PLUTELLIDiE. 
479 
some fuscous suffusion on termen between these : cilia grey, towards 
tornus whitish. Hindwings grey, varying in depth; cilia whitish- 
yellowish to grey. Posterior tibiae (both sexes) with triangular 
tuft of hairscales beneath on apical half (as in lyrodci). 
Pertj, Bio Napo and Jurimaguas, March, May; Brazil, Teffe, 
January ( Parish ); 4 ex. On the structural differences in fore¬ 
wings and posterior tibiae psaltrici would be the most primitive 
species of the five known, and lyroda the most specialised. 
Orthiostola tympanista, n. sp. 
d . 9 mm. (Head missing.) Thorax white. Forewings elon¬ 
gate, somewhat dilated, costa arched posteriorly, apex obtuse, 
termen obliquely rounded : shining white ; an oblique pale ochreous 
striga from costa about middle, and two parallel approximated 
sinuate grey lines from dorsum beyond middle reaching more than 
half across wing and touching its apex; two rather excurved 
approximated pale ochreous lines crossing wing about | ; apical 
area beyond these golden-ochreous, mostly suffused dark fuscous 
except towards termen, on costa with two blackish spots, along 
termen with a leaden-grey oval spot partly edged blackish : cilia 
grey. Hindwings dark fuscous ; cilia grey. 
Brazil, Teffe, January ( Parish ) ; 1 ex. 
Orthiostola citliaroeda, n. sp. 
d . 10-11 mm. Head, thorax ochreous-white. Palpi white. 
Forewings elongate, rather narrow, slightly dilated, apex obtuse- 
pointed, termen slightly sinuate, oblique ; white ; three fine grey 
transverse lines rising from oblique brassy costal strigulge, first 
median, abruptly curved or angulated, reaching fold, second at |, 
gently curved, not reaching much below middle, third near beyond 
this, less curved, slightly longer; a fine straight transverse brassy 
line at | ; apical area suffused brassy-yellow, finely striolated 
greyish, a white inwards-oblique strigula from costa above apex, 
a blackish dot near before apex, sometimes two small dark fuscous 
dots towards termen beneath this : cilia white, basal half yellow 
except towards tornus. Hindwings and cilia whitish. Posterior 
tibiae without tuft beneath. 
Brazil, Obidos and Parintins, August to October; Peru, Juri¬ 
maguas, March ( Parish ) ; 4 ex. 
Orthiostola psaltria, n. sp. 
d . 11 mm. Head, thorax shining white. Palpi white. Fore¬ 
wings elongate, rather narrow, slightly dilated, apex obtuse, 
termen straight, somewhat oblique; shining white, with faint 
yellowish tinge; fine straight whitish-ochreous entire transverse 
lines at middle and |, second edged dark grey posteriorly towards 
costa, two grey specks with some faint whitish-ochreous suffusion 
in disc between these ; a fine whitish-ochreous suffusion round 
apical margin, partially edged anteriorly with some dark fuscous 
scales, a minute dark fuscous dot in this just before apex : cilia 
