154 STAPHYLINIDA. 
MASEOCHARA. 
Palpi ¢ omnes articulo minutissimo supplementali muniti. Prothoracis latera parum inflexa, haud occulta. 
Coxe intermedie sat late distantes; acetabula integra; mesosterni processus cum metasterni apice arcte 
conjunctus. 
This genus is proposed for certain insects having greatly the appearance and nearly 
the characters of Polystoma, Rey, but differing by the structure of the middle coxal 
cavities, which are quite complete; whereas in Polystoma the mesosternal process does 
not reach the metasternal process, in MJuaseochara it overlaps it, and conceals its 
extremity; the mesosternal process, too, is broad, and not acuminate as in Polystoma ; 
it has no carina. The characters are taken from Jf. opacella and M. semivelutina: 
two other of the species (IZ. depressa and M. duplicata) are aberrant, and have much 
the appearance of large Homalotw, and will perhaps have to be separated from 
Maseochara as two distinct genera; they are very similar to, and apparently really 
allied to certain species inhabiting New Guinea (Homalota lacrymosa and H. basalis, 
Fauy.), described by an oversight as belonging to the genus Homalota. 
1. Maseochara semivelutina. 
Aleochara semivelutina, Solsky, Hor. Soc. Ent. Ross. v. p. 120’. 
Hab. Mexico!, Puebla (Salt) Guanajuato (Dugés, coll. Sallé), Tehuacan, Mirador 
(Hoge). 
In the male of this species the seventh dorsal plate of the hind body terminates in 
six elongate teeth ; these teeth are obtuse at the apex, and slightly curved inwards ; 
the outer tooth on each side is shorter than the others, and less obtuse at the apex. 
The insect is apparently rare, only one individual having been brought from each of 
the localities recorded. 
2. Maseochara opacella. (Tab. V. fig. 2.) 
suena, coriaceo-opaca, abdomine subnitido, nigricans, pedibus nigro-piceis, tarsis rufescentibus ; capite, 
thorace elytrisque obsolete punctatis; thorace haud transverso, angulis posterioribus obtusis. 
Long. 8-9 millim. 
Hab. Mexico, Tehuacan, Mirador, Misantla (Hoge). 
Antenne black or piceous black, rather elongate and slender, the penultimate 
joint not, or only slightly, transverse. Palpi piceous, with the slender terminal joint 
yellowish. Head narrow and elongate, very obsoletely and sparingly punctured, very 
dull, the surface being densely and finely granulate or coriaceous. Thorax nearly as 
long as broad, rounded at the sides, and a little narrowed behind; the hind angles very 
obtuse, but distinct, the surface-sculpture like that of the head. Llytra scarcely so 
long as the thorax, their punctuation not quite so obsolete as that of the thorax. Hind 
body somewhat shining, irregularly punctate, the base of each segment quite without 
punctuation; segments 2 to 4 rather finely punctate behind, 5 and 6 more coarsely and 
irregularly. 
