
evenly rounded, the surface closely covered with deep and somewhat elongate punctures, the sides, the 
anterior margin (the extreme edge excepted), three short stripes in front, and an oblique spot on each 
side at the base flavous; scutellum black; elytra convex, with regular rows of punctures, the interstices 
flat, except at the sides, where two broader raised spaces are visible, the surface black, with seven pale 
flavous spots placed thus :—a round one near the scutellum, an elongate one within the shoulder, followed 
by two larger elongate spots placed close together, three shorter ones placed triangularly below the middle, 
and a transversely-shaped one at the sutural angle, and in front of this latter spot and close to the lateral 
margin is another very narrow short stripe; the pygidium has the sides flavous and the last abdominal 
segment is of the same colour ; legs fulvous, the femora with a black spot. 
Hab. Mexico, Juquila (Hoge). 
Of this well-marked species, differing in the sculpture and elytral pattern from any of 
its allies, only a single specimen was obtained. The two bright yellowish-white spots 
placed below the shoulder at the sides are the largest and are rather strongly raised ; 
the flavous-coloured anterior margin of the thorax is encroached upon by the black 
markings on the disc, which in front assume the shape of teeth. 
35. Pachybrachys eburifer. 
Pachybrachys eburifer, Suffr. Monogr. in Linn. Entom. Xvi. p. 394°. 
Hab. Guatemata, Paso Antonio (Champion); Panama, David, Caldera, Tolé (Cham- 
pion).—Gutana, Cayenne !. 
This is a small-sized species, some examples of which are less than one line in length. 
I cannot separate our specimens from one contained in the British Museum and named 
by Suffrian, whose description, except as regards the colour of the pygidium and under- 
side, agrees very nearly with the Central-American insect. In the latter the pygidium 
is yellow, with a central black, posteriorly pointed, stripe and narrow similarly-coloured 
margins (Suffrian describes it as brown with paler lower margin); the sides of all the 
abdominal segments are yellow (the underside of the type is described as black with 
the last abdominal segment pale); and the legs are pale brown, with the apex of all 
the femora pale yellow. The sculpture of the upper surface agrees entirely with that 
of the type, and the above differences are probably due to local variation. The specimens 
from Caldera and David are nearly all larger and of more uniform coloration, but agree 
in other respects. | 
