612 STAPHYLINIDA. 
Head broad, rather sparingly and coarsely punctate. Antenne very slender, elongate, 
clear yellow, immaculate. Thorax longer than broad, much rounded at the front and 
hind angles, but not narrowed behind, very little punctured, very convex. LElytra very 
short and slender, deeply impressed, sparingly punctate. Femora broadly fuscescent 
externally. 
Readily distinguished from P. /etipes by the longer and immaculate antenne, the 
impressed wing-cases, and darker mandibles. /P. velox greatly resembles P. salvini, but 
has a differently shaped thorax, and can be distinguished at a glance by the colour of the 
legs. The few examples I have seen were supposed to be duplicates of P. salvint. 
9. Peederus erythroderus. 
Pederus erythroderus, Er. Gen. et Spec. Staph. p. 663°. 
Hab. Mexico 1, Orizaba (Chevrolat), Cordova (Sallé). 
Of this species I have seen only the type from Chevyrolat’s collection and three 
examples obtained by M. Sallé. Chevrolat’s example was obtained from Sallé. 
10. Peederus filicornis. 
Elongatus, gracilior, nigerrimus; elytris cyaneis; antennis tenuioribus elongatis, testaceis, articulis 4°-10™ 
fuscis, tarsorum apicibus sordide testaceis. 
Long. 12 millim. 
Hab. Mexico, Jalapa (Hoge). 
Antenne unusually slender, elongate. Mandibles black, piceous at the tip. Head 
rather narrow, narrower behind the eyes towards the vertex, quite sparingly punctate. 
Thorax suboblong, considerably longer than broad, but little narrowed behind, with 
but few, subobsolete punctures. Elytra short, not so long as the thorax, very narrow 
at the shoulders, sparingly punctate. Hind body broader than the anterior parts. 
This is a much more slender insect than P. currax, and is readily distinguished from 
that species by the slender antennze with infuscate middle joints, by the narrow head, 
dark palpi, and more oblong thorax. The species is known to me only by a unique 
female. 
11. Pederus thoracicus. 
Pederus thoracicus, Er. Gen. et Spec. Staph. p. 663’. 
Hab. Mexico1, Playa Vicente (Hége). 
This species is very similar to P. erythroderus, but can be distinguished easily by the 
coarsely and deeply punctate wing-cases, which are slightly longer than in P. erythro- 
derus; the scutellum and the greater part of the mesosternum also are black. Only 
a single immature example has come under my notice. 
