32 U.S. NATIONAL MUSEUM BULLETIN 2 89 



and broader (i.e., reticulate) toward lower end. Corpus bursae abruptly 

 enlarged; rami of signa relatively long and slender. 



Type.— Lectotype, 9 designated by Clarke (1963), in the British 

 Museum (Natural History) . 



Type-locality. — Bartica, Guyana. 



Distribution (map 4). — Known only from the type-locality which 

 is located in the Guiana Coastal Plain. 



Discussion. — Superficially this subgenus and species closely 

 resemble the members of the typical subgenus, particularly in the 

 general structure of the female genitalia. The palpus of the lectotype 

 as figured by Clarke and of the paralectotype examined by me both 

 show less scaling along the dorsum of the second palpal segment; 

 however, this condition is probably due to the rather poor preservation 

 of these two specimens. The diagnostic feature of the subgenus as well 

 as the species is the stalkmg of veins 7 and 8 m the primaries; Trepsitypa 

 being the only carposinid possessmg this character. 



Material examined. — One female. 



SOUTH AMERICA: Guyana: Bartica, 1 9, 12.12 [December], paralecto- 

 type, coll. Parish (USNM). 



Subgenus Dipremna, new subgenus 



Type-species. — Carposina cretata, new species. 



Adult. — Forewings (fig. 30) with vein 10 arising from discal cell 

 slightly closer to 11 than to 9; 8 and 9 stalked less than one-third 

 their length; 3 and 4 stalked approximately one-third their length. 

 Hindwings with 6 completely absent; discal cell relatively shortened, 

 less than half the length of wing; 2 arising from outer third of cell. 



Male genitalia. — Uncus present but reduced. Tegumen relatively 

 broad ; lateral margins with a prominent, elongate and widely divided 

 gnathos. Transtilla weak, with a pair of digitate processes arising 

 near lateral ends. Valvae variously lobed, broad at base, narrowing 

 abruptly to apex; ampulla reduced, arising from base of costa. Vmcu- 

 lum rather weak, expanding ventrally to form distinct saccus. Juxta 

 prominent, furcate. Aedeagus with apical half expanded, cornuti 

 numerous and arranged in two dense clusters; inception of ejaculatory 

 duct just below middle. 



Discussion. — This taxon can be easily separated from the other 

 subgenera of Carposina by the two sets of stalked veins, 3+4 and 

 8-f 9, in the primaries; hence the name Dipremna (double-stalk). 

 The male genitalia of C. cretata is structurally very close to that ob- 

 served in the species of the typical subgenus, particularly in the 

 form of the juxta and gnathos. 



