XYLORYCTID.-R, 419 



hairpencil from lower margin of cell near base Ij'ing alongside sub- 

 dorsal fold; cilia white, round apex with fuscous subbasal line. 

 Hindwings in J beneath \\ith stiff ridge of raised wLitisb scales 

 along vein 1 b. 



Bkitish Guiana, Bartica, in January (Parish); three specimens. 



SteTioma moncsaris, n. sp. 



d" 2 . 15 mm. Head white, crown more or less fuscous 

 posteriorly. Pali)i white, second joint with dark fuscous streak 

 on basal |, terminal joint with base and a supramedian band dark 

 fuscous. Antennal ciliatioiis of ^ 2|. Thorax rather dark fuscoue, 

 shoulders suffused with white. Abdomen ochreout-whitish, Fore- 

 wings elongate, rather narrow, costa anteriorly gently arched, then 

 nearly straight, apex rounded, termen rounded, little oblicjue ; 

 2 anastomosing wiih Ic; white, in $ slightly spriidded with dark 

 fuscous ; dorsal half dark fuscous throughout, slightly wider on 

 posterior third, not quite reaching termen at upper edge ; a dark 

 fuscous line from base of costa, not quite reaching a daik fuscous 

 longitudinal mark in disc at-L; very oblique rather dark fuscous 

 linos from just beneath costa at l and f, variable in development 

 and first sometimes little marked, but neither reacliing dark dorsal 

 area ; an almost straight dark fuscous line from | of costa to 

 extremity of dark fuscous area ; seven large blackish marginal dots 

 round apex and termen, those at apex in 5 preceded by some dark 

 fuscous suffusion : cilia white, with fuscous subbasal line. Hind- 

 wings with .^ and 4 coincident, 5 nearly approximated ; in cJ 

 whitish, sometimes variably suffused with pale greyish posteriorly 

 except at apex, in 2 P^le grey ; apical margin marked with dark 

 fuscous on each side of apex ; in J a long- whitish hairpencil 

 enclosed in a subdorsal fold; cilia white, basally yellowish-tinged, 

 with fiiscous subbasal line round apex. Hindwings in c? beneath 

 with strong ridge of raised white scales along vein 1 b. 



Britisu Guiana, Bartica and Mallali, from January to March 

 (Parish); seven specimens. 



Sterioma thylacosaris, n. sp. 



(S . 17-21 mm. Head brownish, face ochreous-white. Palpi 

 o^hreous-white, second joint with dark fuscous streak on basal f, 

 terminal joint with base and some suffusion anteriorly above middle 

 fuscous, Antennal ciliations of d -• Thorax fuscous, shoulders 

 ochreous-whitish. Abdomen ochreous-whitish. Forewings elon- 

 gate, costa anteriorly moderately, posteriori}' slightly arched, apex 

 rounded, termen rounded, neurl}' vertical ; 2 anastomosing or 

 closely approximated with 1 c ; whitish-fuscous, extreme costal 

 edge white, dorsal | uneveul}' suffused with brownish ; a slender 

 dark fuscous longitudinal streak from base of costa to \ of disc ; 

 three dark fuscous transverse lines from beneath costal edge, first 

 from \ of costa to before middle of dorsum, interrupted above and 

 below an oval spot in disc, becoming a broad suffusion in dorsal 



2e2 



