LYTOPEPLUS. 495 
greater separation of the front and middle coxe, and by the accurate co-adaptation of the 
hind portion of the prosternum in the middle and the front of the mesosternum. The 
head is very retractile, so that it can be, in repose, almost entirely withdrawn into the 
thorax. The club of the antenna has no visible sutures, but it looks as if it might be 
composed of three joints—an appearance due to the arrangement of the pubescence. 
The hind margin of the prosternal process is gently curved ; it is not received into any 
cavity of the mesosternum. The mesosternum has between the cox an exposed portion 
brought up to the level of the metasternum; in front of this it is perpendicular, and 
then again is continued forwards horizontally; thus it forms a sort of step—like the 
step of a stair; the front edge of its posterior part is wider than the prosternal process, 
but has a corresponding curvature, and this curvature the edge of the prosternal 
projection reposes against. ‘The hind coxe are rather large, and the abdominal 
process behind them exhibits a quite straight transverse truncature in front. The 
basal three joints of the tarsi are short, and from the first of them there projects a 
long delicate pencil of two or three hairs. 
1. Lytopeplus compactus, sp. n. (Tab. XV. fig. 23.) 
Ovatns, piceo-ferrugineus ; antennis pedibusque testaceis; prothorace polito, parce obsolete punctato, sub- 
levigato ; elytris seriebus abbreviatis punctorum. 
Long. 2-27 millim, 
Hab. GuatEMaLa, Totonicapam 8500 to 10,500 feet (Champion). 
Head very obsoletely punctate; eyes very small, but prominent. Antenne with oval 
club, the base of which is glabrous; then there is a band of pubescence, while the apex 
is largely pubescent and bears several long sete. Thorax much narrowed in front, 
very definitely but finely margined at the sides; the base very feebly broadly lobed in 
the middle; the surface with a few fine distant punctures, and also very delicately 
alutaceous. Scutellum distinct, small. Elytra with series of rather fine punctures, 
which are absent from the sides and apex; the surface shining, but when cleaned and 
viewed with a high power found to be studded with excessively minute, remote, erect 
sete. Legs slender; under surface almost impunctate. Our specimens of this species 
were found under the bark of pines. 
Subfam. DISCOLOMINA. 
This little group is characterized by the three-jointed tarsi and by the exposed 
insertion of the antenne. Some of the Tarphiine have likewise three-jointed tarsi, 
but in them the insertion of the antenne is concealed. The palpi are, I believe, very 
varied in their development in this small group, which consists of three genera only, 
viz. Discoloma, Holophygus, and Notiophygus. 
