1945 ] 
41 
Notes on Neotropical Plebejinee 
view): forearm 0.34/0.03, humerulus 0.09/0.2, shoulder 
0.17/0.06, lobe 0.44/0.1. Valve 1.35 (to comb 1.55) with 
breadth 0.59; average length of teeth 0.01. 
Itylos ruberrothei Weeks 
(figs. RUB, pi. 6) 
Two males investigated (Mus. Comp. Zool.) : holotype, prep. 
527, “Sicasica, Bolivia, l-X-1899” (left forewing missing), 
and paratype, prep. 486, “Alezum, Bolivia, 8-VIII-1899,” ex 
coll. Weeks. 
Identical in structural shape with moza / differing from it 
only in slightly reduced size (cp. measurements) of aedeagus, 
furca and uncus, and narrower (cp. to length) valve. Valve 
variable in length, reduced in the holotype, but equal to moza 
in the other individual. 
Measurements (in mm.) [when different the holotype is 
quoted first] : aedeagus 0.9, suprazonal portion 0.4; subzonal 0.5 
with breadth in lateral view 0.1, in ventral 0.08; penis 0.8. Furca 
(holotype) 0.7. Vertical /Horizontal extension of uncus: fore- 
arm 0.24/0.03 and 0.29/0.05, humerulus 0.07/0.12 and 
0.07/0.17, shoulder 0.13/0.055 and 0.14/0.05, lobe 0.37/0.8 
and 0.4/0.09. Valve 1.14 (to comb 1.24) and 1.35 (to comb 
1.55) with breadth 0.41 and 0.5. Average length of teeth 0.01. 
Itylos pads Draudt 
(fig. pac, pi. 6) 
One male investigated: prep. 609 “Cuzco, Peru, 3500 m. alt., 
leg. Fassl,” ex coll. W. P. Comstock \ex coll. Staudinger-Bang 
Haas], Am. Mus. Nat. Hist. 
Differing from moza and ruberrothei in the following char- 
acters: somewhat thicker forearm, smaller and shorter valve, 
1 Quite possibly more material would show that ruberrothei is but a form (in- 
dividual, altitudinal, or microlocal) of moza , similar variations in structural size 
occurring in other alpine species (e.g., Agriades glandon) . I have assigned the 
female specimen (described as babhru ) to moza on macroscopical grounds, the 
difference between the two consisting solely in ruberrothei being less robust in 
wing shape and less pigmented than moza (with otherwise identical underside 
markings, the presence of which on the hindwing of ruberrothei may be easily 
discerned by means of lens, but has been overlooked both by the describer and 
artist). Staudinger mentions some very weakly marked specimens in his series 
of moza. 
