PACHYBRACHYS. 145 
approached, the interstices thus appearing narrower in places. The entire surface of 
the elytra is varied with longitudinal flavous or brown markings, a character that will 
principally distinguish P. brunneo-maculatus from its allies. The ten specimens 
obtained do not show any variation of importance. 
16 (8). Pachybrachys juquilensis. (Tab. XX XIX. fig. 7.) 
Dark brown below ; above flavous; thorax extremely closely and finely punctured, with obscure flavous lateral 
and central markings; elytra with deep and regular rows of punctures at the sides, the interstices costate, 
a spot on the shoulder, two short transverse bands at the sides, and a spot near the scutellum, dark brown 
or black; pygidium flavous; legs fulvous, spotted with pale yellow. 
Length 1? line. 
Hab. Mexico, Juquila (Hége). 
P. juquilensis seems most nearly allied to P. brunneo-maculatus, from which it differs 
in the thorax being very closely punctured and also devoid of the oblique lateral groove 
(distinctly visible in P. brunneo-maculatus). The entire upper surface is opaque and of 
a pale flavous colour. ‘The fine and pale brown punctures of the thorax are arranged in 
such a way as to leave at the base (in plainly-marked specimens) a narrow lateral flavous 
line and a short central similar stripe. The elytra are very regularly and deeply punc- 
tured almost throughout, only a small sutural space being (as usual) more irregularly 
punctate; the three lateral transverse spots and an oblique mark surrounding the 
scutellum are very distinct and of dark brown or nearly black colour, these markings 
being much more decided and plainly visible than in any other species of the genus 
known to me. The pygidium is flavous (sometimes with an obscure central stripe), the 
underside is brown, and the femora are fulvous with the usual whitish spots. 
The distinct spots of the elytra being placed on a pale opaque ground-colour and the 
closely and finely punctured thorax will assist in the recognition of the present insect, 
of which both sexes were obtained by Herr Hége at Juquila. 
Pachybrachys cribellatus (p. 70). 
Pachybrachys uniformis, huj. op. p. 70. 
To the localities given, add:—Mexico, Teapa in Tabasco (H. H. Smith). 
A close examination of many more specimens lately received seems to prove that 
P. uniformis, Jac., cannot be considered as distinct from P. cribellatus, Suffr. The 
species varies much in size ; the male insect, which was unknown to Suffrian, does not 
differ materially from the female. The thorax of P. cribellatus is stated to be “ rather 
closely punctured ”: I must apply the term “extremely closely” to our insect, which 
in all other respects agrees with Suffrian’s description. 
19 (a). Pachybrachys salle#i. (Tab. XXXIX. fig. 8.) 
9. Black; above reddish-brown ; thorax strongly transverse, very closely punctured, with a central and two 
BIOL. CENTE.-AMER., Coleopt., Vol. VI. Pt. 1, Suppl., October 1889. u 
