SMICRONYX WEEVILS—ANDERSON 279 
Subgenus Pseudosmicronyx Dietz, 1894 
Pseudromicronyx Dietz, Trans. Amer. Ent. Soc., vol. 21, p. 156, 1894. Type 
species here designated: T'ychius corniculatus Fahraeus, 1843. 
Pseudosmicronyx Klima, in Schenkling, Coleopterorum catalogus . . . vol. 28, 
part 140, p. 90, 1934. (Emendation.) 
Synertha Dietz, Trans. Amer. Ent. Soc., vol. 21, p. 172, 1894. Type species 
here designated: Smicronyx imbricatus Casey, 1892. 
Descriprion: Rostrum moderately curved in both sexes; longer, 
much smoother and more polished before the antennal insertions in 
the female than in the male (figs. 7, 25) except in S. wmbricatus Casey. 
Antennae inserted at the approximate middle of the rostrum in the 
female (fig. 7), slightly anterior the middle in the male (fig. 24). 
Second segment of the antennal funicle distinctly longer than the 
third segment (fig. 33). External lobes of the mandibles moderately 
developed (fig. 46). Prosternum emarginate at the anterior margin 
and concave, but without distinct antecoxal ridges (fig. 36). Humeri 
well developed and the scutellum small but distinct (figs. 6, 23). 
Tarsal claws less connate and more divergent than in the subgenus 
Smicronyz (figs. 39, 41). Median lobe of the male genitalia varying 
from one species to another in length, lightly sclerotized dorsally and 
ventrally, the sides subparallel (figs. 76-92). Arms of the spiculum 
ventrale of the female genitalia elongate, forming a V, not a U, in 
all but the S. griseus and S. imbricatus groups (figs. 134, 135). 
Host puants: The majority of the plants recorded as hosts or possible 
hosts of species in this subgenus belong to the family Compositae, 
but representatives of some other families have been recorded as 
possible hosts (see table 1). 
DIsTRIBUTION: Species presently placed in Pseudosmicronyx have 
been recorded only from North America. 
Discussion: As in the works of Champion (1902) and Pierce 
(1939), the genus Synertha is being treated here as part of the genus 
Smicronyz. Pierce pointed out that a number of species (including 
S. sculpticollis Casey, S. tychoides LeConte and S. stlaceus Casey) 
which were not originally included in Synertha have their eyes nearly 
contiguous ventrally, as in S. imbricatus (the only valid species 
originally included in Synertha). The nearly (or actually) contiguous 
condition of the eyes was the character used by Dietz (1894) to 
separate Synertha from MSmicronyr. Because S. sculpticollis, S. 
tychoides, and S. silaceus all share the general characteristics of the 
subgenus Smicronyx, and S. imbricatus exhibits the general character- 
istics of the subgenus Pseudosmicronyz, it is apparent that the distance 
