276 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 113 
antennal insertions, finely and remotely punctate before the antennal 
insertions. Head black, finely alutaceous, the front sparsely squa- 
mose. Antennae black, the club elongate-ovate, thickly pubescent. 
Prothorax black; scales reddish brown and white, the white scales 
arranged in four rather indefinite vittae and a very short vitta at the 
middle near the base; prosternum moderately emarginate and 
concave. 
Elytra black, the white scales condensed, forming a full-length 
vitta on the fifth interval, and short vittae at the base of the third 
and seventh intervals; intervals otherwise covered by a mixture of 
dark brown, reddish brown and white scales, the reddish brown scales 
forming wavy transverse bands. Undersurface of the thorax and 
abdomen covered with a mixture of white and light reddish brown 
scales; metepisternum covered with white scales. Femora piceous, 
strongly clavate, covered with ovate, pale grayish scales. Tibiae 
piceous, covered with elongate light grayish scales; slightly expanded 
at their apices. Tarsi black, the first three segments rather short and 
broad; fourth segment exceeding the third by about half its own length; 
claws connate near the base, moderately divergent. Internal sac 
of male genitalia not extending back between the median struts, its 
apical portion armed with fine spines; spiculum gastrale expanded, 
but not hooked at the anterior end. Stem of spiculum ventrale of 
female genitalia moderately expanded at anterior end. 
MerasureMENts: The following measurements were taken from 2 
males and 1 female from South McAlester, Okla. (USNM), 2 males 
from Summit, Ill. (CNHM), 1 female from Southern Illinois (USNM), 
1 female from Corpus Christi, Tex. (USNM), 1 female from Victoria, 
Tex. (USNM), and 3 females from Weatherford, Tex. (USNM). All 
measurements are in millimeters: 
Males Females 
Mean Extremes Mean Extremes 
Body length 3. 10 2. 90-3. 30 3.30 2. 80-3. 50 
Elytra length 2. 10 2. 00-2. 20 2.15 1. 90-2. 40 
Elytra width at base 1. 28 1. 15-1. 32 1.32 1. 19-1. 45 
Prothorax length 0. 78 0. 73-0. 83 0.82 0. 76-0. 96 
Prothorax width 0. 91 0. 86-1. 00 0.97 0. 86-1. 06 
Rostrum length ily a kes 1. 12-1. 22 1.36 1. 25-1. 45 
Rostrum length before antennal 0. 38 0. 33-0. 46 0.62 0. 53-0. 66 
insertion 
Funicular segment 2 length 0.131 0.119-0.153 0.128 0. 102-0. 153 
Funicular segment 3 length 0. 068 0.070 0. 051-0. 085 
Biotocy: The following host-plant records were taken from the 
material examined: “Rudbeckia amplezxicaulis,’”’ Victoria, Tex., Apr. 
11-29 (USNM); “Rudbeckia amplexicaulis,” Dallas, Tex., May 7; 
“on nigger heads,” Victoria, Tex., Apr. 23 (USNM); ‘fon Monarda,”’ 
