CICADELLINAE: PART 2. NEW WORLD CICADELLINI 249 
2. Antennal ledges convex in anterolateral view; median coronal depression 
iemmenarethicrlateral’ Ones’: ....\c ere hee ere ee te sie stygiana, n. sp. 
Antennal ledges concave in anterolateral view; median coronal depres- 
sion not longer than lateral ones ............... russeola, n. sp., page 251 
Chichahua stygiana, NEW SPECIES 
FicurE 203 
Length of male 10.1-10.4 mm. Head moderately produced, median length 
of crown slightly greater than one-half interocular width and approximately 
one-third transocular width, without a carina at transition from crown to face; 
crown with median concavity extending from near posterior margin of head 
almost to apex; clypeus with muscle impressions distinct, clypellus strongly 
convex in lateral view. Pronotum with width equal to transocular width of 
head, lateral margins convergent anteriorly, surface with deep impressions ad- 
joining anterior margin behind each eye and lateral margin behind each eye, 
disk transversely rugose; forewing without a membrane, appendix present, all 
veins elevated and distinct, entire wing with a plexus of veins; hindleg with 
length of first tarsomere equal to combined length of two more distal tar- 
someres, setae of plantar surface in more than two rows. Male pygofer and 
plates with microsetae only; style extending posteriorly much beyond apex of 
connective, apex slightly hooked; connective short Y-shaped; aedeagus with 
dorsoapical lobe not widely separated from shaft, anteapical processes short, 
spinelike, in an arcuate pattern; paraphyses short-stalked, the rami convergent 
apically, each with a short anteapical process. Female unknown. 
Color of dorsum including forewings, black; face, all femora, tibiae, and 
tarsi, castaneous, bases of legs yellow. 
Holotype and one additional male, Mt. Tungurahua, Ecuador, 2800 (holo- 
type) and 2500 meters, April 6, 1939 (holotype) and June 15, 1937 (W. Clark- 
Macintyre) (NCS). Holotype on indefinite loan to USNM. 
C. stygiana, n. sp., is closer to C. impressa, n. sp., than to C. russeola, n. sp., in 
external characters. It may be separated from both of the last by the nearly 
full-length median depression on the crown. 
Chichahua impressa, NEW SPECIES 
Figure 202 
Length of male 8.8 mm. Head more strongly produced than in other species 
of the genus, median length of crown approximately seven-tenths interocular 
width and one-half transocular width, with a carina in median portion of 
transition from crown to face; crown with a Y-shaped median elevation 
separating the three concavities of which the median one extends over only 
slightly more than half length of crown; clypeus with muscle impressions dis- 
tinct, clypellus weakly convex in lateral view. Pronotum with width greater 
than transocular width of head, lateral margins convergent anteriorly, surface 
