326 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 113 
Grindelia squarrosa at Clarendon, Tex., by Pierce, and ‘‘on cotton” 
at Gurley, Tex., by A. C. Morgan. Pierce also stated that the hymen- 
opterous parasites Bracon dorsator Say and B. mellitor Say were bred 
from larvae of S. scapalis by F. C. Pratt. 
The host records which follow were taken from the material exam- 
ined: “On Sideranthus rubignosus,’ Mexia, Tex., June 20 and 28 
(USNM); “Grindelia squarrosa,”’ Mexia, Tex., June 12 (USNM); 
“on Grindelia squarrosa,” Clarendon, Tex., Aug. 11 (USNM); ‘‘on 
Grindelia squarrosa,” Calvert, Tex., July 26 (USNM); “on Grindelia 
squarrosa,” Brownwood, Tex., May 21 (USNM). 
Discussion: Blatchley and Leng (1916) considered S. compar 
(Dietz) to be the female of S. scapalis, probably because the rostral 
differences between male and female are not as distinct in S. scapalis 
as in most species in this subgenus, and the male of S. compar was not 
known at that time. There is a superficial resemblance between the 
two species, but the female of S. compar has a terete polished rostrum, 
which is not expanded at the apex, as it is in the female of S. scapalis. 
The male of S. compar has a stout straight rostrum, which is unex- 
panded at the apex, and the median lobe of its genitalia is much more 
elongate than in S. scapalis. The illustration of S. seapalis, published 
by Blatchley and Leng (1916, after Hunter and Hinds, 1905) is 
incorrect in showing the tarsal claws as free at the base and in failing 
to show a transverse groove at the base of the rostrum. 
Distripution: The locality records of the material examined 
indicate that S. scapalis may be found in the southern portion of the 
interior plains region. The following specimens were examined: 
KANSAS: FINNEY Co.: Garden City (CAS), Garden City, June (CNHM, CNC, 
USNM). RENO co.: July 8 (CAS & USNM). sepewicxk co.: July 9 (USNM), 
Mount Hope, June 8 (CAS). “Kans.” (CAS). “Ks.” (CNHM). 
OKLAHOMA: GRANT co.: Medford, June 16 (CU). 
TEXAS: BROWN CO.: Brownwood, May 21 (USNM). cooxe co.: Gainesville, 
June 24 (USNM). pawuuasco.: Dallas, June 21 (USNM). DoN.Ey co.: Claren- 
don, Aug. 11 (USNM). Grayson co.: Denison, Aug. 26 (USNM). HUNT Co.: 
Lone Oak, Aug 11 (USNM). turmestone co.: Mexia, June 6-28 (USNM). 
NAVARRO Co.: Corsicana, July 6 (USNM). RoBErTSON co.: Calvert, June 6, 
July 26 (USNM). victorra co.: Victoria, Sept. 6 (USNM). 
Total specimens examined: 85. 
SMICRONYX CONSTRICTUS GROUP 
Description: Smaller species than those of the S. scapalis group, 
not over 4 mm. in length. Rostrum of female slender, smooth and 
shining before antennal insertions, much longer than that of the 
male, moderately curved; unexpanded at apex in both sexes (figs. 28, 
