Casey — Observations on the StapJiylinidae. 167 



minute punctulation finer and sparser; antennae slender, only very 

 slightly and gradually incrassate distally, bai-ely one-hnlf longer than 

 the head, the second joint as long as the next two together, the tenth 

 three-fourths wider than long, the eleventh as long as the preceding 

 two combined, very obtusely pyriform, truncate at tip; prothorax un- 

 usually elongate, only just visibly wider than long, fully ;is wide as the 

 elytra, the sides moderately converging from base to apex and feebly ar- 

 cuate; basal angles broadly rounded as usual, the median l>>be of the base 

 strongly rounded; elytra short, the sides much shorter than the sides 

 of the prothorax, the suture two-thirds as loti<i as the median line, the 

 punctures very coarse and asperate but much less close-set than in 

 sulcicoUis, the flanks impunctate, narrowly at base, very broadly and 

 almost to the lower edge behind, with a few punctures just behind the 

 humeri; discal punctures externally tendiuii to form oblique series; 

 abdomen slightly narrower than the elytra, parallel, fiuelv, rather closely 

 punctate, somewhat broadly impunotite along the middle; hind tarsi 

 fully as long as the tibiae, the basal juititalmosv, a>* long as the next three 

 combined. Length 4.5 mm.; widtti 1.05 mm. California (San Diego). 



debilicoriiis n. sp. 

 Moderately slender and much smaller, convex, parallel, polished, black, the 

 elytra dark piceo-rufous throughout, the legs and antennae pale brown- 

 ish red; head relatively large, three-fifths as wide as the prothorax or 

 more, with a few large t.catiered punctures, the antennae nearly as in 

 the preceding but somewhat more rapidly incrassate distally, the sec- 

 ond joint scarcely as long as the next two combined, the tenth twice as 

 wide as long, the eleventh more pointed; prothorax fully as wide as the 

 elytra, scarcely a fifth wider than long, the sides only slightly converg- 

 ing from base to apex and distinctly arcuate, punctured nearly as iu 

 the other species, except that the punctures near the base, just outside 

 of the sulci, tend to form a short transverse series, the minute punctula- 

 tion very fine, sparse and indistinct; elytra rather short, moderately 

 transverse, the sides equal in length to those of the prothorax, 

 the suture fully two-thirds as long as the median line, the punctures 

 very coarse and asperate but less close-set than in sulcicoUis and tend- 

 ing to form oblique series throughout, the upper part of the flanks im- 

 punctate except before the middle, very broadly so behind; hind tarsi 

 even somewhat longer than the tibiae but with the bas.il joint only as 

 long as the next two combined. Length 2.7-2.9 mm.; width 0.(55 mm, 

 California (San Diego) cylindrella n. sp. 



The tendency of the coarse elytral punctures to range 

 themselves into oblique series in cylindi'ella and partially so 

 in debilicornis, is a rather singular character; this tendency 

 is not so obvious in the first three species of the table, and, 

 where observable at all, the series are less oblique; the large 

 impunctate areas at the sides of the elytra are also a dis- 

 tinguishing feature as in many Xantholinids. 



