ESSODIUS.—EUGNAMPTUS. 29 
1. Essodius unicolor, sp. n. (Tab. I. fig. 24.) 
Fulvus, prothorace leviter inaurato, parce pilosus, crebre punctato ; elytris seriatim subtiliter punctatis, inter- 
stitiis parce subtilissime seriatim punctatis. 
Long. cum rostro 5 millim.. 
Hab. Mexico, Zacualtipan in Hidalgo (Hége). 
Rostrum rather longer than the head and thorax, slender, almost without sculpture, 
the antenne inserted near, but not at, the base, elongate, with slender club, consisting of 
three joints of about equal length, and each quite twice as long as broad ; eyes widely 
separated, rather small but very prominent, the space between them finely punctate. 
Thorax narrow, but not cylindric, a little rounded at the sides, moderately closely and 
deeply punctate. Scutellum very small. Elytra with very regular serial punctuation, 
which becomes quite obsolete at the apex, the serial interstitial punctuation very fine, 
except that at the base there are a few larger punctures interposed between the first 
and second series; the erect pilosity is rather scanty and of the same colour as the 
surface. The legs are slender, the basal joint of the hind foot about as long as the 
second and third joints together. 
We have received seven examples of this species. I do not detect any sexual 
distinctions. 
EUGNAMPTUS. 
Eugnamptus, Schonherr, Gen. Cure. v. p. 339 (1839); Sharp, Trans. Ent. Soc. Lond. 1889, 
p. 69. 
This genus has comprised hitherto some half-dozen North-American species, and 
three or four others from Eastern Asia. It is evidently destined to prove very nume- 
rous in species from tropical America, and it is doubtful whether the Old-World forms 
will be retained in the genus. The species are very difficult to describe and some 
exhibit much variation in colour, this being sometimes in part sexual. ‘The prosternal 
structure is somewhat variable, but the apices of the epimera are always free ; though 
I think I have observed in one species that one minutely overlaps the other, the apices 
in this case not being united but separated by a small space. . A readily observed 
character for the recognition of the genus exists in the extremely peculiar club of the 
antenne, which is always very long and fragile, but varies much in the form and 
proportion of the joints. 
In addition to the series of species here described, I have evidence of the existence 
of eight or ten other species in our region, each of which is represented by a single 
example in too decayed condition for examination. 
