158 STAPHYLINIDA, 
extrorsum incrassatis, articulis 5°-10™ fortiter transversis, basi rufo-obscura; abdomine apicem versus 
. attenuato, densissime punctato, segmentorum marginibus posterioribus ferrugineis. 
Long. 33 millim. 
Hab. Mexico, Jalapa (Hoge). 
Antenne shorter than head and thorax, second and third joints rather elongate and 
slender, almost similar to one another; fourth quadrate, much narrower than the fifth, 
which, together with the following ones, is rather strongly tranverse; terminal joint 
stout, rather short. Head short and broad, very much narrower than the thorax, quite 
dull, only very indistinctly punctate, with a distinct fine pale pubescence. Thorax very. 
strongly transverse, twice as long as broad, as broad at the base as the shoulders of the 
elytra, slightly narrowed in front, the greatly deflexed anterior angles very indistinct ; 
the surface quite dull, with a fine but quite distinct granular sculpture. Elytra scarcely 
longer than the thorax, pale-red, densely punctate. Hind body very densely punctate, 
the segments not distinctly transversely impressed at the base, all the segments margined 
with red, the apex dull red. Legs slender ; basal joint of hind tarsus about as long as: 
the two following together. 
Only a single individual, of uncertain sex, has been received; the peculiar sculpture, 
consisting of a granulation rather than an impressed punctuation, should much facilitate 
its recognition. 
POLYLOBUS. 
Polylobus, Solier, Gay, Hist. Chil. iv. p. 8354; Fauv. Bull. Soc. Norm. x. Faune du Chili, p. 43 
(sep. copy). 
This genus comprises ten species peculiar to Chili; and to these M. Fauvel has 
recently added five others from Australia. The insect here ascribed to the genus, on 
the authority of a single ill-preserved exponent, has quite the appearance of its Chilian 
representatives ; but I cannot see with certainty that it has more than four joints to the 
front tarsi; and if this be really the case it will probably prove to be the representative 
of a new genus to be located in the Myrmedoniina near Hoplandria. 
1. Polylobus advena. 
Minus depressus, rufo-testaceus, pectore abdomineque nigricantibus, hujus segmentorum marginibus testaceis ; 
antennis parum elongatis, apicem versus incrassatis ; prothorace rotundato-transverso ; abdomine crebre 
punctato. 
Long. cire. 3? millim. 
Hab. Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 
Antenne rather slender at the base, a good deal thickened at the extremity; third 
joint hardly so long as second ; fourth small, as long as broad; fifth to tenth transverse ; 
terminal joint obtuse, rather short. Head only half as broad as the elytra. Thorax 
strongly transverse, much rounded at the sides and base, so that the hind angles have 
disappeared, distinctly narrower in front than at the base, the surface closely, extremely 
