GEOMETRlDiE. PHIBALAPTEUYX. 255 



wardly; beyond this is generally a clear space or fascia, sometimes very 

 distinct, conspicuous, and whitish, but this is also occasionally broken into 

 large spots placed transversely; the hinder margin is strigulated and varied 

 with black or fuscous, and has very frequently a white spot towards the 

 middle, and an oblique black line at the apex; the extreme edge of the margin 

 has generally a row of black spots; cilia clouded with fuscous at the base: 

 posterior wings ashy-brown, sometimes with waved strigse. 

 Extremely variable both in colour and tint, scarcely two examples occurring 

 alike in every respect. I possess an extensive series from Cumberland, which 

 certainly have the habit of a distinct species ; they vary exceedingly from 

 each other, more, if possible, than in the type : one is entirely fuscous, with 

 some faint virescent striga; ; a second remarkable one is whitish -green, thickly 

 varied with interrupted fuscous strigae and spots, with an undulated rufescent 

 line on the hinder margin ; a third is virescent thickly irrorated throughout 

 with minute fuscous dots, and with a single obscure fascia towards the base ; 

 —these varieties I considered as identical with the Ge. horridaria of Haworth's 

 Prodomus. 



A very abundant species throughout the south of Britain, and 

 apparently not uncommon in the north. " Great and Little Orton." 

 —T. a Heyshavi, Esq. " Raehllls."— i?<?t'. W. Little. " Strand- 

 on-the-green."— /^et). A. H. Matthews. " Tynemouth."— G. Wailes, 

 Esq. 



Genus CCXIII. — Phibalapteryx * mihi. 



Palpi short, approximating, projecting beyond the forehead, subclavate, obtuse, 

 triarticulate, the two basal joints of equal length, the first curved, the second 

 slightly attenuated and a trifle more slender, terminal elongate-ovate, acute: 

 viaxillw long. Antennas robust in the males, subserrated and pubescent within, 

 simple and slender in the females: head rather \iXoa.A, forehead densely squa- 

 mous : eyes globose : thorax slender : wings entire, placed in a triangle during 

 repose j anterior rather narrow elongate sublanceolate, with obUque imperfect 

 strig£, sometimes condensed into an insolid central fascia ; posterior ovate- 

 triangular, with transverse strigse : abdomen moderate, slender, carinated down 

 the hick, the apex of the male with a short broad tuft, of the female obtuse. 

 Larva with ten legs, not tuberculated, with pale longitudinal lines : pupa 

 subterranean. 

 There is almost too great a disparity among the few insects here 



associated to warrant their being included in one genus ; but at 



■I'ipaXo;, gracilis ; IIti^ov, ala. 



