PICUMNA.—COLPOPTERA., 129 
Femina segmento ultimo ventrali late emarginato et ad medium leviter producto; processu anali sat lato, ad 
apicem sensim angustato, obtuso. 
Rather short, testaceous or fuscous, with the veins of the tegmina coarse and black; head broad, vertex scarcely 
transverse, forehead longer than broad, gently rounded at the sides; pronotum produced beyond the base 
of the eyes ; scutellum distinctly tricarinate; tegmina comparatively short ; legs testaceous, partly fuscous, 
posterior tibiew with four strong spines. 
Female with the last ventral segment broadly emarginate and slightly produced in the middle; anal process 
rather long and broad, gently narrowed to the apex, obtuse. 
Long. cum tegm. 6 millim.; lat. ad hum. 33 millim. 
Hab. Mexico, Sierra Madre Mountains (coll. Baill). 
, COLPOPTERA. 
Colpoptera, Burmeister, Handb. der Ent. u. 1, p. 155 (1885). 
The members of this genus are distinguished by the strong constriction and narrowing 
of the tegmina before the apex. They are rather long and slender insects, with the 
tegmina declivous and much adpressed to the sides when at rest; the posterior tibie 
are unispinose. Colpoptera has been regarded as intermediate between the Isside 
and the Ricaniide, which are, in some points, closely allied families: the enlarged 
scutellum and the transverse veins on the costal margin of the tegmina would seem 
to refer them to the latter. ‘These veins are more or less obscure in the two species 
described by Burmeister, which seem to be identical; but there is in our collection a 
single imperfect specimen from Atoyac which has them very strongly marked, though 
I have not ventured to describe it. This character, however, is very apparent in 
Hyphancylus falcatus, which undoubtedly belongs to the Isside, and the affinities of 
Colpoptera seem to be rather towards the latter family. At first sight, the genus 
appears to be related to Cyarda, Walker, but the resemblance is probably superficial ; 
his types are in very bad condition. 
1. Colpoptera sinuata. (Tab. XII. figg. 32, 324.) 
Colpoptera sinuata, Burm. Handb. der Ent. ii. 1, p. 155°. 
Colpoptera marginalis, Burm. loc. cit. p. 156 ’. 
Hab. Mexico! ? (Mus. Vind. Ces.), Amula and Acapulco in Guerrero, Vera Cruz, 
Atoyac, Teapa (H. H. Smith); Guatemana, Cahabon, Senahu, San Joaquin, and San 
Gerénimo in Vera Paz, Guatemala city (Champion); Panama, Bugaba and Volcan de 
Chiriqui (Champion). 
There is a very large series of this insect in our collection, consisting of upwards of 
one hundred specimens. If the material in the Vienna Museum has been correctly 
determined by Signoret, C. sinuata is only a lighter and smaller form of C. marginalis. 
I have retained the name C. sinuata, as it is placed first in Burmeister’s work and 
also is much more expressive of the peculiarly sinuate appearance of the tegmina. A 
specimen from Teapa is figured. 
