SMICRONYX WEEVILS—ANDERSON 219 
Measurements: The following measurements were taken from 2 
females from St. Simons Island, Ga. (CAS), 1 male and 1 female 
from Lake Okoboji, lowa (USNM), 1 female from Great Falls, Md. 
(USNM), 1 male from Camden Co., N.J. (CAS), 1 male from New 
Lots, Long Island, N.Y. (AMN&), 2 females from Ramapo Mountains, 
N.Y. (CAS), 1 male and 2 females from Valley of the Black Mountains, 
N.C. (AMNH). All measurements are in millimeters: 
Males Females 
Mean Extremes Mean Extremes 
Body length 2. 30 2. 20-2.40 2.30 2. 10-2. 40 
Elytra length 1. 43 1.40-1.50 1.47 1. 40-1. 55 
Elytra width at base 0. 90 0. 83-0.96 0.95 0. 86-1. 03 
Prothorax length 0. 59 0.65 0. 56-0. 69 
Prothorax width 0. 68 0. 66-0.69 0.72 0. 69-0. 76 
Rostrum length 0. 83 0. 79-0.86 0.88 0. 83-0. 92 
Rostrum length before antennal 0. 28 0. 26-0.30 0.35 0. 33-0. 40 
insertion 
Funicular segment 2 length 0. 068 0.060 0. 051-0. 068 
Funicular segment 3 length 0. 051 0.043 0. 034-0. 051 
Brotoay: Pierce (1907) reported S. tychoides breeding in Cuscuta 
arvensis Beyr. (now a synonym of C. pentagona Engelm.) and para- 
sitized by Bracon Smicronygis Ashmead (mss. name) near Washington, 
D.C., on July 24. Pierce also stated that S. tychoides had been reared 
from Cuscuta stem galls on August 1 at Victoria, Texas, by A. C. 
Morgan and C. R. Jones. The larvae entered the ground before 
pupating. 
Hamilton (1886) reported collecting S. tychoides from Ambrosia 
integrifolia (a form of A. trifida Linnaeus according to Fernald, 1950) 
in August. The locality of these observations was not given, but 
Hamilton lived in Allegheny, Pennsylvania, and may have made the 
observations in that area. The specimens were identified by Dr. Horn, 
and, judging from Hamilton’s description of them, they probably were 
S. tychoides. 
The host-plant records which follow were taken from the material 
examined: “Ex galls on Cuscuta gronovii,’’ New Lots, Long Island, 
N.Y., Aug. 10 (AMNH); ‘“‘Reared from gall on dodder,’’ Dow’s Swamp, 
Ottawa, Ontario, Aug. 7 (CNC). 
Discusston: The only other species with which S. tychoides could 
easily be confused (and is confused in collections) is S. sculpticollis 
Casey, which it resembles in respect to general body shape and pro- 
portions, body color, and elytral scale pattern. As stated in the key 
on page 217, the two species may be distinguished by the deeply sculp- 
tured prothorax and rufous elytra of S. sculpticollis as opposed to the 
shallowly punctured prothorax and narrow red elytral vittae of VS. 
