252 N. C. AGR. EXP. STA. BUL. 239 
of veins at least in corium before apex; first hind tarsomere shorter than com- 
bined length of two more distal tarsomeres and with setae of plantar surface 
irregularly arranged. Male unknown. Female genitalia as in generic descrip- 
tion. 
Crown, pronotum, and scutellum black, crown with a quadrate pale mark 
at base bordering inner eye margin; forewing with inner portion of clavus 
pale, portion bordering claval suture and all of corium dark red except narrow 
costal black border and black apex; face black except narrow yellow line (in- 
terrupted in some specimens) on genae bordering lateral clypeal sutures; pro- 
pleura and legs black. 
Holotype female, Pasto, Narifio, Colombia, November 9, 1956 (M. Revelo), 
on potatoes (USNM). One female, Quito, Ecuador, December, 1951 
(Nanndorf) (SSM). One female, Chillacocha, Ecuador (3900 m.), 1905 (P. 
Rivet) (MHNP). One female Ambato, Prov. Tungurahua, November, 1956 
(NCS). 
C. russeola, n. sp., differs from the other species in the genus in its shorter 
head, narrower pronotum with its parallel lateral margins, and the red mark- 
ings of the wings. 
34. GENUS ORECHONA MELICHAR 
Ficures 205, 206 
Orechona Melichar, 1926a:345. Type-species: O. trifoveolata Melichar, by original 
designation. 
Length of female 11.2-12.0 mm. 
Head slightly produced, anterolateral margins broadly convex, apical 
margin truncate in dorsal view, median length of crown more than four-tenths 
interocular width, without a carina at transition from crown to face, ocelli 
located on a line between anterior eye angles, each equidistant from adjacent 
anterior eye angle and median line of crown, crown with a median concavity 
between ocelli and a concavity on each side between ocellus and eye, surface 
without sculpturing or setae, lateral clypeal sutures extending onto crown and 
attaining ocelli; antennal ledges not protuberant, in lateral view with their an- 
terior margins oblique and convex; clypeus convex, flattened medially, muscle 
impressions distinct, transclypeal suture obsolete medially, clypellus with con- 
tour of its lower portion more nearly horizontal than profile of remainder of 
face. 
Thorax with pronotal width greater than transocular width of crown, 
lateral margins concave in dorsal view and strongly convergent anteriorly, 
dorsopleural carinae not attaining eye margin, disk without sculpturing, not 
pubescent; scutellum with portion behind transverse sulcus convex but 
without sculpturing. Forewing with inner two apical cells membranous, veins 
not elevated, not distinct, with three anteapical cells of which the bases are 
proximal to a transverse line through claval apex, with four apical cells and 
base of outermost more proximal than base of third; forewings of female in 
rest position exceeding apex of ovipositor. Hindleg with femoral setal formula 
