108 HEMIPTERA-HOMOPTERA. 
1. Pseudhelicoptera nasuta, sp.n. (Tab. XI. figg. 18, 18a, d.) 
Subparallela, vertice fusco, fronte clypeoque testaceis, oculis brunneis testaceo circumcinctis ; pronoto scutello- 
que ferrugineis, carinis dilutioribus; tegminibus brunneis, unicoloribus, venis elevatis apicem versus 
testaceis ; pedibus dilute testaceis. 
Subparallel, brown, with the front parts more or less ferruginous ; forehead and clypeus testaceous, the former 
much narrowed towards the vertex; scutellum plainly tricarinate ; tegmina with strong veins, which are 
brown in front and more or less testaceous towards the apex; legs light testaceous. 
Long. cum vertice 7 millim. (sine vertice 5 millim.); lat. ad hum. 2 millim. 
Hab. Paxama, Volcan de Chiriqui (Champion). 
In the shape of the head this species differs entirely from Helicoptera, and this 
character and the numerous and regular apical areas of the tegmina seem to place it 
in a position somewhat remote from that genus; but the overlapping tegmina and the 
similarity of the general venation, as well as the tricarinate scutellum and general 
facies, appear to justify its being included near it. 
PLECTODERES. 
Plectoderes, Spinola, Ann. Soc. Ent. Fr. viii. p. 328 (1829). 
Spinola placed this genus among his subfamily Cixioides and Elidiptera ( Helicoptera) 
among the Dyctiopharoides, on the ground that the latter had a cephalic protuberance, 
while in the former it was wanting. As a matter of fact, the genera are very closely 
allied, and intermediate forms occur. In Plectoderes, however, the vertex is decidedly 
shorter and broader than in Helicoptera, and the veins of the tegmina, as a rule, but 
not always, are fine and not conspicuously raised, as is often the case in the latter 
genus. ‘The tegmina overlap behind in both genera, and the posterior tibie are 
furnished with one small tooth towards the base, which is sometimes very minute and 
inconspicuous. . | 
1. Plectoderes championi, sp. n. (Tab. XI. figg. 19, 19 a.) 
Castaneo-brunneus, vertice brevi, ante oculos paullo producto, lato, rectangulo, carinato ; fronte lateribus fere 
parallelis ; pronoto scutelloque distincte tricarinatis ; tegminibus amplis, brunneis, ad latera dilutioribus, 
maculis quibusdam parvis testaceis notatis; alis fumatis ; pedibus piceo-testaceis. 
A large, rather broad species, of a castaneous-brown colour, with the forehead, the sides of the tegmina, and 
the abdomen somewhat lighter ; vertex short, straight in front, rectangular, slightly produced before the 
eyes, which are prominent and round and flattened underneath ; head with the eyes about as broad as 
the pronotum ; pronotum and scutellum distinctly tricarinate ; tegmina ample, brown, with several small 
testaceous dots and dashes on the disc, the apical third unicolorous ; legs pitchy testaceous. 
Long. cum tegm. 9 millim.; lat, ad hum. 3 millim. 
Hab, Guatemata, Senahu in Vera Paz, Cerro Zunil (Champion). 
Two female specimens. We figure the one from Senahu, the other from Cerro Zunil 
being somewhat differently shaped. 
