212 Mr. E. Meyrick's Descriptions of 



HELIODINIDAE. 



Percnarcha, n. g. 



Head smooth; ocelli present; tongue developed. Antennae |^, 

 stout, scaled, in (^ moderately strongly ciliated, in $ fringed with 

 rough projecting scales above, basal joint moderate, without pecten. 

 Labial palpi very long, recurved, with appressed scales, terminal 

 joint longer than second, acute. Maxillary palpi obsolete. Posterior 

 tibiae smooth-scaled, with whorls of expanded bristly scales at 

 origin of spurs, spurs roughened with scales above, tarsi thickened 

 with scales, with short bristles at apex of joints. Forewings with 2 

 from towards angle, 3 and 4 approximated from angle, 7 and 8 

 stalked, 7 to costa, 11 from middle. Hindwings 1, elongate- 

 trapezoidal, somewhat dilated posterior^, apex obtuse, termen 

 rounded, cilia 4 ; 3 and 4 connate, 5 somewhat approximated, 6 and 

 7 approximated towards base. 



Type trabeata, Meyr., from Bolivia, wrongly attributed 

 to Tinaegeria, which belongs to the Sesiadae. 



Percnarcha rhodosoma, n. sp. 



$. 23 mm. Head, palpi, antennae, and thorax deep glossy 

 indigo-purple-blue, antennae with rough scales longest between 

 middle and |, apical fourth simple, white. Abdomen rosy-crimson, 

 two basal segments, apical, and most of praeapical deep indigo- 

 purple, ventral surface of two basal segments blotched with pale 

 ochreous. Posterior tibiae red, basal and apical bands and tarsi 

 deep indigo-blue, tarsi fringed above mth rough projecting scales. 

 Forewings elongate, very narrow anteriorly, moderately dilated 

 posteriorly, costa somewhat sinuate, posteriorly gently arched, 

 apex obtuse-pointed, termen very obliquely rounded ; deep glossy 

 indigo-bluish-purple; subniedian fold and dorsum suffused with 

 fuscous anteriorly : cilia dark purplish-grey. Hindwdngs pale 

 whitish-ochreous, with a hyaline patch extending along termen 

 from base to about vein 4, and a dark purple-grey patch occupying 

 apical fourth, and sending a streak inwards in middle to cell ; veins 

 2-4, and terminal edge from near base to apical patch dark fuscous : 

 cilia dark grej', becoming whitish-ochreous towards dorsum. 



British Guiana, Bartica, in February (Parish) ; one 

 specimen. 



Heliodines choneuta, n. sp. 



(J $. 8-10 mm. Head, palpi, and thorax dark shining bronzy- 

 grey. Abdomen dark grey. Forewings lanceolate, apex somewhat 



