576 Coleopterological Notices, F. 



Punctures of the elytra extremely dense, very narrowly separated. 



Prosternal grooves narrow behind, the intermediate posterior lobe wide and 

 distinct ; elytral punctures small ; pronotum less unequally divided. 



rigidus n. sp. 

 Prosternal grooves very wide behind, the enclosed posterior lobe minute, 

 compressed and subcariniform. 

 Pronotum closely punctate throughout, only a little more finely so ante- 

 riorly ; lateral margins broad CribratllS n. sp. 



Pronotum finely, closely punctate anteriorly, coarsely and much more 



sparsely so behind ; lateral margins narrower molestlis n. sp. 



Anterior prosternal lobe large but shorter and broader, not quite as long as 

 wide, very remotely punctate ; posterior lobe minute and subobsolete ; 

 elytral punctures longitudinally confluent ; sulcus deep. 



transversits Say. 

 Anterior lobe very small, wider than long, the posterior almost obsolete. 



Pronotum with the transverse line distinct throughout ; dorsal punctuation 



fine and remote ; larger species IlitidllS Horn. 



Pronotum with the transverse sulcus almost completely obliterated ; sculp- 

 ture coarse and not dense; size very small Iiarlielilli Mars. 



Of sayi and consors I have single examples, taken in Indiana 

 and Arizona respectively, of fraternus a large series taken in 

 various localities in California. JVam^versus occurred abund- 

 antly, and barbelini in smaller number, under the bark of unde- 

 composed stumps at Houston, Texas, the former also at Asheville, 

 North Carolina. My small series of nUidvs is from Siskiyou, 

 El Dorado and San Diego, California, the single example from 

 San Diego, given me by Mr. Dunn, not differing in any way from 

 the others. 



P. rigidllS. — Narrowly oblong-oval, moderately convex, shining, black, 

 the pronotum feebly picescent ; legs and antennal club pale ; all the punctures 

 bearing minute setae. Head finely, somewhat closely punctate; front only 

 very feebly concave. Prothorax two-fifths wider than long ; sides subparallel, 

 broadly rounded and feebly convergent toward apex, broadly sinuato-parallel 

 in basal half; lateral groove deep, entire ; marginal space rather wide, some- 

 v.hat feebly convex, strongly, densely punctate ; transverse sulcus deep, the 

 segments convex, the anterior only slightly, though distinctly, shorter than 

 the posterior, equally finely, deeply punctate, the anterior rather closel\'^, the 

 posterior a little more sparsely. Elytra feebly inflated toward base, quite 

 distinctly wider than the prothorax and one-half longer, not very coarsely but 

 strongly and very closely punctate, with two short feeble and oblique basal 

 striae externally ; suture elevated except near the scutellum ; inflexed flanks 

 devoid of stria or carina. Pijgidia rather finely but strongly, very densely 

 ])unctate, the propygidium less densely so ; punctures distinctly setulose. 

 Under surface coarsely, rather closely punctate throughout ; posterior lobe 



