Mr. H, W, Bates on 
Genus Esmeralda. 
J. Thomson/ Classif. des Ceramb. p. 303 j Lacord. 
Genera, viii. p. 178. 
Distinguished from Fyrodes by the great width -and 
length of the scutellum, which, in the male, is nearly 
vhalf the length of the elytra ; and by the metasternum 
being greatly advanced between the middle cox^, and 
nearly hiding the grooved mesosternum, which lies 
obliquely on its anterior face ; the prosternum is also of 
great width, and its point does not interlock with the 
mesosternum. The antennae in the ^ are very robust, 
compressed, and subserrate ; the tibiae also are com- 
pressed into thin blades in both sexes, and the tarsi are 
excessively short. 
The only species of this charming group hitherto de- 
scribed is E, suavis, Thoms. But I have no doubt what- 
ever of this being the d' of Pyrodes columhinus, of Guerin 
(said by White, erroneously as I think,* to be the 
Cerambyx auratus of Linnaeus) . I captured the male and 
female of the following species together, but not in 
copula, on the trunk of a slender tree, and as the differ- 
ences between them are not at all greater than in many 
species of Pyrodes, the conclusion that they are sexes of 
one and the same species is not to be resisted. 
1. Esmeralda Icetifica, n. sp. 
(d . Oblonga, depressa, viridi-aenea, nitidissima, capite 
antice et infra thoraceque toto testaceo-rufis aureo- 
tinctis, femoribus 4 anticis et processu metasternali 
ruffs, elytris violaceis, subtilissime rugoso-puncta- 
tis, bicostatis, triente basali excepta sparsim punc- 
tatis . 
Long. 6 lin. 
$ . Late oblonga, subdepressa, laete cyanea, scutello 
et corpore subtus violaceis. 
Long. 94 lin. 
Differs from E, columbina, Guer. [S, suavis, Thoms.) 
in both sexes, by the basal third of the elytra being 
glossy, and marked with very few punctures ; the scutel- 
lum has a few very ffne punctures on each side. The 
* The phrase of Linnaeus “ elytra rubro-viridi-aurata ” is not at all ap- 
plicable to any specimen of E. columlina which I have seen. 
