PLEUROTA. 
apex; the first branch of the median vein is slightly curved ; the sub- 
median is remote from the median; the subdorsal vein is furcate. 
This genus has only one representative in this country, which 
. is found commonly on heaths in June and July. Nothing is 
known of its primary states. 
. 
1. bicostella, Linn. F. S. 1438 (1761); Scop.; Hiib. Tin. 115 ; 
Haw. ; Treit.; Dup.; Step.; Curt.—marginella, Wab.—viduella, Scop.? 
Alis anticis albis, griseo-fusco valde suffusis, praecipue dorsum versus, 
stria (juxta costam albam non suffusam) a basi usque ad apicem 
fusea, punctis duobus disci, uno ante, altero pone medium nigris. Exp. 
al. 10-11 lin. 
Head and face white, mixed with grey. Palpi greyish-white; ter- 
minal joint white, with the base and apex grey. Antenne dark fus- 
cous. Anterior wings white, much dusted with greyish-fuscous, espe- 
cially towards the inner margin; the costa alone remaining narrowly 
pure white; immediately below it is a fuscous streak from the base to 
the apex; beneath it are two black spots on the dise, one before and 
| the other beyond the middle; under the first is a small dark fuscous 
spot on the fold, and under the second a fuscous cloud; the hinder 
margin is spotted with dark fuscous; cilia greyish-white. Posterior 
. wings pale greyish-fuscous, with paler cilia. 
Common throughout the country on heaths, from the end of 
May to the middle of July. 
———— | 
—— 
Genus XVIII. HARPELLA. 
Harrewa, Schr. F. B. ii. 168 (1802); Zell. dlabonia, Step. Bni- 
costoma, Dup. Alabonia p., Hib. Recurvaria p., Waw. Adela p., 
Treit. 
Capilli depressi, postice suberecti; frons lata. Ocelli nulli. Antenne 
tenues, corpore non breviores, ¢ ciliate. Palpi labiales longi com- 
pressi, articulo secundo parum curyato, pilis appressis, tertio tenui 
adscendente acuto. Taustellum breve, squamatum. Ale anteriores 
oblong, posteriores oblongo-ovate mediocriter ciliate ; anteriores : 
ven apicalis ramus inferior in apicem exit; cellula secundaria nulla; 
vena subdorsalis furcata; submediana a mediana distat, in apice in- 
crassatur. 
Head smooth, with the scales behind slightly erect; forehead broad. 
Ocelli none. Antenne slender, not shorter than the body; in the ¢ 
ciliated. Labial palpi Zong, compressed ; the second joint slightly curved 
with appressed scales; the third joint slender, ascending, pointed. 
Tongue short, clothed with scales. Anterior wings oblong; posterior 
wings oblong-ovate, with moderately long cilia. In the anterior wings 
the lower branch of the apical vein terminates in the apex (in some of 
