148 PHYTOPHAGA.—SUPPLEMENT. 
20 (zs). Pachybrachys marmoratus. (Tab. XXXIX. fig. 10.) 
Obscure fulvous, mottled with black, pubescent; thorax very finely and closely punctured, with four very 
obscure black bands; elytra finely and semiregularly punctate-striate, pubescent, with two obscure 
longitudinal black bands. 
Var. Thorax and elytra nearly black, the sides and apex of the latter obscure flavous. 
Length 2 lines. 
Head closely punctured, fulvous, a spot at the middle and the vertex, partly, black ; antenne short, the lower 
six joints fulvous, the two basal ones stained with black above, the terminal joints entirely black ; thorax 
twice as broad as long, the sides nearly straight and gradually narrowed in front, the posterior angles 
acutely pointed, the surface closely impressed with fine but deep oblong punctures, leaving a smooth 
central slightly raised line, and pale fulvous or ferruginous in colour, a longitudinal band on each side and 
another near the middle black, these bands partly obsolete and forming a M-shaped mark; scutellum 
narrowly transverse, fulvous, margined with black; elytra with irregular rows of fine punctures—the 
three nearest the suture more widely separated, the others closely approached in threes,—the interstices 
minutely punctured, the surface opaque, pale fulvous, and clothed with short pubescence, the sides and 
the disc with a broad obscure black band of unequal width; pygidium flavous; underside black, the 
abdomen more or less fulyous at the sides; legs fulvous, the femora with a black spot, the tibiz more or 
less black at the apex. 
Hab. Mexico, Pinos Altos in Chihuahua (Buchan-Hepburn). 
It is possible that this insect is closely allied to or even identical with P. analis, Lec. 
20 (c). Pachybrachys immaculatus. 
Black; above pale yellowish-grey ; head and thorax rather closely punctured, the latter with obsolete pale 
brownish bands; elytra semiregularly punctured, without markings; pygidium and last abdominal 
segment pale yellowish ; femora darker in the middle. 
Length | line. 
Hab. Mexico, near the city (H. H. Smith), La Parada (Salié). 
I cannot refer the two specimens obtained by Mr. Smith and a third from the Sallé 
collection to P. posticus, P. hepaticus, or P. pinguis, Suffr.: in these species the 
antenne scarcely extend beyond the base of the thorax, and their apical joints are 
thickened; in P. immaculatus they are of half the length of the body, and their apical 
joints although slightly thickened are elongate, not short. The thorax is punctured in 
such a way as to leave two narrow pale divisions between the darker portions in the 
shape of yellowish basal spots; the elytral punctuation is arranged, except near the 
suture, in semiregular rows almost throughout, and the entire surface is of a pale 
greyish or greenish-yellow colour without any spots. ‘These differences will help to 
distinguish P. immaculatus from its allies, including P. mexicanus; the latter has 
much more closely and irregularly punctured elytra than P. immaculatus. 
Pachybrachys bifasciatus (p. 71). 
Var. Elytra black, a spot near the basal margin, the lateral margin anteriorly, two spots placed transversely 
across the middle, and the apex, flavous. 
Hab. Mexico, Cordova (Sallé), Atoyac in Vera Cruz (H. H. Smith). 
This variety, at first sight, seems to be referable to another species, as its system of 
coloration is totally different from the banded type; I am, however, unable to find any 
