308 PROCEEDINGS OF THE NATIONAL MUSEUM Von. 113 
TEXAS: COLORADO co.: Columbus, Aug. 20-21 (USNM). aGo.rap co.: Sept. 
8 (USNM). HARRISON Co.: Marshall, June 7(USNM). victoria co.: Victoria, 
June 12, Sept. 16 (USNM). ‘‘Tex.” (AMNH). 
Total specimens examined: 28. 
Smicronyx tesselatus Dietz 
Ficure 86 
Smicronyz tesselatus Dietz, Trans. Amer. Ent. Soc., vol. 21, p. 134, 1894. Lecto- 
type, here designated: Male, District of Columbia, MCZ 1895 (Dietz 
collection). 
Smicronyz impressirostris Dietz, Trans. Amer. Ent. Soc., vol. 21, p. 135, pl. 8, 
figure 10, 1894. New synonymy. Lectotype, here designated: Male, 
Southern Illinois, MCZ 1897 (Dietz collection). 
Description: Rostra of both sexes piceous, moderately curved, 
sparsely punctate from base to apex; surface dull, granular behind 
antennal insertions; two fine dorsomedial carinae present toward apex 
in male, feebly indicated behind antennal insertions in female; more 
tapered and shining before antennal insertions in female than in male. 
Head black to piceous, thinly squamose in front. Antennae piceous, 
their scales pale brown. Prothorax black to piceous; shape and 
punctures as in group description; scales ovate to elliptical, light 
brown with a scattering of white; prosternum shallowly emarginate, 
moderately concave, antecoxal ridges feebly indicated. 
Elytra black to piceous; moderately inflated, intervals covered with 
ovate scales, which are light brown with a few narrow, broken, trans- 
verse bands of white scales. Underside of thorax and abdomen 
black, closely covered with broadly ovate, white scales. Femora 
piceous, covered with ovate and linear, pale brown scales. Tibiae 
piceous, thinly covered with linear, pale brown scales. Tarsi black; 
first three segments short and broad; fourth segment extending well 
beyond third; claws connate near their bases, slightly divergent. 
Median lobe of male genitalia bluntly V-shaped at apex; internal sac 
not exceeding median lobe, orificial plates not fused (fig. 86). 
MerasurEMENTs: The following measurements were taken from 7 
males and 5 females from Lake Okoboji, Iowa (USNM) and 3 males 
and 3 females from Havana, Ill. (USNM). All measurements are in 
millimeters : Males Females 
Mean Extremes Mean Extremes 
Body length 2. 20 2. 00-2. 40 2.28 2. 10-2. 50 
Elytra length Ti, tll 1. 40-1. 70 1.03 1. 40-1. 60 
Elytra width at base 0. 83 0. 73-0. 92 0.89 0. 83-1. 06 
Prothorax length 0. 58 0. 49-0. 63 0.58 0. 53-0. 66 
Prothorax width 0. 67 0. 59-0. 73 0.69 0. 59-0. 73 
Rostrum length 0. 92 0. 83-1. 00 1.00 0. 89-1. 06 
Rostrum length before antennal 0. 32 0. 30-0. 36 0.43 0. 40-0. 49 
insertion 
Funicnlar segment 2 length 0.070 0. 068-0.085 0.079 0. 068-0. 085 
Funicular segment 3 length 0.044 0. 034-0.051 0.047 0. 034-0. 051 
