SMICRONYX WEEVILS—ANDERSON 275 
SMICRONYX LINEOLATUS GROUP 
DescrieTion: Prothorax much as in the S. discoideus group, but 
at least slightly constricted at apex; punctures of disk transversely 
elliptical, interspaces raised to form transverse ridges; scales of the 
disk oriented toward midline, not the center, of disk. Elytra broadest 
at the base in all species, the humeri fairly prominent. Not marked 
with a patch of dark scales on either prothorax or elytra. 
Discussion: This group is apparently most closely allied to the 
S. discoideus group on the basis of the pronotal punctures, which are 
transversely elliptical in this group and in S. centralis (Dietz) of the 
discoideus group. 
Map 9 gives the distribution of this group. 
Key to Species of the Smicronyx lineolatus Group 
1. Antennae and femora black or piceous; fifth intervals of elytra bearing nearly 
complete vittae of white scales; short white vittae at bases of third inter- 
vals and behind humeri; vittae not joined to form a diagonal line on each 
ElyiGLOM Gp -eMes, ernicme caver Fen “ey bales ae Ate . . S. lineolatus Casey (p. 275) 
Antennae and femora distinctly reddish; incomplete vittae of fifth, sixth, 
and seventh elytral intervals joined to form a distinct diagonal white line 
on each elytron; no short white vitta present at base of third interval. 
S. triangularis (Dietz) (p. 277) 
Smicronyx lineolatus Casey 
Ficures 48, 49, 124 
Smicronyx lineolatus Casey, Ann. New York Acad. Sci., vol 6, pp. 385-386, 1892. 
Lectotype, here designated: Male, Illinois, USNM 36698 (T. L. Casey 
collection). 
Description: Rostra of both sexes black, stout, strongly curved, 
closely but not coarsely punctate and thinly squamose behind the 
Map 9.—Distribution of the specimens ex- 
amined of the lineolatus group of Smi- 
cronyx. @, S. lineolatus; A, S. triangu- 
larts. 
