STAPHYLINIDA. 177 
The unique example is probably a male, the terminal ventral plate being rounded ; 
the last dorsal plate truncate, apparently with a minute scarcely visible serration. 
17. Aleochara peltata. 
Aleochara peltata, Er. Gen. et Spec. Staph. p. 172’. 
Hab. Mexico}. 
We have not as yet received any species agreeing with this description +, and | am 
inclined to suppose it may prove to be not a true Aleochara. 
MASEOCHARA (p. 154). 
4 (a). Maseochara hogei. 
Subparallela, opaca, abdomine subnitido, nigro, elytris disco vage rufescente; griseo-pubescens, obsolete 
punctata; prothoracis angulis posterioribus obtusis. 
Long. 6-7 millim. 
Hab. Mexico, near the city, Tula, Cholula in Puebla (Hoge). 
Distinguished from the other species of the genus by the elytra being obscurely 
rufescent, with the sides nearly or quite black. The basal joint of the antenne is piceous, 
and the penultimate joints are slightly transverse. The thorax is transversely quadrate, 
its sides narrowed behind, the hind angles quite distinct though very obtuse, the surface 
very dull, the punctuation very obsolete. Elytra scarcely so long as the thorax, finely 
punctate. Hind body parallel, with fine punctuation. Legs nearly black, the tarsi 
sordid red. The male has six teeth on the hind margin of the last dorsal plate. 
POLYLOBUS (p. 158). 
2. Polylobus flavescens. 
Parum elongatus, posterius acuminatus, flavo-testaceus, abdomine nigricante dense subtiliter punctato. 
Long. 23 millim. 
Hab. Mexico, Zacualtipan in Hidalgo (Hége). 
Antenne short, much thickened externally, the base slender ; joints 7-10 transverse ; 
terminal joint short, obtuse. Head short, only about half as broad as the thorax. Thorax 
strongly transverse, the base rounded, the surface very finely punctulate. lytra rather 
longer than the thorax, closely and very finely punctulate. Hind body narrowed from 
the base to the apex; black, with the margins of the segments more or less yellow, the 
basal segments almost entirely of that colour; very closely and regularly punctate. The 
male has a minute carina along the middle of the terminal and penultimate dorsal 
plates. 
As in the case of P. advena I can only see four joints in the front feet of this insect, 
so that its systematic position is doubtful. 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, October 1887. 5 GG 
