June i 9 oo.] Casey: On North American Coleoptera. 161 



latter behind the middle ; on the under surface white throughout. Length 1.8- 



1.95 mm. ; width I.15-I.25 mm. Texas (El Paso) parvus, sp. nov. 



6 — antennae Ii-jointed, the club subparallel, consisting of three connate joints, the 



two basal slightly transverse; scales elongate. [Nathrenus, sg. nov.] 7 



Antenna; S-jointed, the club consisting of two closely connected joints. [Florilinus]..S 

 Antennae 5-jointed, the club consisting of a single very elongate claviform joint. 



[Helocerus] .' 10 



7 — Oblong-oval, moderately convex, black, clothed with yellow, black and white 

 scales, largely black on the median parts of the pronotum, the basal lobe always 

 with whitish scales, the elytra with a transverse zig-zag pattern of pale scales, 

 largely white bordered with yellow in two fascice. Length 1. 8-2. 8 mm. ; width 

 1. 25-1. 75 mm. Europe and Eastern United States ; \varius Fabr.] 



verbasci Linn. 



Var A — Similar but more narrowly oblong-oval, the yellow scales still narrower, 



more elongate and more dispersed over the entire surface, the pattern of verbasci 



scarcely traceable and the scales more isolated among themselves. Length 



2.2 mm. ; width 1.3 mm. Virginia (Norfolk) pistor, v. nov. 



Var B — Nearly similar to verbasci but larger and more broadly oblong, the 

 yellow scales entirely covering the pronotum, the elytral pattern nearly 

 similar but with the yellow scales more dispersed, the white patches similar 

 in position but larger. Length 2.8-3.0 mm. ; width 1.8-2. 15 mm. In- 

 diana vorax, v. nov. 



Var C— Almost similar to vorax but very much smaller, the yellow scales 

 densely clothing the entire surface, except where replaced by the equally 

 dense white scales in patches similar in position to those of verbasci ; form 

 more broadly rounded than in the European nebidosus ; scales broader than 

 in verbasci. Length 1. 7-2.2 mm. ; width I.15-I.6 mm. Iowa (Keokuk). 



destructor Melsh. 

 Var D — Similar to verbasci but larger and more broadly oblong-oval, the zigzag 

 pattern of the elytra equally well marked but with the post-median fascia more 

 sharply anteriorly angulate near the suture, the surface when denuded show- 

 ing feebly impressed longitudinal lines. Length 3.0 mm. ; width 2.2 mm. 



Central America substriatus, v. nov. 



8 — Basal joint of the antennal club subquadrate, the second nearly twice as long as 

 wide ; body piceous, rather sparsely clothed with scales which are less decum- 

 bent, elongate and with oval cross-section and concave apices, the pale scales less 

 numerous than the darker ones and irregularly disposed, the dark scales ap- 

 parently flatter and more decumbent ; elytral punctures fine but rather deep, 

 moderately sparse. Length 2.9 mm. ; width 1.75 mm. Europe. 



museorum Linn. 



Basal joint much smaller, transversely obtrapezoidal, the second relatively shorter and 



but little longer than wide apparently in both sexes ; scales less elongate, flatter, 



more decumbent and triangular, the punctures very shallow. America 9 



9 — Antennal funicle moderately stout, the third joint about one-half as thick as the 

 second ; pale scales of the elytra strewn without order toward base but forming 

 two somewhat evident transverse fascia; behind the middle, the scales all broadly 

 triangular and coarsely strigose ; body castaneous in color, evenly and not very 



