278 PROCEEDINGS OF THE NATIONAL MUSEUM Vou. 113 
ruginous to piceous, the third segment much broader than first two 
segments; claws small, connate for almost half their length, slightly 
divergent. Stem of spiculum ventrale of female genitalia only 
slightly expanded at the anterior end (fig. 125). 
MerasurEMENts: The following measurements were taken from the 
type specimen (a male), 2 females and 1 male from Victoria, Texas 
(USNM), and 1 male from Cotulla, Texas (USNM). The antennae 
of the type were badly obscured by a sticky residue and therefore 
were not measured. All measurements are in millimeters: 
Males Females 
Mean Extremes Mean Extremes 
Body length 2. 50 2. 20-2. 70 2. 70 2. 50-2. 90 
Elytra length 1. 60 1. 40-1. 80 1. 75 1. 60-1. 90 
Elytra width at base 111 1. 03-1. 20 1; 25 1. 10-1. 40 
Prothorax length 0. 68 0. 66-0. 70 0. 72 0. 65-0. 80 
Prothorax width 0. 80 0. 73-0. 85 0. 85 0. 80-0. 90 
Rostrum length 0. 93 0. 89-1. 00 1. 20 1. 10-1. 40 
Rostrum length before antennal 0. 27 0. 26-0. 30 0. 47 0. 45-0. 50 
insertion 
Funicular segment 2 length 0.102 0.085-0.119 0.102 
Funicular segment 3 length 0.068 0.051-0.085 0.068 
Brotocy: The following host-plant records were taken from the 
material examined: ‘on Rudbeckia,” Victoria, Tex., May 10 (USNM); 
‘“‘Rudbeckia amplexicaulis,” Victoria, Tex., March 23 and 29 (USNM); 
“Kx Rudbeckia,’’ Columbus, Tex., March 10 (ELS). 
Discussion: Although Dietz (1894) described this species from 
“five specimens in Dr. Horn’s collection,” only the lectotype and seven 
specimens from Texas have been examined by the writer. Material 
collected in the future may indicate that S. triangularis is only a form 
of S. lineolatus Casey, but the material examined can be separated 
from S. lineolatus by the characteristics already mentioned in the 
discussion of S. lineolatus. It should also be noted that the anterior 
end of the stem of of the spiculum ventrale of the female genitalia is 
more expanded in S. lineolatus than in S. triangularis (compare 
figs. 124-125). 
Disrrisution: The locality records of the material examined in- 
dicate that this species may be found in Texas on the Gulf coastal 
plain. The following specimens were examined: 
TEXAS: COLORADO Co.: Columbus, March 10 (ELS). La SALLE co.: Cotulla, 
Apr. 15 (USNM). vicrorra co.: Victoria, Apr. 23 and 29, May 10 (USNM). 
“Tex.,”? Apr. 20 (B.D. Valentine). 
Total specimens examined: 7. 
