22 MALACODERMATA. 
Hab. Guareaana, Zapote (Champion) ; Panama, Matachin (Thieme). 
Not only differs from P. thoracicus by the absence of the fascia, but is also slightly 
more parallel; the front of the thorax is often emarginate, sometimes with a small 
notch ; the carina is very obsolete, scarcely ever to be traced, and, when present, not 
divided. 
There is a fine series in M. R. Oberthiir’s collection. I have only seen one from 
Guatemala. 
11. Plateros terminalis. 
Nigro-fumosus, subparallelus, opacus, prothoracis lateribus, striga humerali, et antennarum apice flavis, 
elytris punctato-striatis. Long. 63 millim. 
Hab. Guatemaua, San Juan, Vera Paz (Champion) ; NIcaRracua, Chontales (Belt). 
Only three specimens have come under my notice of this very distinct insect. ‘The 
head, antennz, legs, and body are black, with the exception of from one to three joints 
at the apex of the antenne (the number seems variable): the antenne are serrate, the 
width of each joint increasing towards the middle. The thorax has the disk black from 
base to front, the carina visible, the basal channel short; the front is rounded, the 
sides are sinuate, the base notched. The elytra are evenly and strongly crenate-striate. 
12. Plateros parallelus. (Tab. IT. fig. 19.) 
Niger, nitidus, elongatus, parallelus, prothoracis marginibus lateralibus et frontali rufo-testaceis, basi in medio 
elevata et excisa; elytris coriaceis, substriatis. Long. 6-9 millim. ¢ 2. 
Hab. Mexico, Cordova, Oaxaca (Sallé); British Honpuras, Rio Hondo (blan- 
caneauz); GUATEMALA, San Gerdnimo, Zapote (Champion) ; Nicaracua, Chontales 
(Janson). 
The elongate parallel form of this insect will cause it to be recognized. The antenne 
have the second small joint yellow, and the basal one tinged with yellow and pitchy. 
The elevated and notched centre of the basal margin is a character which obtains in 
other species of the genus, as P. isthmianus, but in a less degree. The Zapote examples 
are usually smaller and have yellow shoulder-stripes ; but they agree too nearly with 
those from San Gerdénimo for me to attempt their separation. It 1s, moreover, one of 
the latter variety that M. Bourgeois has returned to me with the name here adopted. 
13. Plateros striatus. 
Niger, prothoracis lateribus rufis, elytris crenato-striatis. Long. 53-6 millim. 
Hab. Mexico, Juquila (Sallé); Guatemaua, Capetillo, Duenhas (Champion). 
Var, Elytris linea minuta humerali rufa. (P. marginellus, Macleay.) 
Hab. GUATEMALA, Zapote (Champion) ; Panama, Matachin (Zhieme). 
