420 TROGOSITIDZ. 
9. Tenebroides circumcinctus. 
Tenebroides circumcinctus, Léveillé, Ann. Soc. Ent. Fr. 1888, p. 419°. 
Depressus, brevis, nitidus, rufus, capite, prothorace elytrisque ad suturam plus minusve late nigricantibus ; 
capite efoveolato ; elytris argute striatis, interstitiis latis, biseriatim punctatis. 
Long. 6—7 millim. 
Var. Rufo-ferrugineus. 
Hab. Mexico, Cordova (Saillé), Jalapa (Hoge), Yucatan (Sallé1), Temax in North 
Yucatan (Gaumer); GuatEMALa, Yzabal (Sallé), Tamahu, San Gerdénimo (Champion) ; 
Nicaraeua, Chontales (Belt). 
Antenne with rather elongate narrow club. Head flat, somewhat shining, mode- 
rately closely and coarsely punctured. Thorax but little rounded at the sides, a little 
narrowed but not sinuate behind, the lateral margin thick, the hind angles obtuse ; 
shining, coarsely punctate. Elytra with regular strie—not series of punctures,—the 
interstices broad, quite flat, biseriately punctate. Ventral segments rather finely punc- 
tate, the punctuation in the male denser and finer than in the female. 
We have received ten examples of this species. I see very little to distinguish it 
from T. chevrolati except colour, and this is very variable. Thus I suspect that, if they 
are really distinct, our examples of 7. circumcinctus must represent more than one 
species; it is perhaps more probable that the contrary is the case, and that 7. chevro- 
dati and T. circumcinctus are only colour-variations of one species. 
10. Tenebroides facilis, sp. n. 
Depressus, nigerrimus, opacus, antennis tarsisque piceis ; elytris obsolete striatis et punctatis. 
Long. 10 millim. 
Hab. Mexico, Jalapa, Amecameca (Hége). 
A very distinct species not likely to be confounded with any of the preceding, the 
black colour and the more or less effaced sculpture of the elytra being characteristic, 
although the latter point is subject to considerable variation. ‘The antenne are piceous 
in colour, with rather long, unusually slender club. ‘The thorax is very strongly trans- 
verse, a good deal narrowed and slightly sinuate behind, the reflexed margin thick, the 
hind angles nearly rectangular, the punctuation fine. The elytra are very flat and dull ; 
the usual striation and interstitial punctuation are present, but are more or less effaced, 
so that in some examples they can scarcely be distinguished; the seventh stria is, 
however, always distinct, though those external to it are completely effaced. The male 
has no tufts on the margin of the submental area, but they are replaced by a slight 
tubercular elevation on each angle of the margin. Six specimens. 
This species is probably allied to 7. opaca, Reitter. The two specimens from 
Amecameca belong to a variety of large size and more elongate form. 
I have placed with some doubt as a variety of this species four specimens, found at 
