June i 9 oo.] Casey : On North American Coleoptera. 85 



short, those of the discal series extremely short and almost obsolete ; head and 

 pronotum finely and feebly punctate, the latter shorter and more transverse, al- 

 most twice as wide as long, the sides similarly parallel and arcuate, the feeble 

 punctures becoming almost completely obsolete toward the sides; elytra nearly simi- 

 lar to those of pidchcUus but shorter and more obtuse, three times as long as the 

 prothorax and distinctly wider, the punctures sparse and very fine. Length 



1.2 mm.; width 0.59 mm. Arizona (Tucson) obsoletus, sp. nov. 



3 — Body smaller, shorter and more broadly oval than in the preceding, convex, 

 polished, dark rufous, the elytra black, pale in the basal regions and broadly at 

 apex, except transversely at apical fourth ; antenna; longer than the head and 

 prothorax, the latter short and strongly transverse, finely and sparsely but 

 strongly punctate, the sides parallel and arcuate ; elytra short, but little longer 

 than wide, ogival at apex, coarsely, rather closely and conspicuously punctured. 

 Length 1. 0-1. 1 mm.; width 0.5-0.55 mm. P'lorida (Tampa). .. hirtellus Schz. 



A small specimen from North Carolina may possibly represent a 

 distinct species or subspecies of pulchellus ; it is smaller, more obtuse 

 behind and somewhat differently colored. The strong basal margin 

 of the elytra enclosing a series of foveas along its posterior edge, is a 

 marked feature of this genus and it is this which causes the minute 

 denticulation of the elytral humeri mentioned above. 



Cryptophagini. 

 This tribe differs from all those which precede primarily and very 

 radically in the structure of the tarsi, which, instead of being shorter 

 and stout, frequently lobed beneath, with the fourth joint very small 

 and pentamerous in both sexes, are here more or less slender and fili- 

 form, never lobed beneath, with the fourth joint similar to the preced- 

 ing and pentamerous in the females and heteromerous in the males, 

 as in the Caenoscelini of the next subfamily. From the Telmatophilini 

 they differ besides, as a rule, in a coarser and denser sculpture and 

 vestiture, stouter antennae, with less loosely connected club and less 

 coarsely faceted eyes than in Telmatopliilus and Loberus. The first 

 segment of the abdomen is usually more elongate, being subequal to 

 the next two combined, and never has diverging lines ; the sutures are 

 straight throughout the width, differing in this respect from Canoscelis. 

 The genera are rather numerous, those before me being readily recog- 

 nizable by the following characters : — 



Eyes ante-basal, small, rather finely faceted and not prominent ; frontal margin deeply 

 emarginate and impressed at the middle, especially in the male, the front not at 

 all prolonged beyond the antennae, the basal joint of the latter large and glob- 

 ular, the second similar to the third and following, the club rather feebly de- 



