Coleopterological Notices, IV. 421 



which is the largest and one of the most isolated of the small forms 

 peculiar to the desert regions of Arizona. 



12 T. simplex n. sp. — Oblong-oval, rather convex, piceous, the elytra 

 more or less rufescent ; beak rufous except near the base ; vestiture moderately 

 dense, on the head and basal parts of the beak consisting of oval dense closely 

 recumbent and very small scales, on the pronotum of rather sparse slender 

 cinereous or more or less fulvous squamules, generally with sparsely scattered 

 oval scales toward the sides, on the elytra of slender cinereous or cinereous 

 and fulvous squamules, posteriorly recurved and subrecumbent in a single 

 series on each interval, with scattered rounded scales toward the sides, the 

 squamules of the strial punctures coarse and distinct, the upper surface other- 

 wise glabrous ; under surface densely clothed with small broadly oval whitish 

 scales. Head moderate in convexity, the transverse line at the posterior limit 

 of the eyes distinct, the eyes small transversely fusiform ; beak moderately 

 thick, feebly tapering, tumid above near the base, glabrous and shining be- 

 yond the antennae, feebly arcuate toward base, nearly as long as the head and 

 prothorax, with the antennae inserted at apical two-fifths in the male, slightly 

 longer and thinner in the female, with the antennae inserted at the middle ; 

 antennae slender, the basal joint of the funicle long, moderately thick, feebly 

 obconical, fully as long as the next three, second a little longer than the third, 

 the latter slightly elongate, outer joints gradually thicker. Prothorax one- 

 fourth wider than long, the sides nearly straight and parallel in basal two- 

 thirds, then rounded and rather strongly constricted to the apex, the latter 

 transverse and three-fifths as wide as the base ; punctures coarse, deep, not 

 quite contiguous ; base lobed in the middle. Elytra one-third longer than 

 wide, fully one-third wider than the prothorax, obtusely rounded behind ; 

 striae coarse, punctured. Legs slender, the posterior femora not toothed. 

 Length 1.4-1.7 mm. ; width 0.7-0.9 mm. 



Texas (El Paso); Arizona (Benson and Tucson). 



Of this distinct species I have a large series, the principal varia- 

 tion being in the color of the squamules of the pronotum and median 

 series of the elytral intervals. 



13 T. sibinioides n. sp. — Robust, oblong-oval, convex, piceous, the legs, 

 antennae and beak rufous ; vestiture of the upper surlace nearly uniform, 

 consisting of long slender ochreous-yellow strigose squamules, without trace 

 of intermingled scales, rather dense, those of the strial punctures similar to 

 the others and equally wide, those along the middle of the intervals semi-erect ; 

 under surface more densely clothed with broader whitish scales. Head densely 

 squamulose ; transverse line not distinct ; beak thick but very strongly taper- 

 ing from base to apex, evenly, rather strongly arcuate, very slender and nude 

 beyond the antennae, elsewhere strongly punctured, subcarinulate and densely 

 squamulose, in the male a little longer than the prothorax, with the antennae 

 inserted at apical two-fifths, in the female but slightly longer, but with the 

 glabrous apical portion much longer and almost evenly cylindrical, the 



