14 U.S. NATIONAL MUSEUM BULLETIN 289 



pronounced tuft of raised scales above; apical segment short, usually- 

 conical in male and with oblique apex, more cyclindrical and obtuse 

 in female. 



Thorax: Wings (figs. 27-33) relatively broad; termen somewhat 

 truncate, not strongly oblique. Forewings either with all veins arising 

 separate from discal cell or with one or two pairs stalked ; origin of 11 

 and 10 variable according to subgenus; 2 strongly curved, arising from 

 lower angle of cell very near 3. Hindwings with discal cell extending 

 half way to termen or less, veins 5 and 6 absent; the latter sometimes 

 represented by a faint vestige; 3 and 4 normally connate, occasionally- 

 separate in C. dominicae, sometimes stalked for short distance of less 

 than one-sixth the length of 3. Cubital pecten present. Marginal fringe 

 of both wings relatively short. 



Male genitalia. — Uncus greatly reduced. Tegumen relatively- 

 broad, with a dense row of elongate setae usually arising from area at 

 base of vestigial uncus. Gnathos prominent, widely separated, and 

 setose; setae usually projecting in a cluster beyond apex of gnathos. 

 Transtilla weakly developed, narrow, with a pair of slender digitate 

 processes arising from area adjoining valvae. Valvae typically divided 

 into two distinct halves; basal half (sacculus) expanded and often 

 bearing a prominent ampulla; distal half (cucullus) accuminate, 

 heavily setose on inner face. Juxta usually shield-shaped, sometimes 

 strongly furcate. Vinculum weak, reduced to a narrow ring ventrally; 

 saccus usually distinct but reduced in size. Aedeagus with apical half 

 expanded and basal half slender, rodlike; cornuti numerous, usually 

 arranged in two or more dense patches; juncture of ejaculatory duct 

 near middle, at base of expanded portion. Spermatophore with apical 

 end membranous and greatly dilated; usually with a slender, twisted 

 terminal strand of tissue extending from apex of inflated portion. 



Female genitalia. — Ovipositor varying in length, either elongate 

 or relatively short; posterior apophyses varying from 1.25-2.5 X length 

 of anterior pair. Sinus vaginalis broad, expanded. Caudal portion 

 of ductus bursae (antrum) greatly expanded, walls thickened, usually 

 reticulate or papillose; remainder of ductus bursae usually con- 

 stricted, walls partly membranous, partly thickened. Corpus bursae 

 usually abruptly expanded, ovoid, membranous, typically with a 

 pair of prominent, strongly furcate signa; arms of signa slightly 

 curved as viewed laterally, inner edge of arms serrate, outer edge 

 smooth. Origin of ductus seminalis usually at caudal end of ductus 

 bursae near termination of antrum, sometimes at middle. 



Discussion. — At present it is difficult to define this genus in the 

 New World because of insufficient comparative data and a general 

 lack of material, particularly in the case of those species that are 

 known only from one sex. Considerable diversity exist with regard to 



