234 PROCEEDINGS OF THE NATIONAL MUSEUM Vou. 113 
Elytra dark brown, moderately convex dorsally; humeri prominent, 
declivities distinct; slightly wider behind the middle than at base, 
scales ovate, brownish and gray, the gray scales arranged in rather 
indefinite transverse bands. Scutellum small, shining. Venter of 
thorax and abdomen covered with grayish white scales similar to gray 
scales of elytra in shape and size. Femora clavate, sparsely covered 
with linear scales. Tibiae not greatly expanded toward apex, sparsely 
covered with rows of linear grayish scales. Tarsal segment 3 much 
broader than first two and deeply bilobed; segment 4 of moderate 
length; claws slightly divergent, connate for slightly less than half 
their length. 
MerasureMEnts: The following measurements were taken from the 
type specimen (a female) and a male from Cedar Bluffs, Nebr. 
(USNM). All measurements are in millimeters: 
Male Female 
Body length 3. 10 3. 40 
Elytra length 2: 20 2. 40 
Elytra width at base 1. 30 1. 40 
Prothorax length 0. 80 0. 90 
Prothorax width 0. 90 1. 00 
Rostrum length 1. 30 1. 40 
Rostrum length before anten- 0. 55 0. 60 
nal insertion 
Funicular segment 2 length 0. 085 0. 102 
Funicular segment 3 length 0. 068 0. 068 
BioLocy: At present, no information is available on the biology 
of this species. 
Discussion: Although S. perfidus resembles most of the rest of 
the species of the S. sculpticollis group in respect to general body 
shape, body proportions, and elytral scale pattern, it does not re- 
semble any of those species closely enough to be easily confused with 
them. The confluent punctures on the prothorax form a pattern of 
channels similar to that on the prothorax of S. vestitus LeConte, but 
the elytra are reddish and their scale pattern plain in S. vestitus as 
opposed to the dark brown elytra and banded scale pattern of S. 
perfidus. 
DistripuTION: The only known specimens of S. perfidus have been 
collected in the Iowa-Nebraska portion of the central lowlands. 
NEBRASKA: SAUNDERS CO.: Cedar Bluffs (USNM). 
Smicronyx fiducialis Casey 
Smicronyz fiducialis Casey, Ann. New York Acad. Sci., vol. 6, pp. 399-400, 1892. 
Type: Male, Iowa, USNM 36708 (T. L. Casey collection). 
Description: Rostrum black, moderately stout, moderately 
curved, subcarinate laterally and medially both before and behind 
