63 
eating Coleoptera. The tubercle at the tip of the sixth anten- 
nal joint of the males is much larger in this species than in L, 
araneiformis. The figure given in Whitens Catalogue represents 
a female. 
Genus Leptostylus. 
Leconte, Journ. Acad. Nat. Sc. Philad. n. s. ii. p. 168. 
Syn. Amniscus, Dej. Cat. (part.). 
The chief characters given by Leconte as distinguishing this 
from the allied genera are the shortness of the basal joint of the 
posterior tarsi and the tuberculose surface of the thorax, whose 
sides are simply prominent instead of being armed with a tooth 
or spine. The genus consists of a number of small-sized species 
more nearly allied to Lagocheirus than to Leiopus and Acantho- 
cinus, being of compact, oval, convex form, and having short 
legs with thighs abruptly clavate. The basal joint of the poste- 
rior (as well as the other) tarsi is scarcely longer than the second; 
the thorax is very much narrower than the elytra, and its surface 
is studded with obtuse tubercles, the lateral tubercles in some 
of the species being scarcely visible, and in none spiniform : the 
elytra are also tuberculated or uneven, and are not spined at 
the apex. Most of the species which I have examined have the 
basal joint of the antennse much flattened beneath ; and in all, 
the apex of the same joint is produced beneath into a short 
tooth. The elytra are generally fasciculated, but have not very 
distinct centrobasal ridges. 
Leptostylus appears to be closely related to Lrphcea of Erichson 
(Consp. Ins. Peruana, p. 144), differing chiefly in the absence of 
acute lateral thoracic tubercles. 
1. Leptostylus pleurostictus, n. sp. 
L. oblongo-ovatus, subcoiivexus, tomento cinereo-brunneo vestitus : 
thoracis dorso quinquetuberculato : elytris multifasciculatis, lateri- 
bus macula magna nigro-fusca ornatis. Long. 4| lin. 
Head clothed with tawny-brown pile. Antennae not much 
longer than the body, brown ; basal joint (except the tip) and 
base of the remaining joints grey. Thorax with five distinct 
dorsal tubercles ; the lateral tubercles short, conical, obtuse, and 
accompanied, near the front angle on each side, by a smaller one : 
greyish or hoary, a lateral spot behind the tubercle dark brown. 
Elytra ovate, not narrowed before three-fourths of their length ; 
apex very briefly, obtusely, and obliquely truncate : surface coarsely 
punctured (except near the tip), and furnished with numerous 
small tubercles arranged in three irregular rows, and surmounted 
each by a pencil of short bristles pointing towards the apex : the 
colour is ashy or greyish brown, a large dark brown patch occu- 
