290 PROCEEDINGS OF THE NATIONAL MUSEUM Von. 113 
corniculatus. In addition, the apex of the median lobe of the male 
genitalia in this species is not distinctly broadened at the apex, as it 
is in S. corniculatus. 
Disrripution: Available locality records indicate that this species 
may be found at the eastern edge of the Great Basin section of the 
basin and range province. 
Smicronyx flavicans LeConte 
Ficures 78, 128 
Smicronyz flavicans LeConte, Proc. Amer. Philos. Soe., vol. 15, p. 171, 1876. 
Type: Male, Texas, collected by Belfrage, MCZ 1892 (J. L. LeConte col- 
lection). 
Smicronyx nebulosus Dietz, Trans. Amer. Ent. Soc., vol. 21, pp. 157, 158, 
1894 (preoccupied by Smicronyx nebulosus Tournefort, 1874). Lectotype 
here designated: Male, New Jersey, MCZ 1906 (Dietz collection). 
Smicronyz ornatipennis Dietz, Trans. Amer. Ent. Soc., vol. 21, p. 158, pl. 8, 
fig. 21, 1894. New synonymy. Lectotype, here designated: Female, 
Texas, CM (Ulke collection). 
Smicronyx maculatus Dietz, Trans. Amer. Ent. Soc., vol. 21, p. 162, pl. 8, fig. 
20a, 1894. New synonymy. Lectotype, here designated: Male, Allegheny 
Co., Pennsylvania, collected by Hamilton, MCZ 1911 (Dietz collection). 
Smicronyx dietzi Klima, in Schenkling, Coleopterorum catalogus . . ., vol. 28, 
part 140, p. 95, 1934 (replacement name for Smicronyx nebulosus Dietz, 
1894). New synonymy. 
Description: Rostra of both sexes piceous, moderately curved, 
squamose behind antennal insertions, basal tufts distinct; subcarinate, 
coarsely but not closely punctate from base to apex in male; slender, 
shining, finely and sparsely punctate before antennal insertions in 
female. Head deep reddish brown, finely alutaceous, front sparsely 
squamose. Prothorax piceous to reddish brown, broadly rounded at 
sides, narrowed and slightly constricted near apex; punctures of disk 
oval, subconfluent, interspaces forming low anterolaterally oriented 
rugae; scales ovate, yellowish, white, or ight brown in color, the 
white scales condensed at the sides; prosternum moderately emargi- 
nate, shallowly concave. 
Elytra dark reddish brown, humeri elevated; scales ovate, their 
colors same as the scales of prothorax; whitish scales condensed on 
humeri, on bases of third intervals and in indistinct, wavy transverse 
bands. Underside of thorax and abdomen covered with broadly 
ovate whitish scales. Femora moderately clavate, rufous, covered 
with elongate and ovate yellowish scales. Tibiae rufous, covered 
with elongate yellowish white scales. Tarsi ferruginous, third joint 
much broader than first two; fourth joint greatly exceeding third; 
claws connate only near their bases, fairly divergent. Median lobe 
of male genitalia having a transverse, partitionlike structure behind 
