PLECTODERES, 109 
2. Plectoderes basalis, sp. n. (Tab. XI. figg. 20, 20a.) 
Multo minor, subparallelus, angustior ; vertice fronteque testaceis vel rufo-testaceis, illo perbrevi ante oculos 
haud producto, hac lateribus subparallelis, oculis vix prominulis; pronoto scutelloque tricarinatis, hoc 
testaceo vel rufo-testaceo, apice dilutiori; tegminibus longis, subparallelis, griseo-brunneis, basi anguste 
dilute testaced ; pedibus testaceis. . 
Mas segmento ultimo ventrali fortiter carinato, carina ad medium producta, stylis magnis apicem versus tortis. 
Much smaller than P. championz, subparallel, with the vertex and frons testaceous or rufo-testaceous; head 
narrower than the pronotum; vertex very short, not produced before the eyes, and not rectangular ; 
forehead with the sides subparallel; eyes scarcely prominent, flattened underneath; pronotum and 
scutellum testaceous or rufo-testaceous, tricarinate, the latter lighter at the apex; tegmina long, greyish- 
brown, with fine veins, and with the base narrowly and sharply testaceous, this colour passing across the 
apex of the scutellum; legs testaceous. 
Male with the last ventral segment of the abdomen longitudinally depressed, strongly carinate in the centre of 
the depression, and produced, with the styles short, large, and somewhat twisted towards the apex. 
Female with the last ventral segment simple. 
Long. cum tegm. 6-64 millim.; lat. ad hum. 14-2 millim. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
3. Plectoderes excelsus, sp.n. (Tab. XI. figg. 21, 21a.) 
Quoad staturam formamque precedenti affinis, elongatus, subparallelus; vertice brevi, rectangulari, carina 
media late fusca, fronte nigro-maculata ; pronoto brevi, ad medium fusco ; scutello testaceo, vittis utrinque 
nigris; tegminibus griseo-brunneis, venis testaceis; alis fumatis ; pedibus testaceis. 
Very like the preceding, but with the head more produced before the eyes and rectangular ; head and pronotum 
testaceous, with a central dark line, the forehead spotted with black; scutellum testaceous, with a 
conspicuous broad black band on each side of the central portion, the extreme sides light testaceous ; 
tegmina griseous-brown, with fine testaceous veins; legs testaceous. 
Long. cum tegm. 63-7 millim.; lat. ad hum. 13-2 millim. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith) ; Guatema.a, Cerro 
Zunil 4000 to 5000 feet (Champion). 
Several female specimens. The one from Cerro Zunil has the front parts almost 
unicolorous, but it must apparently be referred to this species. An example from 
Omilteme is figured. 
4. Plectoderes flavovittatus, sp.n. (Tab. XI. figg. 22, 22 a.) 
Sat brevis, subparallelus, niger, opacus, rufo-flavo vittatus; vertice perbrevi, ante oculos prominulos vix 
producto, rectangulari, carinato ; fronte lata, leviter sed distincte sculpturaté, haud carinataé; scutello 
fortiter tricarinato ; tegminibus parallelis, opacis, venis distinctis ; alis nigris; pedibus nigrescentibus. 
A very distinct, small species, subparallel; head with the eyes about as broad as the pronotum, the vertex 
very short, the forehead rather short and broad, finely but distinctly sculptured; scutellum plainly 
tricarinate; the upper surface black, with a broad orange band running across the disc behind the eyes, 
and a broader one occupying the greater part of the basal half of the tegmina, the veins of the latter 
fine but distinct; wings and legs pitchy-black. 
Long. cum tegm. 53-6 millim.; lat. ad hum. 2 millim. 
Hab. Panama, Bugaba and David (Champion). 
Several female specimens. This species, at first sight, looks as if it belonged toa 
BIOL. CENTR.-AMER., Rhynch. Homop., November 1904. . *15 
