LYCODERES.—GERRIDIUS. 165 
This species appears in some points to be allied to L. ductans, Stal, but, to judge 
from the description, it is evidently quite distinct on account of the formation of the 
pronotum above the scutellum. 
2. Lycoderes serraticornis, sp.n. (Tab. X. figg. 10, 10 a.) 
Griseo-testaceus, capite sat magno, oculis prominulis; pronoto sat fortiter, sed haud profunde punctato, 
antice in cornu magnum, porrectum, parallelum, utrinque plus minusve distincte unicarinatum, lateribus 
sparsim serratulis, apice bilobato, productum, processu postico angusto longo fere recto apicem clavi vix 
tangente ; scutello obtecto; tegminibus pone processum posticum oblique ad apicem truncatis, hyalinis, 
venis testaceo-brunneis, vix parte tertid opaca fortiter punctaté; pedibus abdomineque testaceis vel plus 
minusyve nigricantibus. 
Broader in proportion than the preceding, of a griseous-testaceous colour, with the centre of the head and 
sometimes the hinder parts of the dorsum obscurely fuscous; pronotum produced in front into a long 
and stout, porrect, and very slightly deflexed horn, which is distinctly though sparingly serrate at the 
sides and bilobed at the apex ; the sculpture of the horn and for the most part of the pronotum is rugose, 
but not deep; the posterior process is long and almost straight and reaches just to the apex of the clavus, 
from which point the tegmina are obliquely truncate to their extreme apical angle, which is obtusely 
rounded in a broad angle ; the tegmina are hyaline-brown, opaque and punctured at the base, with the 
veins testaceous-brown, and the apex irrorated with ferruginous dots; legs and abdomen testaceous, often 
more or less infuscate ; the bodies of several specimens are more or less sprinkled with a white secretion. 
Long. cum tegm. 9 millim.; lat. int. hum. 2 millim. 
Hab. Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 
Several specimens. In our collection there is a broken specimen of another species, 
also from Bugaba, which is apparently closely allied to the one just described, with the 
tegmina more punctured and the posterior process of the pronotum differently shaped ; 
the anterior horn, however, is broken off. 
GERRIDIUS, gen. nov. 
Elongatus, subparallelus, capite magno ante frontem late triangulariter producto, ocellis inter se quam ab 
oculis evidenter magis distantibus ; pronoto simplici postice latissimo, humeris vix prominulis, antice 
sensim angustato, basi levissime rotundata, processu postico prorsus deficienti ; scutello magno, triangulari, 
postice protuberantié magna lata erecté instructo, margine hujus antica sinuatim declivi, posticd recta ; 
tegminibus nitidis, levibus, areis apicalibus quinque, discoidalibus duabus, plerumque oblongis, haud 
detlexis ; alis areis apicalibus quatuor, secundé oblonga haud stylaté; pedibus posticis elongatis, tibiis 
prelongis leviter curvatis. 
Oblong, subparallel ; head large, triangularly produced in front; ocelli situated on a line drawn through the 
centre of the eyes, evidently more distant from each other than from the eyes ; pronotum simple, without 
horns or prominences, broadest a little before the base, which is very gently rounded, very gradually 
declivous, with the broad posterior margin of the front of the head covering the apex of the metopidium ; 
scutellum very large, triangular, furnished with a large upright protuberance behind, which in front is 
declivous and has its hinder margin straight at right angles to the dorsum ; tegmina tectiform behind the 
scutellum, very smooth and shining, with five apical and two discoidal areas, which are for the most part 
oblong and have the veins running parallel to the margins ; wings with four apical areas, the second being 
oblong and not stylate ; posterior legs elongate, with the tarsi very long, recurved. 
This genus appears to be closely related to Lamproptera in certain points, but differs 
