Coleopterological Notices, VI. 513 



tate. Abdomen thinly ciuereo-pubescent. Length 2.8-3.2 mm.; width 0.95- 

 1.35 mm. 



Arizona (Benson), Mr. Dunn. 



A very distinct form, represented before me by numerous speci- 

 mens displaying considerable variation, the central dark area of 

 the pronotum being wholly obliterated in some cases. The male 

 above described differs from the female in its smaller size and 

 narrower form, and the female has the elytra larger and parallel, 

 the antennre relativeh' shorter and the head barely three-fourths 

 as wide as the prothorax ; the fifth ventral of the male is feebh^ 

 sinuato-truncate at tip. Man}- of the examples before me have 

 the entire elytra rufo-ferruginous, except a clouded piceous area 

 at the base, 



57. T. quadricollis Lee. — Proc. Acad. Nat. Sci., Phila., 1859, p. 75 

 (Dasytes); L c, 1866, p. 354 (Pristoscelis). 



Oblong, rather stout and strongl}' convex, polished, the head 

 and prothorax not at all rugose toward the sides, black, without 

 metallic lustre; legs black, the tarsi and antennae slightly pi- 

 ceous; pubescence consisting of numerous long erect and black 

 hairs, confusedly intermingled on the el3'tra with a very few 

 coarse and cinereous dispersed hairs, which are onl}^ slightly 

 more numerous toward the suture, sides and apex. Head nearly 

 two-thirds as wide as the prothorax, convex, finel}'. sparsely 

 punctulate, the frontal impressions rather small and well marked ; 

 epistoma transverse; labrum strongl}- rounded, pale toward tip; 

 antennae distinctly longer than the prothorax, the outer joints 

 transverse, clothed with fine sparse hairs which become shorter, 

 denser and more erect sette within. Prothorax three-fifths wider 

 than long, the sides almost parallel and ver}- feebly arcuate, be- 

 coming slightly sinuate and convergent near the basal angles which 

 are obtuse but distinct and slightly reflexed; apex rectilinearl}' 

 truncate, very feebly and anteriorly oblique near the sides, the 

 apical angles only slightly obtuse and blunt; base arcuate; disk 

 finely, sparsely punctate. Elytra nearly two-thirds longer than 

 wide and one-fourth wider than the prothorax, parallel, dehiscent 

 and broadl}' rounded behind, finely but strongl}', not very densely 

 punctate. Length 3.4 mm.; width 1.35 mm, 



California (southern). The description given above refers to 

 the female, and the species exhibits a close affinity with sutu- 



