260 STAPHYLINIDA. 
12. Gyrophena pollens. 
Convexa, nitidula, haud pubescens, nigra, antennarum basi pedibusque testaceis, his femoribus fuscescentibus ; 
antennis articulo quarto brevissimo, 7°-10™ leviter transversis ; prothorace quadripunctato; abdomine 
interdum (presertim in femina) picescente. 
Long. 33 millim. 
Hab. Payama, Volcan de Chiriqui 3000 to 4000 feet (Champion). 
Antenne with the four basal joints yellow, the others black; third joint shorter 
than second ; fourth very short; joints fifth to tenth similar to one another in breadth, 
the first of them about as long as broad, the last of them a little transverse. Thorax 
very polished and shining, convex transversely, with four conspicuous punctures placed 
so as to form a square on the middle. Elytra rather longer than the thorax, in the 
male with numerous rough granules, in the female with a few distant punctures. 
In the male the dorsal plate of the seventh segment terminates on each side in an 
elongate scarcely acuminate spine; the two spines are parallel, except that they are 
slightly incurved at the extremity ; between them the plate is produced so as to form 
an elongate lobe, which is polished and shining, convex transversely, with rounded 
extremity, which does not reach quite so far back as the lateral spines do. In the 
female the corresponding plate terminates in four straight teeth, the two in the middle 
shorter and finer than the lateral ones. 
Mr. Champion has found a large series of this species. It exhibits but little variation 
except in the colour of the hind body, which sometimes, perhaps owing to immaturity, 
is picescent. 
13. Gyrophena humeralis. 
Convexa, nitidula, haud pubescens, nigricans, antennis fulvis, basi pedibusque testaceis; antennis articulo 
quarto parvo, penultimis vix transyersis ; prothorace quadripunctato; abdomine picescente vel rufescente ; 
elytrorum humeris flavescentibus. 
Long. 3 millim. 
Hab. Panama, Volcan de Chiriqui 3000 to 4000 feet, Bugaba (Champion). 
This species is closely allied to G. pollens, but has some constant differences in colour, 
in the structure of the antenna, and in the characters of each of the sexes. It also 
agrees In numerous respects with Erichson’s description of G. splendidula, but in other 
points does not accord therewith. I think indeed there is little doubt, from the loca- 
lities and measurements given by Erichson, that his description was taken from more 
than one species. 
Antenne rather slender ; third joint much more slender than second, almost as long 
as it; fourth joint small, nearly as long as broad; fifth joint not, tenth hardly trans- 
verse. ‘Thorax very shining, convex transversely, with four very large punctures on 
the middle. Elytra rather longer than the thorax, very shining, with distinct pale 
