1945] Notes on Neotropical Plebejinoe 11 
Pseudothecla n.g. 
(figs. FAG, pi. 2) 
Type and only known species: Thecla faga Dognin 1895, 
Ann. Soc. ent. Belgique 39: 105-106 “Loja, Ecuador” (= ? 
excisicosta Dyar 1913, Proc. United States Natnl. Mus. 45: 
637-638 “Cotahuasi; Chuquibamba, Peru”). 1 
One male investigated: prep. 611, “Peru,” ex coll. Hunting- 
ton, Am. Mus. Nat. Hist, (with a somewhat more weakly 
marked underside than Dognin’s description suggests). 
HCdeagus two-thirds of a millimeter in length, very slightly 
incurved distally, rather thickset, not unlike certain Plebejus 
species in type, the suprazonal portion hardly more than half 
the subzonal one in length, the vesical opening at 0,8 mm. from 
the zone, the vesica plain, rather weakly defined, thickly 
shielded ventrally by the suprazonal sheath; alulae and tabs 
small. Furca resembling Parachilades , the branches still 
thicker, conspicuously curved, equal in length to the subzonal 
portion of the aedeagus. Traces of a thin membrane (? rudi- 
ments of sagum) between the latter and the furca. Falx bear- 
ing a general resemblance to certain Plebejus and Vacciniina 
species, its outline, however, more evenly rounded throughout. 
Forearm slim, incurved, tapering to a sharp point, subequal to 
the suprazonal portion of the aedeagus, humerulus thickish with 
a weak shoulder. Uncus lobe small, shorter than the forearm, 
rather narrow and blunt. Valve of the normal (fishlike) sub- 
familial shape, but exceedingly small, subequal in length to the 
aedeagus, about twice as long as broad, nicely tapering basad. 
Processus superior strongly scooped out at the rostellum which 
thus seems to be produced from a point lower than the upper 
margin of the valve and is curiously shaped: anteriorly forming 
a sharp point, posteriorly producing a kind of small heel at 
about half of the length of its inner margin. 
Measurements (in mm.): aedeagus 0.67, suprazonal portion 
0.24, subzonal 0.43 with breadth (lateral view) 0.11; penis 
0.64. Furca 0.44. Vertical/Horizontal extension of uncus: fore- 
arm 0.27/0.033, humerulus 0.07/0.14, shoulder 0.11/0.05, lobe 
0.2/0.06. Valve 0.65 (to tip of rostellum 0.76) with breadth 
0.31. 
This is a very curious addition to the subfamily. 
1 Sylphis Draudt 1921 (in Seitz, Macrolep. World 5: 823, “Cuzco (Peru),” pi. 
