230 Mr. J. O. Westwood’s Descriptions 
Scatonomvs, Hrichson. (Wiegm. Archiv.) 
This genus, as described by Erichson, comprises several species 
of an oblong form, some of which are especially distinguished by 
the very broad emargination of the clypeus, within which are occa- 
sionally two acute teeth, and the angles of the emargination are 
furnished with a thick pencil of fulvous hairs. 
In Scat. fasciculatus, Er. the anterior tibize are broad and trian- 
gular, with three teeth close to the extremity on the outside; the 
mentum has a small prominence in the middle of its frontal emar- 
gination; the labial palpi are very short, with the joints subglobose, 
and gradually diminishing in size. 
Pl. XVI. fig. 7. Scatonomus fasciculatus; 7a, maxilla; 7b, instrumenta 
labialia; 7c, labial palpus ; 7d, posterior tarsus, 
[The two following insects were referred by me to the genus 
Scatonomus of Erichson (Wiegmann’s Archiv. f. Naturg. 1. p. 256), 
when this paper was read before the Entomological Society, their 
general characters and habits appearing to me to be sufficiently 
congeneric with those of Scat. fasciculatus, which Erichson places 
in the genus without any expression of doubt, although it seems to 
recede as much from the typical species §. viridis (judging from 
the figure given by Dr. Erichson of that insect) as the two follow- 
ing species do from S. fasciculatus. As Dr. Erichson, however, 
in his Jahrbericht for 1842, (translated by the Ray Club,) has 
stated that the two following insects do not enter into his genus, I 
now restore to them the generic name of Onthocharis, proposed 
without characters in Dejean’s Catalogue. | 
Onthocharis myrmidon, Lacordaire, MS. (PI. XVI. fig. 8.) 
Subcylindricus, niger; capite et pronoto viridibus, nitidis; clypeo 
profunde emarginato, in sinu acute bidentato, elytris leviter 
striatis, prothoracis angulis posticis prominentibus. 
Long. corp. lin. 2. 
Habitat Cayenne. 
In Mus. D. Melly. 
Caput viride, antice piceum, tenuissime punctatum, clypeo late 
et profunde emarginato, dentibus duobus acutis in sinu antico. 
Antenne luteo-rufescentes. Mentum ovale, antice valde emar- 
ginatum. Palpi labiales articulo basali obconico, 2do et 3tio 
fere cequalibus, preecedenti brevioribus, Prothorax elytris 
fere latior, lateribus rotundatis, angulis posticis postice parum 
productis, viridis, tenuissime punctatus. Elytra chalybeo- 
