junei9oo.] Casey : On North American Coleoptera. 141 



Male club relatively still shorter, the last joint but slightly more than twice as long 

 as the two preceding combined ; prothorax less transverse and less strongly and 

 densely punctured, not quite twice as wide as long, the male narrower and the 

 female larger than in dcficiens. Length $ 2.8-3. 1, 9 3-^-4-5 """■; width $ 

 1.4-1.65, 9 2.0-2.4 mm. Iowa (Keokuk) and Nebraska; \^spiirius Lcc, flor' 

 icola and obscuriis Mels., i. litt.] cylindricornis ^oy 



8 — Body nan-owly oval or oblong-oval, the head and pronotum strongly and moder- 

 ately closely punctured, the elytra unusually sparsely and much less coarsely so ; 

 hypomera but feebly concave ; last joint of the male antennae black, longer than 

 the entire preceding part and four times as long as the two preceding joints com- 

 bined ; female club black ; under surface piceous, the legs ferruginous through- 

 out. Length $ 2.9, 9 3-6-4.1 mm.; width ^1.35, 9 1. 7-2.1 mm. Cali- 

 fornia to Utah rufipennis Lee. 



9 — Head and pronotum generally blackish-piceous, the elytra rufous, the entire body 

 sometimes testaceous; hypomera deeply concave; punctures moderately dense, 

 those of the pronotum finer than the elytral ; male club very elongate and 

 sler.der, the last joint contorted distally, longer than the entire preceding parts. 

 Length $ 3.2, 9 4-9 mm.; width $ 1-65, 9 2.4 mm. Towa (Keokuk); 

 {(iichrous Lee] bicolor G. ^^ H. 



Head and pronotum blackish, the elytra somewhat, but not very noticeably, paler 

 piceo-rufous ; in body and antennae nearly similar to bicolor, the former obviously 

 narrower and i^elatively more elongate-oval. Length $ 2.9-3.4, 9 4-4 mm.; 

 width $ 1. 4-1. 7, 9 2.1 mm. Nebraska to Utah elongatulus, sp. nov. 



As may be inferred from the detailed measurements given in the 

 table, the female is generally very much larger than the male, but in 

 cxtricatiis and dcficiens \\iQxc is greater equality in this respect, judging 

 from the material accessible to me. The discriminative work hitherto 

 bestowed upon this comparatively monotonous, and consequently less 

 interesting, genus, has been very superficial, and detailed study of the 

 male antennae reveals a variety of 

 structure too great apparently to be ^"" ^■ 



the result of fortuitous variation ; 

 some of the names proposed by 

 LeConte must therefore be restored 

 to specific weight ; rufipennis is, in 

 fact, quite isolated as a species — more . "^, , , r ^.. 



^ '■ 1 I, Antennal club of Attagenus extrt- 



so than pellio when compared with catus $; ■2,%3.m^oi A.cyiiudricomis: ■>, 



, • r„ „ „ _i„ T'U J- same of A. dc/iciens ; 4, same o{ A. e/o/iga- 



hiccus lor example. Ihe diagrams , , ■' /* ,, , , 



' jr o tulus : 5, antenna 01 Ueart/irus longuius. 



given in the accompanying cut will 



serve to show some of the variations in the club of the male antennae, 

 and, although sonie variability in an organ so over-developed is to 

 be expected, it will be probably granted that such extreme variations, 



