160 STAPHYLINIDA. 
Antenne rather slender, third joint shorter than the second, fifth about as long as 
broad, tenth slightly transverse ; terminal joint rather elongate, as long as the two pre- 
ceding together. Head about half as broad as the elytra. Thorax transverse, convex, 
narrowed in front, hind angles very obtuse; the colour yellow, but the anterior portion 
usually more or less vaguely and broadly infuscate; very finely punctate. Llytra 
longer than the thorax, punctured like it, yellow, largely infuscate at the hind angle 
externally, hind margin slightly sinuate near the outer angle. Hind body pointed, very 
densely and finely punctate, the three or four apical segments darker in colour than 
the basal ones. | 
This insect is similar to the European 0. alternans, but is smaller, and the meso- 
sternal process is short, the middle acetabula being very incomplete. The small series 
of seven individuals are unfortunately very badly preserved. 
3. Oxypoda championi. 
Rufo-testacea, subtilissime pubescens, subtilius punctata; antennis breviusculis, extrorsum crassioribus, 
articulis 6°-10™ transversis ; prothorace convexo, parce punctato, abdomine equaliter crebre punctato. 
Long. 4 millim. 
flab. Guatemaua, Capetillo (Champion). 
Antenne yellow, short, distinctly thickened externally, third joint shorter than the 
second; from the fourth to the tenth each is a little broader than its predecessor ; the 
fourth and the fifth each about as long as broad, the others decidedly transverse ; ter- 
minal joint stout, scarcely,as long as the two preceding together. Head small, scarcely 
half as broad as the elytra. ‘Thorax convex, evidently broader than long, but not 
strongly convex; base, sides, and hind angles rounded, the surface sparingly punctate. 
Elytra scarcely longer than the thorax, rather sparingly punctate. Hind body attenuate 
behind, rather closely but not densely punctate. 
This insect has the ordinary appearance of our European Oxypode@; it is described 
from a single individual ; the fifth and sixth dorsal plates of the hind body have each 
a fuscous cloud in the middle, which may be a result of decomposition. 
4. Oxypoda plebeia. 
Gracilis, rufo-testacea, opaca, dense subtilissime punctulata et pubescens, elytris in medio subfuscis, abdomine 
segmento quinto sextique basi fuscis; antennis parum elongatis, articulis 5°-10™ transversis; prothorace 
convexo, transverso ; abdomine densissime subtilissimeque punctulato. 
Long. 27 millim. 
Hab. Guatemata, Capetillo (Champion). 
Terminal joint of antenne elongate, rather longer than the two preceding together. 
Thorax nearly twice as broad as long, convex, narrowed in front, closely punctate. 
Elytra rather longer than the thorax, densely punctate, each very vaguely darker about 
