302 STAPHYLINIDA. 
posterioribus vix retrorsum spectantibus ; elytris crebre subtiliter punctatis, secundum marginem lateralem 
canaliculatis; abdomine crebrius punctato. 
Long. 32 millim. 
Hab. GuateMaLa, Guatemala city, Capetillo, Cerro Zunil 4000 feet, Balheu and 
Purula in Vera Paz (Champion). 
Antenne scarcely thickened outwardly ; joints 8-10 each about as long as broad. 
Extreme hind margin of elytra piceous; the sides of the elytra quite straight; the 
hind margin rounded at its junction with the sides, and thus forming a rounded, not an 
obtuse, angle. Hind body but little shining, not closely punctate; the two or three 
basal segments each finely reticulate-strigose at the base; the hind margins more or 
less piceous, that of the penultimate segment broadly so. 
Three of the individuals from Cerro Zunil have the elytra rufescent or picescent, but 
this is not sufficient warrant for their separation. 
11. Erchomus dubius. 
Depressus, piceo-castaneus; antennarum basi, palpis pedibusque testaceis ; antennis sat elongatis, fere gracilibus, 
articulis nullis transversis ; thorace parce subtilissime punctulato, basi fere truncato; elytris subtiliter 
punctulatis, vix ad marginem lateralem canaliculatis; abdomine crebre subtiliter punctato. 
Long. 3 millim. 
Hab. Guatema.a, Cahabon in Vera Paz (Champion). 
Compared with LE. segnis, the two individuals of this species are smaller and flatter, 
and have the hind tarsi markedly shorter, so that they are no doubt representative of a 
distinct species, even though the colour and other slight marks alluded to in the diagnosis 
should prove not to be constant characters. The only two specimens found are imma- 
ture, and in a broken and fragile state. 
12. Erchomus sinuatus. (Tab. VII. fig. 6.) 
Depressus, niger, nitidus ; elytris rufescentibus vel picescentibus, antennarum basi, palpis pedibusque testaceis ; 
thorace elytrisque crebre sat subtiliter punctatis, his ad marginem lateralem canaliculatis, angulo externo 
sinuato. 
Long. 5 millim. 
Hab. Nicaragua, Grenada (Sallé), Chontales (Janson) ; Panama, Bugaba, 800 to 1500 
feet (Champion).—Soutn America, Venezuela, Colombia. 
The individuals of this species are larger than those of the allied species, and are 
readily distinguished, inasmuch as the hind margin at the outer angle is slightly sinuate 
instead of being obtuse or rounded as in other species; the mesosternal carina is not 
much elevated, but presents near its anterior part a prominent, free, small angle. The 
second joint of the antenna is a little longer than the third; the tenth hardly so long 
as broad; the terminal joint elongate, dark, its acuminate extremity pale. The base 
of the thorax is but little sinuate on each side, and the hind angles are not prolonged 
