SMICRONYX WEEVILS—ANDERSON 320 
29). Second funicular segment of antenna subequal to the first, 
much longer than third segment. Emargination of prosternum 
subquadrate. Humeri of elytra prominent, declivities distinct. 
Third tarsal segment much broader than first two segments. Median 
lobe of male genitalia much more elongate than in the S. scapalis 
group (compare figs. 93, 94, 95). 
Discussion: The species in this group are similar to those of the S. 
fulvus group, but the rostra are moderately curved in the females and 
the prosternal emargination is subquadrate, as opposed to an almost 
straight rostrum and rounded prosternal emargination in the S. fulvus 
group. 
Map 18 gives the distribution of this group. 
Map 18.—Distribution of the specimens examined of the constrictus group of Smicronyx. 
O, S. constrictus; A, S. pinguis; ¥, S. sparsus. 
Key to the Species of the constrictus Group 
1. Scales of the elytra uniform in size, tarsi black to piceous. . ..... 2 
Scales of the elytra of two sizes, tarsi distinctly reddish brown. 
S. pinguis Blatchley (p. 330) 
2. Smooth median line of prothorax broad, well defined toward the apex of 
prothorax, antennal club shining, usually glabrous at the base. 
S. sparsus Casey (p. 331) 
Smooth median line of prothorax narrow, poorly defined if present, antennal 
club not shining or glabrous at the base . . S. constrictus (Say) (p. 328) 
