228 STAPHYLINIDZA. 
evidently narrower than elytra, gently narrowed behind, evidently transverse, very 
feebly punctulate, and only indistinctly impressed in front of the scutellum. Elytra 
rather short and broad, but longer than the thorax, extremely finely punctate. Hind 
body densely and excessively finely punctate. 
Of this species Mr. Champion has sent two specimens, immature and in very fragile 
condition. The hind margin of the elytra is narrowly yellow, possibly from immaturity. 
The species is quite distinct from the others here assigned to the genus, the transverse 
depressions on the basal abdominal plates being indefinite. The middle coxe are 
rather broadly separated, as in G. nigricans. 
3. Gnypeta mexicana. 
Nigra, nitida, tenuiter pubescens, antennarum basi pedibusque testaceis; prothorace subquadrato, postice 
leviter angustato, basi bifoveolata. 
Long. 33 millim. 
Hab. Mexico, Guanajuato (Dugés, coll. Sallé). 
This insect is very similar to G. nigricans, but is an undoubtedly distinct species, the 
middle coxe being more approximate and the mesosternal intercoxal process being 
narrower, so as to terminate in a point instead of being truncate. The antenne and 
legs are rather more slender and elongate. The head is finely and sparingly punctate ; 
the fourth joint of the antenne rather elongate. ‘The thorax much narrower than the 
elytra, but hardly so long as broad, sparingly punctate. The elytra are sparingly and 
very finely punctate, the hind body rather more closely. 
The unique individual of this species was preserved in Sallé’s collection as Tachyusa 
mexicana, i. Dugeés. 
RECHOTA. 
Ex affinitate generis Gnypete; sed caput posterius subangustatum, collo sat lato; coxe intermedie satis 
distantes, laminaque mesosternalis apice lato, truncato; tarsi posteriores tenues, articulo basali elongato, 
sequentibus duobus simul sumtis fere eequali. 
This genus is established for an insect having the sculpture and coloration of the 
species of the genus Gnypeta, and with the same number of joints in the various tarsi 
(4, 5, 5); but it had better be separated on account of the peculiarities I have 
mentioned. ‘The three basal plates on the dorsal surface of the hind body are trans- 
versely impressed as in Gnypeta. Not only is the apex of the mesosternum truncate, 
but also the anterior point of the metasternum is in the same condition, there being 
thus left between the two coxal cavities a very short parallel-sided isthmus at about the 
middle of the length of the cavities. The prothoracic side pieces are of moderate size, 
as in Gnypeta. 
In addition to the species for which the genus is founded, another closely allied one 
was found by Squires at Rio de Janeiro. 
