1945] 
29 
Notes on Neotropical Plebejinoe 
and thus of a very holarctic aspect. Sagum hugely developed, 
consisting of two convex lobes, in ventral view resembling the 
parietal bones of a skull; about twice as long as broad, only 
slightly shorter than the prongs of the flexible furca embracing 
them: thus twice longer than the subzonal portion of the aede- 
agus which they envelop from the zone down, their strongly 
serrated edges meeting in front (e.g. ventrally) of the aedeagus 
and of an imaginary line prolonging it proximad ; these teeth of 
uneven length but on the whole increasing in size proximad; 
up to 45 teeth along each margin, the first three or four (at the 
most distal point where the edges begin to meet) about 0.012 
long, then ranging (in the same specimen) from 0.02 to 0.04 
(and to 0.055 in some specimens) in an unequal sequence; 
finally reaching 0.1 at the proximal ends of the parting margins 
where they become clawlike, with clusters of additional spines 
on the praemarginal surface of the lobes. Shoulder of falx al- 
most as high as the forearm which is about one third of the 
aedeagus. Valve twice longer than the aedeagus and more than 
three times as long as broad itself with a long tapering tail, a 
rather week hump, a small mentum and a curved rather than 
bent, thickish, gradually tapering rostellum about 0,2 long. 
Female: henia beautifully developed with its distal half 
(about 0,6) strongly plated; fibula engulfed as it were in this 
chitinisation. 
Measurements (in mm.): aedeagus 0.6-0. 7 (mean 0.69), su- 
prazonal portion 0.15-0.2 (mean 0.18), subzonal 0.45-0.52 
(mean 0.49) with breadth (in lateral view) 0.08-0.09; penis 
mean 0.62. Furca mean 0.9. Sagum 0.85-0.96 (mean 0.93) 
with breadth 0.41-0.44 (mean 0.42). Vertical/Horizontal ex- 
tension of uncus: forearm 0.2/0.03-0.22/0.035, humerulus 
0.055/0.13-0.065/0.14, shoulder 0.18/0.05; lobe 0.25/0.08. 
Valve 1.28-1.31, with breadth 0.33-0.39. 
Echinargus n.sp. 
(figs, n.sp, pi. 5, 7, 8) 
Two males and one female investigated: prep. 578, “Port of 
Spain, Trinidad, XII-1912-V-1913, leg. R. Thaxter,” Mus. 
Comp. Zool.; female, prep. 597 id.; prep. 614, “Chancellor Rd., 
Port of Spain, Trinidad, 2 1—3 1— III— 1929, leg. E. I. Hunting- 
ton,” ex coll. Amer. Mus. Nat. Hist., Mus. Comp. Zool. 
iEdeagus just over half a mm. in length, the suprazonal por- 
