108 MALACODERMATA. 
EURYOPA. 
Caput breve, collo haud exserto. Antenne 11-articulate, articulo pasali valido, secundo perbrevi, tertio ad 
decimum filamentis binis pubescentibus instructis, undecimo longo simplici. Palpi maxillares articulo 
ultimo precedenti subsquali, ovato. Mandibule parvee, haud falcate. Oculi magni, subtus fere contigui. 
Prothorax equalis, transversus, angulis posticis haud productis, rectis. Elytra, corporis dimidio squalia, 
postice attenuata, non subulata. Als ample, corpus superantes. Abdomen (maris?) segmentis ventralibus 
septem et genitali; segmentis brevibus et postice angustioribus. 
Type Euryopa fusca. 
This genus differs from Phengodes in the shorter antennee, which have the filaments 
decreasing in length as they approach the tenth joint ; the palpi are shorter. The head 
is quite of a different shape, not prominent in front, nor excavated between the eyes. 
The mandibles are inconspicuous. The eyes are large, globular, nearly meeting 
beneath, separated by a smooth space above, equal in width to one eye. The thorax 
has no thin expanded margin as in Phengodes. The elytra are not so rudimentary ; 
when closed they diverge but a little, their suture and margins a little thickened and 
ciliated. 
I have not seen either Pterotus, Leconte, or Bawoscelis, Spinola. The reduction of 
the mandibles seems to afford sufficient distinction, however, from either of those 
genera. 
Four species from Central America are referable to the genus. 
1. Euryopa fusca. 
Fusca, nitida, capite nigro, prothorace et subtus subtestacea, antennis floccosis, elytris longitudine vix 
eequalibus. Long. 8 millim. 
Hab. Mexico, Cordova (Sallé). 
Head pitchy black, crown shining, punctured; antenne pale fuscous, much shorter 
than in Phengodes, but with similar filamentary rami from the bases of joints 3-10; 
palpi and mouth fuscous. Thorax wider than long, the front angles much depressed, 
the lateral margins sharp and conspicuous but not expanded; prosternal region not 
much developed; the disk shining, almost glabrous; the base slightly sinuous, hind 
angles a little wider than right angles. Elytra longer than half the body, but by no 
means covering the ample wings, which reach beyond the apex of the abdomen. The 
former are soft in texture, of a uniform fuscous, obsoletely impressed, without visible 
nervures; their external margins as well as the sides of the thorax are furnished 
with soft brown cilia; and a very short but erect pubescence covers most of the whole 
insect. The underside and legs are yellowish fuscous. 
This singular beetle is allied to Phengodes; but the head with large eyes and the 
thorax remind one of those of Luciola. The segments of the abdomen are not only 
not so compressed and extended as seems usual in Phengodes, but are much shorter, 
only passing the posterior femora by a little. The eighth or genital segment consists 
