260 MEMOIRS ON THE COLEOPTERA 



not foveate; prothorax not twice as wide as the median length, the sides 

 strongly converging and nearly straight, gradually rounded moderately 

 beyond about the middle; surface finely and rather sparsely punctured, 

 gradually more strongly but not densely so toward the sides and with 

 confused punctures along the base, not at all impressed antero-laterad; 

 marginal groove fine; scutellum very small, subequilateral; elytra one- 

 half longer than the prothorax, broadly rounded and but feebly inflated 

 at the sides basally, extremely smooth and polished, with only extremely 

 minute sparse punctulation visible posteriorly, the four discal striae fine, 

 smooth, inwardly hooked at base, gradually but rapidly shorter, the 

 outer extending to apical fifth, the fourth arcuately uniting at base with 

 the sutural, which is feeble except basally, though extending very nearly 

 to the apex; outer subhumeral short and fine, subbasal and very close 

 to the lateral stria, the inner a very short fine line just behind the middle, 

 the oblique humeral excessively fine; mesosternum scarcely more than 

 twice as wide as long, sparsely and strongly punctate; anterior tibiae 

 with obtuse external crenulation in the type; pygidia not very coarsely 

 but strongly and densely punctate. Length 3.2 mm.; width 2.5 mm. 

 California (Palm Springs). A single example. 



This remarkably isolated species, not only in sculpture but in 

 coloration, the latter reminding us somewhat of palmatus Say 

 (dimidiatipennis Lee.), may stand at the end of Group IV. 



Two examples at hand, from Michigan and Golden, Colorado, 

 answer rather well to the description of posthumus Mars., as given 

 by Horn ; in the former example, there is however no trace of an 

 external subhumeral stria, said to be distinct in posthumus by 

 Marseul. There are evidently a number of forms allied to post- 

 humus and obsidianus, the latter being very distinct by reason of 

 the transverse, medially interrupted frontal stria and total absence 

 of either the outer or inner subhumeral stria of the elytra. 



Saprinus moniliatus n. sp.- Small, convex, ovoidal, very shining, black, 

 the legs piceous; head even, without striae of any kind, finely, loosely 

 punctate; prothorax distinctly less than twice as wide as long, the 

 moderately converging sides nearly straight, gradually more and more 

 arcuate beyond about the middle, the marginal groove strong, inwardly 

 slightly hooked behind and not quite attaining the base; surface mi- 

 nutely, sparsely punctulate, the punctures gradually becoming coarse and 

 close broadly toward the sides, the base with confused punctures, coarser 

 medially than laterally, without medio-basal or antero-lateral depres- 

 sions; elytra not quite one-half longer than the prothorax, broadly and 

 feebly inflated basally, strongly and closely punctate, the punctures 

 abruptly obsolete at the ends of the striae, and at about basal third near 

 the suture; four discal striae evenly curved, parallel, punctate, not hooked 

 at base, the first extending three-fifths, the other three equal and extend- 

 ing to the middle, the fourth arched at base, joining the sutural, which is 



