274 PROCEEDINGS OF THE NATIONAL MUSEUM Vou. 113 
New Mexico, 1 male from Medicine Hat, Alberta, 1 female from 
Okmulgee, Okla. (USNM), and 1 female from Grove Co., Kans. 
(USNM). All measurements are in millimeters: 
Males Females 
Mean Extremes Mean Extremes 
Body length 2. 60 2. 40-2. 70 2. 87 2. 85-2. 90 
Elytra length 1. 75 1. 60-1. 90 1. 95 1. 90-2. 00 
Elytra width at base 1. 08 1. 03-1. 22 125 1. 22-1. 29 
Prothorax length 0. 68 0. 66—0. 73 0. 72 0. 69-0. 76 
Prothorax width 0. 83 0. 76-0. 89 0. 89 0. 86-0. 92 
Rostrum length 1. 00 0. 96-1. 06 ie ata 1 OSG 
Rostrum length before antennal 0. 35 0. 33-0. 36 0. 52 0. 49-0. 56 
insertion 
Funicular segment 2 length 0.105 0.102-0.119 0.102 
Funicular segment 3 length 0.056 0.051-0.068 0.068 
Brotocy: The only available biological information on this species 
is a single host-plant record, ‘‘on Coreopsis,’”’? Okmulgee, Okla., June 
24 (USNM). 
Discussion: Blatchley and Leng (1916) considered S. centralis 
(Dietz) a synonym of S. corpulentus LeConte because they could not 
separate the two species on the basis of Dietz’ description of S. 
centralis. However, Dietz failed to mention that the interspaces of 
the prothoracic disk are raised into rugae, that the prothorax punc- 
tures are transversely ovate, and that the femora are reddish in his 
single specimen. None of the last-mentioned characteristics are 
shared by S. corpulentus. 
The type and only specimen of Pachyphanes lateralis Dietz differs 
slightly from the type specimen of Smicronyz centralis Dietz in having 
a sutural stripe of light brown scales on the elytra and in not having 
distinct transverse rugae on the disk of the prothorax. However, 
because there is otherwise so little difference between those specimens, 
the type of P. lateralis is interpreted here as a variant specimen of S. 
centralis. 
Distripution: Present records indicate that this species may be 
found in the southern and northern portions of the interior plains. 
Future collections may reveal the presence of S. centralis in the central 
portion of that region. The following specimens were examined: 
ALBERTA: Lethbridge, June 5 and July 12 (CNC); Medicine Hat, June 14 
(CNC). 
OKLAHOMA: LEFLORE Co.: Wister, July 3 (USNM). oxKMULGEE co.: Okmulgee, 
June 24 (USNM). 
New MExIco: TORRANCE co.: No data (USNM). 
TEXAS: BOWIE co.: New Boston, June 5 (USNM). LASALLE co.: Cotulla, 
April 15 (USNM). ‘Tex.’? (USNM). 
Total specimens examined: 11. 
