PTERICOPTUS. 111 
PTERICOPTUS. 
Ptericoptus, Serville, Ann. Soc. Ent. Fr. 1835, p. 61. 
This genus is one of the members of Lacordaire’s group Ptéricoptides, a highly arti- 
ficial assemblage of genera which cannot conveniently be maintained. It is a rather 
aberrant form of Apomecynini, but is better placed in this group than in the following, 
from which it differs by its broad forehead, small, deeply-divided eyes, and short thick 
antenne. It is peculiar to America; and the species, seven of which are now known, 
have a great general resemblance to each other. 
1. Ptericoptus caudalis. 
Postice rectilineatim angustatus ; elytris apice late truncatis, angulis exterioribus elevatis et prolongatis. Carneo- 
fulvus, vittis duabus approximatis a vertice usque ad mediam suturam elytrorum extensis nigris; elytris 
dimidio apicali et vitta submarginali necnon guttis lineolisque discoidalibus atrofuscis, macula curvata 
transversa alteraque apicali carneo-fulvis ; capite thoraceque lateribus late nigro-vittatis ; antennis apicem 
versus nigris, articulo 8° (apice excepto) carneo-griseo. 
Long.6 lin. o. 
Hab. GuateMata, Zapote (Champion). 
Apparently much resembling P. cruentatus, Thoms., from Cayenne, from the descrip- 
tion of which it differs in the distribution of the markings. The gradually narrowed 
elytra and the much produced exterior angles of the truncature, in the ¢, distinguish 
it from all other known species. 
There is in M. Sallé’s collection from Mexico a ¢ example which may probably be 
referred to this. It is larger (8+ lines) and more uniformly pinkish brown on the elytra. 
The most notable feature, however, is the simple oblique truncature of the elytra. 
2. Ptericoptus griseolus. 
Olivaceo-griseus, vittis duabus a vertice usque ad mediam suturam elytrorum extensis olivaceo-fuscis ; thorace 
lateribus singulatim vittis duabus elytrisque passim vittis,macularibus olivaceo-fuscis, his apice late fere 
recte truncatis; antennis griseis, articulis a tertio apice olivaceo-fuscis. 
Long. 6 lin. 
Hab. Guatema.a, Capetillo (Champion). 
3. Ptericoptus panamensis. 
Olivaceo-griseus, verticis macula vittisque thoracis duabus fere conjunctis fuscis; elytris vitta suturali fusca 
indistincta, fascia lata ante apicem nigra, disco immaculatis, apice sinuato-truncatis, angulis exterioribus 
paullo productis; antennis brevibus, apicem versus valde angustatis, scapo abbreviato, articulisque 3°-7™ 
crassis ; pedibus brevissimis, tibiis (preecipue posticis) brevibus mox a basi usque ad apicem dilatatis. 
Long. 43 lin. ¢. 
Hab. Panama, Matachin (Schunke). 
