1955] 
Valentine — Macrocephalus bidens 
101 
The species described as Toxonotus tritub erculatus Suf- 
frian, 1870, has been transferred to Neanthribus by Wolf- 
rum (1930). Judging by Suffrian’s description, the species 
properly belongs in Phoenicobiella or in a new genus. It 
is obviously one of the key species in the intergrading 
generic complex mentioned above. The two remaining 
species of Toxonotus can be distinguished by the following 
key and short diagnoses. 
1. Apex of prothorax with two patches of extremely 
dense, pale, brown pubescence, one on either side 
of the median line ; elytral pubescence striped, 
even-numbered interspaces bluish gray, odd-num- 
bered ones brown or brown flecked with white 
Toxonotus fas cicularis (Schon.) 
2. Apex of prothorax without patches of denser pubes- 
cence, instead with two short, curving, white lines ; 
elytral pubescence not striped, brown to brownish 
gray Toxonotus bidens (Olivier) 
Toxonotus fascicularis (Schonherr) 
Anthribus fascicidaris Schonherr, 1833, Genera et Spe- 
cies Curculionidum 1(1) :132. Type locality: Cuba. 
Integument dark brown to black except for antennae, 
apices of femora, tibiae, and tarsi which are paler. Pub- 
escence very short; on prothorax variegate with gray and 
brown, two large patches of dense pale brown extending 
from lateral discal tufts to apex; on elytra sparse, striped 
with gray and brown as mentioned in key, sometimes with 
first three interspaces heavily dusted with white, declivity 
with a sharply contrasting, dense white patch which at- 
tains the apical margin only along the suture, this sutural 
connection sometimes partially or completely interrupted; 
on metasternum gray to white. Antennae with segments 
11, 10, and the distal portion of 9 dark brown to black, 
contrasting sharply with the remainder which is gray. 
This species ranges throughout southern Florida and 
Cuba. The northernmost locality known to me is Enter- 
prise, Volusia County, Florida. Two hundred and eight 
specimens examined; of these, two from Baragua, Cuba, 
were colleced at light by L. C. Scaramuzza in May. No 
other biological data available. 
