100 
Psyche 
[September 
on the first tarsal segment. It occurs in some males of 
Piesocorynus mixtus Leconte; however, in this species the 
spine, when present, is on the ventral surface, and is usu- 
ally subapical in position. The genus is further character- 
ized as follows: rostrum and interocular area with a medi- 
an carina which is interrupted 'by a deep, sharply limited 
pit located opposite the lower limit of the eyes; trans- 
verse carina of prothorax basal, fitting against the bi- 
convex basal margin of the elytra; dorsal surface of the 
prothorax and elytra ornamented with tufts of erect pu- 
bescence and a lateral fringe; tibiae with long, erect, pale 
pubescence giving a bottle^brush effect; tarsi with the 
above-mentioned spine on the first segment, and the third 
segment not conspicuously dilated into a broad pad, the 
lobes free, not conate; antennae of males three-fourths to 
one and one-half times the total length of the body, of 
females up to one-half the length of the body; eyes with 
the margin adjacent to the antennal scrobes strongly 
emarginate. 
The relationships between Toxonotus and the related 
genera Neanthribus, Phoenicobiella, and Platystomos are 
extremely complex. It is evident from a study of all four 
genera and many species that three distinct evolutionary 
lines are present, plus several connecting forms. The 
three lines are climaxed by Platystomos in the Old World, 
and Neanthribus and Phoenicobiella in the New, with 
such forms as the two Toxonotus species and “Neanthri- 
bus” lividus Lee. and tntuberculatus Suffr. as the inter- 
mediate links. There are several other intermediate forms 
also, but it is not my intention to discuss them here; at 
least one is still undescribed, and the subject will be cov- 
ered in detail in a generic revision of the North American 
fauna soon to be ready for publication. I have mentioned 
this complex now only so that other coleopterists familiar 
with the group might see the problem too, and perhaps 
lend pertinent material, for I particularly need Antillean 
specimens and exotic Neanthribus and Platystomos species. 
As a matter of fact, even locality records and biological 
data for United States species would help considerably 
in deciphering the complex zoogeography and relationships. 
