TENEBRIONID/E 129 



Third elytral carina apparently attaining the base or very nearly 6 



5 Form oblong-elongate, parallel, almost flat above, black, subopaque, 

 densely clothed with pale yellowish-brown squamules, hair-like and 

 less appressed on the anterior parts and very fine and sparser on 

 the under surface; head very broadly and feebly impressed and with 

 a pit at the middle of the vertex, closely, not deeply or very coarsely 

 punctate; antennae moderate in length, rather stout; prothorax 

 almost three-fourths wider than long, about as wide as the 

 elytra, the apex very much narrower than the base, deeply 

 sinuate, the angles broadly rounded; sides slightly diverging 

 from apex to base and feebly, subevenly arcuate, rounding in 

 at base, the angles produced posteriorly over the humeri but very 

 obtuse and rounded, lobiform; base broadly, rather strongly sinuate 

 laterally, truncate and with slightly more concentrated hairs medi- 

 ally; surface nearly flat, broadly, feebly concave laterally, not 

 coarsely, very densely and confluently punctate throughout, without 

 more than a partial and feeble trace of a smooth median line, with 

 one or two small smooth spots at each side, the lateral edges very- 

 even but thick and blunt; scutellum large, transverse, triangular, 

 somewhat concave, closely and strongly punctate, with the median 

 line narrowly cariniform; elytra three-fifths longer than wide, at 

 base scarcely perceptibly wider than the thoracic base, the sides 

 nearly straight and feebly converging from the base for fully two- 

 thirds, there more rapidly rounding, the apex gradually pointed and 

 feebly declivous; surface nearly flat, the inner ridge and suture very 

 feeble and broadly obtuse, the others also slight in elevation and 

 obtusely blunt but distinct, the third basally abbreviated as in the 

 preceding, the marginal ridge strong but not much more reflexed 

 basally, all the ridges opaque and but little less closely squamulose; 

 intervals very densely squamose almost throughout but with a line 

 of sparser, more erect and more hair-like and setiform squamules 

 along the middle of each, the sculpture fine and very dense; abdomen 

 smooth, very minutely, feebly and rather sparsely punctulate, more 

 closely so posteriorly; legs slender, with fine and pale close-set hairs. 

 Length (cf) 16.0 mm.; width 7.5 mm. Mexico (La Borrega, Du- 



rango) *planatula n. sp. 



Form stouter and much more convex, parallel, deep black, generally 

 with a loose earthy incrustation, the setae larger but darker in 

 color, becoming pale only along each side of the deep intercostal 

 elytral depressions; head impressed, densely punctate and scabrous, 

 the stiff setae evident, suberect; prothorax two-thirds wider than 

 long, fully as wide as the elytra, parallel, with very evenly rounded 

 sides from the tips of the feebly produced and broadly blunt apical, 

 to the tips of the moderately prolonged and bluntly acute posterior, 

 angles, the base deeply sinuate at each side, much wider than the 

 apex; surface broadly, feebly convex, coarsely, very densely and 

 confluently punctate, with a narrow partial median line and about 

 two small spots at each side embossed and smooth, gradually rather 

 narrowly explanate but not very differently sculptured along the 



T. L. Casey, Mem, Col. Ill, Feb. 1912. 



