398 N. C. AGR. EXP. STA. BUL. 239 
Crown and pronotum with following black markings: a median apical spot, 
an arcuate basal spot arising on basal margin and extending to ocellus on 
each side, a very small marginal spot next inner margin of each eye, on 
crown; a pair of polygonal spots on anterior two-thirds of disk, on pronotum; 
scutellum black with a median orange stripe; forewing with a rounded 
humeral marginal black spot that is narrowed posteriorly and extends a very 
short distance along commissural margin, clavus with an elongate triangular 
black marking bordering and continuous posteriorly with smoky wing mem- 
brane, corium with an elongate black stripe which is gradually broadened in 
its basal two-thirds, gradually narrowed posteriorly and extending to bases of 
apical cells, costal margin narrowly black; face with apical black spot ex- 
tending a short distance onto clypeus. 
Holotype female, Maroni River, French Guiana (Le Moult) on indefinite 
loan to USNM from NCS. One female from near Mazaruni Head, Pakaraima 
Mts., British Guiana, 1932 (J. G. Myers) (BM). 
S. facis, n. sp., is similar to S. flammidulus (Jacobi) in the form of the female 
abdominal sternum VII, but this structure is more elongate, more tapered, 
and with the apical emargination less pronounced in facis. Also, facis can be 
distinguished from flammidulus by its much less extensive black markings on 
the posterior portion of the crown, by the difference in the pronotal black 
markings which do not touch the posterior margin in facis, and by the more 
extensive black markings of the scutellum in facvs. 
aD 
321i 
322p 

& 
321m 
322a 
32la 
322i 
FIGURES 321, 322.—321, Soostulus facts, n. sp., holotype. 322, S. velocissimus 
(Melichar) (p from holotype; a, 1, from ‘“‘Provincia del Sara’’, Bolivia): p, 
Female abdominal sternum VII from ventral view. 
