TROPIDOSCYTA. . 13 
to Enchenopa; the prothorax, however, is not foliaceous, and is, as a rule, rather 
broad if viewed from above; the front part of the prothorax is either rounded or 
produced into a very obtuse point, and is never furnished with a projecting horn, and 
the back is strongly carinate. About a dozen species have hitherto been described from 
North, Central, and South America. It appears to be the best course to divide the 
genus further, and I have therefore assigned generic value to Tropidoscyta gibbera, 
Stal, and to 7. pallidipennis and T. cornutula, Stal. In subdividing Stal’s genera a 
difficulty is caused through his often omitting to state what his type is; this, and the 
omission of the references in his tables, and the fact that he appears often to have sent 
out species under MS. names, and not afterwards described them, tends much to lessen 
the value of some of his work, and to cause great confusion and unavoidable mistakes. 
There are certain species in Signoret’s collection which I fail entirely to trace, although 
it is of course possible that descriptions may have been published somewhere, and the 
same is the case with two or three genera; as undoubtedly some are MS. names, it is 
probable that the others are also. 
Membracis torva, Germ., may be taken as the typical species of Tropidoscyta, and 
M. pecila, Germ., belongs to the same genus; the tegmina have three discoidal cells. 
1. Tropidoscyta salla#i, sp.n. (Tab. I. figg. 19, 194.) 
Fusco-ferruginea vel fusca, flavescenti-pubescens ; pronoto fortius punctato, antice lato, postice angustato, apice 
mucronato, cariné centrali et und vel duabus aliis utrinque multo elevatis, et ad latera supra oculos carinis 
quibusdam minoribus instructo; metopidio a latere viso fere recto; tegminibus fuscis parte apicali 
hyalina, venis conspicuis; pedibus fuscis. 
Short, broad in front, much narrowed behind, fusco-ferruginous or ferruginous, with the apical portion of the 
tegmina abruptly hyaline and the apex mucronate. The central carina and one or two on each side are 
strongly marked, and over each eye there are several small carine; the metopidium, if viewed from the 
side, is almost straight, but projects a little further forward at its highest point in some specimens than in 
others ; the surface of the pronotum is clothed with rather spare yellowish pubescence, and is moderately 
strongly punctured ; the legs are fuscous. 
Long. 5 millim.; lat. max. 3 millim. 
Hab. Mexico, Orizaba (Bilimek, in Mus. Vind. Ces.); GuaraMaLa, San Gerénimo 
(Champion); Panama, Bugaba, Caldera, Volcan de Chiriqui, and San Feliz (Champion). 
This insect is identical with a specimen in the Vienna Museum collection named 
Bolbonota sallwi, of which I can find no published description. It appears to be 
somewhat variable in size and in the sculpture cf the prothorax, the front part of 
which is more produced in some specimens than in others. An example from San 
Feliz is figured. 
Since writing the above I have examined a specimen of Membracis pecila, Germ., 
which is placed in the Vienna Museum collection under Bolbonota. It is closely allied 
to this genus, but differs in its much slighter pubescence and the almost total absence 
of carine above the dorsal ridge of the shoulders. 
