268 MEMOIRS ON THE COLEOPTERA 



each elytron; at the humeri the punctures become fine and feeble; 

 pygidium bluish, strongly and very densely punctate, sometimes finely 

 carinulate apically, the punctures rather abruptly fine and sparse at 

 apex; prosternum compressed, the striae rapidly diverging anteriorly, 

 each ending in a small deep fovea; anterior tibiae with many subequal 

 narrow external spines. Length 2.5-3.0 mm.; width 1.7-2.4 mm. 

 Arizona (Tucson), Tucker. 



A good series of this very fine distinct species was recently sent 

 me; there is none closely allied to it thus far described. The 

 pygidial carinule is probably a sexual character, as it is seldom 

 visible. The following may be a subspecies: 



*Saprinus psyche ssp. tardus nov. Similar to psyche in general char- 

 acters and sculpture throughout, but rather less broadly oval and with 

 the lustre of the upper surface bright bronzy-aeneous throughout, without 

 trace of the blue tint on the punctured areas of the elytra; prothorax with 

 the sculpture exactly similar but it is more abbreviated, the sides less 

 convergent from the base, the apical sinus similarly deep; elytra as in 

 psyche in every respect, except that the dense punctures are rather less 

 coarse. Length 2.4-2.6 mm.; width 1.8-1.9 mm - Mexico (Federal 

 District). 



There can be no doubt that this is a form closely related to 

 psyche, and it may be considered subspecific provisionally. 



*Saprinus bispeculatus n. sp. Broadly rhomboidal, moderately con- 

 vex, black, the legs nearly black, the upper surface with bronzy lustre, 

 slightly bluish on the densely punctate areas; head very densely punc- 

 tate; prothorax rather more than twice as wide as the median length, 

 trapezoidal, the strongly converging sides rounded anteriorly; surface 

 with a large transverse smooth and polished discal area sharply defined, 

 the sides of which are rounded and at about lateral sixth of the width, the 

 remainder, including the base, with extremely dense uniform punctures, 

 which are not very coarse, becoming smaller and sparser at the middle 

 of the apex; elytra nearly as in psyche but with the punctures even 

 denser and not quite so large, the extremely sharply defined oval scutellar 

 mirror very large, extending nearly to apical fourth and, laterally, beyond 

 the median line; oblique striae less distinct, almost obliterated; humeral 

 swelling polished and impunctate; pygidium not coarsely but extremely 

 deeply and densely punctate, rapidly finely and feebly so at apex; 

 sterna and tibiae nearly as in psyche. Length 2.8 mm.; width 2.25 mm. 

 Mexico (Federal District). 



This species, while allied rather closely to psyche, is more obliquely 

 rhomboidal in outline, with the punctures of the elytra finer and 

 even denser, and the polished area of the pronotum not angulate 

 and near the edge at its lateral limits, but laterally rounded and 

 remote from the edge; the scutellar mirror is even larger than in 



