144 MEMOIRS ON THE COLEOPTERA 



finely aciculate but rather obtusely pointed at the very free tip, 

 which is moderately distant from the broadly angulate metasternum, 

 the longitudinal separating ridge not much depressed and broadly, 

 feebly convex; the first four joints of the hind tarsi are equal, the 

 fifth as long as the preceding three combined. 



Dimetrota (Dimetrotina) vaniuscula n. sp. Oblong, feebly convex, 

 strongly shining, the micro-reticulation feeble, large- and polygonal on 

 the abdomen; punctures small but asperate, only moderately close, 

 denser on the elytra, rather numerous but very fine on the abdomen; 

 vestiture moderately short, palish; color piceous-black, the head and 

 abdomen black, the elytra dark piceous, pallescent at the humeri, the legs 

 pale, short; head slightly transverse, fully three-fifths as wide as the 

 prothorax, convex, the eyes rather large and prominent, at three-fourths 

 their length from the base, the tempora less prominent, gradually arcuate 

 and converging to the base; antennae moderately short, black, pale bas- 

 ally, gradually and distinctly incrassate from the fifth joint, the third 

 joint but very little shorter than the second, both much shorter than the 

 first, which is suboval, fourth slightly wider than long, scarcely at all 

 wider than the tip of the third, fifth abruptly wider and transverse, 

 the tenth two-thirds or more wider than long, the last large, conoidal, 

 longer than the two preceding; prothorax broad and short, three-fifths 

 wider than long, widest slightly behind the middle, the sides rounded, 

 more convergent anteriorly than basally, the surface unimpressed; elytra 

 moderately transverse, with feebly diverging sides, at base equal in width 

 to the prothorax, the suture two-fifths longer, the apices not sinuate 

 externally; abdomen rather small, much narrower than the elytra, very 

 feebly narrowed and with not quite straight sides from base through the 

 fifth tergite, which is scarcely at all longer than the fourth, the sixth in 

 the type with the apex rather deeply but broadly, angularly sinuate, 

 the lateral angles obtuse and slightly blunt, not modified. Length 1.75 

 mm.; width 0.63 mm. Nevada (Esmeralda Co.), Nunenmacher. 



Distinguishable in the present group by the wide prothorax, 

 fully equaling the base of the elytra and widest behind the middle. 

 The sex of the type cannot be stated with certitude but it is probably 

 male. 



Sableta Csy. 



The species described by the writer under the name Silusida 

 nanella and assigned to the Bolitocharini (Tr. St. Louis, XVI, p. 

 271), is a Myrmedoniid and is identical with Sableta (Canastota) 

 beatella (Mem. Col., I, p. 109) ; the name of the species will therefore 

 be Sableta ( Canastota) nanella Csy., with the name beatula as a syn- 

 onym. Silusida marginella is a true Bolitocharid near Venusa. 



