424 TROGOSITIDA. 
Division B.—Basal line of the prothorax not interrupted in the middle (in a very 
few species this line slightly imperfect in the middle). (Species 18-52.) 
Group 3.—Jnsects of large or moderate size, without definite markings. 
(Species 18-41.) 
18. Tenebroides difficilis. 
Tenebroides difficilis, Léveillé, Ann. Soc. Ent. Fr. 1888, p. 421°. 
Hab. British Honpuras, Belize (coll. Léveillé*). 
M. Léveillé has not recognized this species among the series I sent him. It appears 
to be an insect somewhat allied to 7. latus and 7. harpaloides, having the basal line 
of the thorax scarcely interrupted, and therefore intermediate between the two divisions 
of the genus. It was described from a single example. 
The insect, by mistake, is quoted by M. Léveillé as from Yucatan 1. 
19. Tenebroides latus. 
Tenebroides latus, Léveillé, Ann. Soc. Ent. Fr. 1888, p. 423°. 
Hab. Mexico}, Huitzo in Oaxaca (Hoge). 
We have received only one specimen that agrees with the description of 7. Jatus, and 
my determination of it has been confirmed by M. Léveillé. The species bears a great 
resemblance to T. facilis, but is rather shorter and less depressed, and has the basal 
margin of the thorax scarcely interrupted in the middle. 
20. Tenebroides undulatus, sp.n. (Tab. XIII. fig. 15.) 
Valde depressus, niger, nitidus, minus parallelus ; capite prothoraceque crebre subtiliter punctatis ; elytris sub- 
tilius striatis, striis ad latera et ad apicem omnino obsoletis; pedibus piceis; antennis piceo-rufis. 
Long. 10-12 millim. 
Hab. Guatemata, Totonicapam 8500 feet (Champion). 
Head without any fovea, somewhat finely punctured. Thorax much narrowed 
behind and strongly sinuate at the sides; the posterior angles not prominent, a little 
obtuse though very nearly rectangular; the lateral margin fine, especially towards the 
base ; the surface shining, black, rather finely punctured. Elytra not parallel at the 
sides, pitchy-black, but little shining, the strie and interstitial punctuation more or less 
obsolete, and scarcely to be detected at the sides and apex. Ventral segments sparingly 
punctate. Seven specimens. 
This and the following four or five species are extremely closely allied. J. undu- 
latus, however, is less parallel, and has the sculpture of the elytra more obsolete than in 
the rest of the group. I have not observed any sexual distinctions init. Found beneath 
the bark of pines (Champion). 
