AT4 COLYDIIDA. 
strongly transverse, rounded at the sides, with upturned lateral margin studded with 
erect slender sete. Elytra short and convex, with very fine crenate strie ; the slender 
erect black sete very conspicuous. One example. 
Subfam. PYCNOMERINE. 
This appears to beadistinct and natural group. It has been thought by some to be 
allied to the Bothriderine, but there is very little really to connect the two. 
In the Pycnomerine, the insertion of the antenne is quite lateral, and the side of 
the epistome exhibits an incrassation over the articulation; nevertheless, the basal 
joint is but little concealed; the articulation of the second joint with the first is 
terminal. 
PYCNOMERUS. 
Pycnomerus, Erichson, Wiegm. Arch. 1842, 1, p. 214. 
Penthelispa, Pascoe, Journ. Ent. i. p. 111. 
This is an extensive genus and nearly cosmopolitan. I unite with it at present 
Penthelispa, Pascoe, which was separated solely on the club of the antenne consisting 
of two joints; but intermediate forms, in respect of this character, occur. 
1. Pycnomerus truquii. 
Penthelispa truquii, Pascoe, Journ. Ent. ii. p. 39’. 
Hab. Mexico (Truqui'), Jalapa, Las Vigas Hage), ¢ Orizaba, Jacale (Sallé); Guatz- 
MALA, San Ger6nimo, Purula (Champion). 
The undulation of the sides of the thorax is not so conspicuous as the original 
description might lead one to suppose; indeed in some specimens it can scarcely be 
detected. We have received a large series, exhibiting considerable variation in size 
and colour. 
2. Pycnomerus breviceps, sp.n. (Tab. XV. fig. 7.) 
Piceus, elytris pedibusque dilutioribus, depressus ; capite brevissimo, antennis crassis; prothorace -nitido, 
fortiter punctato, dorso bi-impresso ; elytris sat profunde striatis, striis minus conspicue punctatis. 
Long. 22-3 millim. 
Hab. Mexico, Tuxtla (Sallé), Jalapa (Hoge); GuatemMata, El Tumbador, Cerro 
Zunil, San Gerénimo (Champion); Panama, Volcan de Chiriqui 2500 to 4000 feet 
(Champion). 
Antenne short and thick, with a short abrupt club, having a very pubescent apex 
set also with a few short sete. Head very short, coarsely punctate, epistome much 
thickened, disc rather deeply depressed and indistinctly divided into two by a longitudinal 
