248 N. C. AGR. EXP. STA. BUL. 239 
distinct or not, clypellus moderately to strongly convex in lateral view, con- 
tour of its lower portion more nearly horizontal than profile of clypeus, with a 
few setae near apex. 
Pronotum with width variable interspecifically in relation to transocular 
width of head, lateral margins parallel or convergent anteriorly, dorsopleural 
carinae complete, posterior margin concave, surface with large impressions 
variable interspecifically in location, disk with or without transverse rugae, 
without pubescence; scutellum with posterior portion elevated and transverse- 
ly rugose. Forewing with or without apical membrane, with or without an ap- 
pendix, at least some of the veins conspicuously elevated, apical cells very 
short and variable, with at least an anteapical plexus of veins, texture 
coriaceous; wings of female (known only in C. russeola, n. sp.) exceeding apex 
of ovipositor. Hindleg at rest with knee not attaining posterior proepimeral 
margin (exception: C. impressa, n. sp.), femoral setal formula 2:0:0, first tar- 
somere with length variable in relation to combined length of two more distal 
tarsomeres and with setae of plantar surface irregular or in two parallel rows 
(varying interspecifically). 
Male pygofer moderately produced with posterior margin broadly convex, 
setae variable in size, occurring on posterior two-thirds of disk, pygofer pro- 
cesses absent. Plates short, triangular, not extending posteriorly as far as 
pygofer apex, setae multiseriate, variable in size. Style varying interspecifical- 
ly in length, apex hooked or broadly truncate. Connective short Y-shaped or 
platelike. Aedeagus curved posterodorsad, with a dorsoapical lobe and one or 
more ventral anteapical spinelike processes. Paraphyses present and almost 
symmetrical, or absent. 
Female (based on russeola) abdominal sternum VII with posterior margin 
slightly convex, almost regular, but slightly biundulate medially. Ovipositor 
with second valvulae broadened and bearing dorsal teeth beyond basal cur- 
vature, the primaries very broad and bearing a number of secondary denticles, 
with a large number of very small denticles anteapically on posterodorsal and 
posteroventral margins. Pygofer with numerous small macrosetae in an in- 
terrupted submarginal group near posterodorsal and posteroventral margin. 
Chichahua is known only from Colombia and Ecuador, and from a very 
small number of specimens. The female genitalia suggest a close relationship 
with Caragonalia, new genus. The concave clypeus, the plexus of veins in the 
forewing and the hind femoral setal formula of Chichahua will serve to separate 
the genera readily. Chichahua is also similar to Orechona Melichar in the treat- 
ment of which the relationship is discussed. 
SPECIES OF CHICHAHUA 
impressa, n. sp. Ecuador. 
russeola, n. sp. Colombia, Ecuador. 
stygiana, n. sp. Ecuador. 
KEY TO SPECIES OF CHICHAHUA 
1. Crown with a median Y-shaped elevation delimiting the broad shallow 
IMPTFESSIONS ©... wiuhdegaae wae see cas Medan te ane impressa, N. Sp. 
Crown without such an elevation 
