no MEMOIRS ON THE COLEOPTERA. 



very coarsely but not deeply rugose; prothorax about an eighth 

 ( 9 ) to nearly a fourth (cf) longer than wide, perfectly parallel, 

 with very feebly arcuate sides, the hind angles minutely denticulate, 

 the lateral margin distinct and bearing a line of elongate punctures; 

 surface evenly convex, strongly but not very closely punctate, with 

 a narrow and feebly denned impunctate median line; scutellum very 

 small, narrow, tumid and sunken; elytra equal in width to the pro- 

 thorax and exactly twice as long, parallel and straight at the sides, 

 broadly parabolic at tip, the striae rather coarse, feebly impressed, 

 bearing coarse punctures crenulating the intervals basally, becoming 

 fine distally, the intervals each with a single loose series of very fine 

 punctures; apical slope with confused fine punctures; abdomen very 

 coarsely, closely punctate; sterna of the hind body coarsely and 

 densely punctate, the prosternum more finely and sparsely except 

 laterad; legs short and stout. Length 5.4-6.5 mm.; width 1.18-1.5 



mm. Arizona (Tucson), Tucker punctiventris n. sp. 



Body cylindric and notably slender 5 



5 Upper surface bicolored, the head and pronotum rufous, the elytra 

 black. Highly polished and very slender, the under surface and legs 

 obscure rufous throughout; head of the usual form; eyes slightly 

 convex, wider than long, transversely truncate behind; surface finely 

 and rather sparsely punctate, shining, broadly impressed medially 

 toward apex; antenna? short, piceous, the ba?al joint obscure rufous, 

 the club one-half longer than wide, parallel as usual, the tenth joint 

 less than twice as wide as long; under surface coarsely rugose, the 

 duller part, just behind the buccal opening, short, transversely 

 rugulose; prothorax elongate, a fourth or fifth longer than wide, 

 parallel, the sides very feebly arcuate; basal angles not at all den- 

 ticulate, the margin nearly as in the preceding; punctures rather 

 small but deep, separated by two or three times their diameters; 

 scutellum very small, somewhat rounded, tumid ; elytra very elongate, 

 parallel, equal in width to the prothorax and distinctly more than 

 twice as long, the apex gradually but very obtusely parabolic; striae 

 moderate, fine behind, the inner stronger than the others, especially 

 toward tip; punctures moderately coarse, fine apically, the apical 

 slope with some fine, sparse, diffused punctures; intervals moderately 

 convex, each with a single series of very minute punctures; abdomen 

 finely, rather sparsely punctate, more coarsely and closely laterally 

 on the first two segments. Length 5.05.25 mm.; width i.o-i.i 

 mm. California (Mokelumne Hill, Calaveras Co.), Blaisdell. 



Three examples bicolor n. sp. 



Upper and lower surfaces of the body each uniform in color throughout . . 6 

 6 Form elongate, cylindric, black or piceo-castaneous, shining; under 

 surface and the antennae and legs dark ferruginous; head remotely 

 punctate, the anterior margin medially depressed; prothorax elon- 

 gate-quadrate, somewhat densely and strongly punctate; elytra 

 equally punctato-striate, the striae slightly finer apically; intervals 

 narrow, equal, uniseriately punctulate; tibiae nearly straight; sutural 

 stria only slightly more strongly impressed than the others. Length 

 6 mm. California sequalis Rttr. 



