340 PROCEEDINGS OF THE NATIONAL MUSEUM Vou. 113 
Iowa City, Iowa (USNM), 2 males and 2 females from Silver Lake, 
Iowa (USNM). AII measurements are in millimeters: 
Males Females 
Mean Extremes Mean Extremes 
Body length 2. 57. 2. 40-2. 90 2.40 2. 00-2. 60 
Elytra length Ws 1. 60-1. 90 1.60 = 1. 40-1. 80 
Elytra width at base 1. 00 0. 96-1. 15 0.93 0. 79-1. 03 
Prothorax length 0. 66 0. 56-0. 79 0.59 0. 49-0. 66 
Prothorax width 0. 76 0. 69-0. 86 0.62 0. 56-0. 73 
Rostrum length 0. 94 0. 79-0. 106 118 1. 03-1. 25 
Rostrum length before antennal 0. 39 0. 30-0. 43 0.67 0. 56-0. 73 
insertion 
Funicular segment 2 length 0.092 0.085-0.102 0.084 0. 065-0. 119 
Funicular segment 3 length 0.054 0.051-0.068 0.046 0. 034-0. 051 
Biotoay: At present, one host record is available for this species: 
“host, Grindelia,” Rutland, Saskatchewan, Aug. 2 (CNC). 
Discussion: This species resembles S. sordidus LeConte in general 
body-shape and proportions, color aud arrangement of scales and pro- 
thoracic punctation, but S. sordidus is larger, has a clearly defined 
smooth, median line on the prothorax, and has a longer female rostrum 
than does S. humilis. In addition, the apex of the median lobe of the 
male genitalia is more angular at the sides in S. sordidus than in S. 
humilis, and the internal sac is much shorter than in S. humilis. 
DisrripuTion: Present records indicate that this species may be 
found in the central portion of the interior plains region. The fol- 
lowing specimens were examined: 
ILLINOIS: COOK co.: no data (CNHM). 
INDIANA: LAKE Co.: Hessville, May 30 (CNHM). 
Iowa: DELAWARE Co.: Silver Lake (USNM). picxinson co.: Lake Okoboji, 
July 17 and 28, Aug. 28 (USNM). sonnson co.: Iowa City (USNM). 
Manrirosa: Reston, Aug. 2 (CNC). 
SASKATCHEWAN: Pipe Lake, Aug. 10, Rutland, Aug. 2 (CNC). 
Total specimens examined: 31. 
Smicronyx compar (Dietz), new combination 
Fiaures 99, 145 
Desmoris compar Dietz, Trans. Amer. Ent. Soc., vol. 21, p. 123, 1894. Type: 
Female [Illinois], CM (Ulke collection). 
Description: Rostrum black, piceous at tip, slightly arcuate in 
both sexes, smooth and shining before antennal insertions, coarsely 
punctate and squamose behind antennal insertions in female; punc- 
tate and slightly squamose before antennal insertions in male. Head 
black, finely alutaceous, front densely squamose. Prothorax black, 
broadly rounded at sides, strongly narrowed and slightly constricted 
near apex; disk coarsely and closely punctate, thinly covered with 
