210 LONGICORNIA. 
8, Erana fulveola. 
Fulva, aureo tenuiter pubescens, sparsim setosa, corpore subtus, elytrorum epipleuris et apice antennisque 
(@ articulo 4°, ¢ articulis 4° et 5° exceptis) nigris; pedibus fulvis, quatuor posteriorum tibiis et femo- 
ribus nigris ; pectore medio episternisque fulvis; elytris apice utrinque breviter sinuato-truncatis. 
Long. 4 lin. ¢ Q. 
Hab. Guaremata, San Juan (Champion). 
ESSOSTRUTHA. 
Essostrutha, Thomson, Physis, ii. p. 198 ; Lacordaire, Gen. Col. ix. p. 895. 
Like Erana this genus appears to be confined to Mexico and the countries imme- 
diately adjoining it on the south. 
1. Essostrutha leta. 
Saperda leta, Newman, Entom. p. 13°. 
Essostrutha leta, Thomson, Physis, ii. p. 199; Lacordaire, Gen. Col. ix. p. 895, nota. 
Hab. Mexico}, Playa Vicente, Tuxtla, Panistlahuca (Sal/é). 
After a careful examination of the large series of Essostruthe in the Sallé and other col- 
lections from Mexico, and the numerous specimens sent by Mr. Champion from Guate- 
mala, I am disposed to disagree with Thomson and Lacordaire that all the varieties they 
mention belong to one species. If they are one species, it is one of those cases in which 
the varieties are different and constant in different localities. Newman's description 
applies to one of the rarest of the varieties, in which the head and thorax are “rufa” 
and the elytra “cana,” with black lateral border and the thighs red. Specimens in the 
Sallé collection agree pretty closely with this description ; and I find them associated 
with colour-varieties quite different from what I consider to be allied species. In 
E. leta the elytra are unicolorous, either grey, greyish black (sometimes with paler 
suture), or deep black. The colouring of the vertical epipleuree is peculiar and distinc- 
tive of the species,—the basal portion having, in all the varieties, a wedge-shaped vitta 
red or reddish ashy, the rest of the epipleuree being of the same colour as the dorsal 
surface—except in the grey specimen, where the angular upper edge has a long blackish 
streak, answering to Newman’s “ margine laterali nigra.” The abdomen beneath and 
the episterna are always orange-red or tawny, the centre of the breast and abdomen 
grey ; and the round black spot, distinctive of E. fimbriolata, on the flank of the pro- | 
thorax, near the socket of the haunch, is almost always absent. There appears to be 
in E. leta no sexual distinction in colours as in E. fjimbriolata. 
2. Essostrutha fimbriolata. 
Amphionycha albina, Pascoe, Trans. Ent. Soc. ser. 2, iv. p. 256? 
E, leie valde affinis, differt ¢ 2 coloribus disparibus: ¢ supra cinereo-flavus vel fulvus, elytris unicoloribus ; 
