408 TROGOSITIDZ. 
This species is difficult to place, being to a-certain extent intermediate between 
very different species; by the form of the prosternum, which is without any trace of 
margin behind, it is nearest to 7. smithi, though very different therefrom in other 
respects. 
Group F.—Apex of prosternum conically protuberant, polished. (Species 26-31.) 
26. Temnochila polita. 
Trogosita polita, Chevr. Col. Mex. Cent. i. no. 66°. 
finea, nitida, antennis pedibusque nigris ; capite fortiter punctato; prothorace medio longitudinaliter depresso, 
depressione in medio punctata. 
Long. 11-17 millim. 
Mas, area submentali medio fasciculo parvo instructa; abdomine segmentis 1°-4™ ad latera subtiliter punctatis. 
Fem., area submentali abdomineque levigatis. 
Hab. Mexico1, Toxpam, Cordova (Sallé), Bobo (Hége); British Honpuras, R. Sarstoon 
(Blancaneauz); GuateMaLa, Las Mercedes, Cerro Zunil, Zapote, Capetillo, Panima, 
Sabo, San Juan in Vera Paz (Champion) ; Panama, Volcan de Chiriqui (Champion). 
This species differs from all its allies in having the thoracic depression furnished 
along the middle with coarse punctures. Mr. Champion found nearly three dozen 
examples in Guatemala, and a single specimen in the State of Panama; this latter 
does not differ in any respect from Mexican exponents. The species, however, varies a 
good deal in minor characters, and also in the development of the fascicle on the 
submentum of the male. 
27. Temnochila querula, sp. n. 
Enea, nitida, antennis pedibusque nigris; capite subopaco, obsolete punctato, oculis subprominulis ; prothorace 
medio longitudinaliter depresso, depressione levigata, margine basali subtili. 
Long. 13 millim. 
Hab. Guatemaa, Purula, Capetillo (Champion). 
I have before me seven examples that I refer to this species; they are well distin- 
guished from 7. polita by the less punctate head, with more prominent eyes, the fine 
basal margin of the thorax, and the impunctate longitudinal impression on this latter 
part. Iam not equally sure, however, that all the seven individuals belong to the 
same species, as I fail to distinguish the sexes satisfactorily : in none of the individuals 
is there any fascicle on the middle of the submentum, though some of them have a 
few fine punctures on this part, while in the others it is quite smooth; also in some of 
the specimens there is a coarse punctuation extending across the penultimate ventral 
segments, which in other examples is less distinct. I am inclined to think that they will 
prove to belong to one species, in which the usual sexual distinctions are nearly absent 
and the punctuation of the ventral segments is at the same time more variable than 
