418 TROGOSITIDZ. 
rounded at the sides and narrowed behind ; hind angles very slightly prominent, obtuse ; 
the surface dull, as if greasy, finely punctured. Elytra short, without distinct striation, 
but with very distinct series of punctures, the interstices not quite flat, their serial 
punctuation very indistinct. yes very coarsely faceted. The submental area and 
margin very finely punctate. Prosternum impunctate. Hight examples. 
An obscure species, without any salient characters. The Mexican examples differ 
slightly in punctuation from the three individuals found in Guatemala. M. Léveille 
assures me that our insect is really referable to 7. breviusculus, though I quite failed 
to detect this from Reitter’s tables. 
4. Tenebroides celatus, sp.n. (Tab. XIII. fig. 13.) 
Piceus, depressus, sat elongatus, nitidus, capite opaco, antennis pedibusque rufis; capite prothoraceque sub- 
tiliter punctatis, hoc fortiter transverso ; elytris seriatim sat fortiter punctatis. 
Long. 10, lat. 34 millim. 
Hab. Mexico, Cordova (Sallé); GuatzMata, Las Mercedes, Mirandilla (Champion) ; 
Nicaracvua, Chontales (Janson). 
This is very closely allied to 7. breviusculus; but is a more elongate insect, with a 
shining thorax, which has the sides behind the middle more parallel and the raised 
margin more coarsely sculptured externally. The eyes are unusually large and coarsely 
faceted, and have a greater extension on the upper surface of the head than they have 
in T. breviusculus. Five specimens. 
5. Tenebroides subplanus. 
Tenebrioides subplana, Reitter, Verh. Ver. Briinn, xiii., Abhandl. p. 70°. 
Hab. Mexico }. 
The only species we have received examples of that would at all nearly answer to 
Reitter’s description is 7. celatus. But T. subplanus is said to be black, to have the 
lateral serial punctuation of the elytra not visible, and the interstices almost subcostate 
—characters which do not at all apply to Z. celatus. 
6. Tenebroides sonorensis, sp.n. (Tab. XIII. fig. 14, 2.) 
Latus, depressus, nitidus, fortiter punctatus, piceus, antennis pedibusque rufis ; prothorace brevi, basin versus 
fortiter angustato, sinuato; elytris striato-punctatis, striis ad apicem obsoletis, interstitiis argute biseri- 
atim punctatis. 
Long. 74 millim. 
Hab. Mexico, Northern Sonora (Morrison). 
Antenne slender, the club long, the prominent lobes of the club small and much 
separated. Head broad, coarsely punctate, shining, almost unimpressed. Eyes small. 
Thorax very short, the anterior angles large, acute, much produced, the lateral margin 
