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Show 88 LORD WALSINGHAM ON N E W TINEID^. [Feb. 17, pale ochreous. Abdomen bright orange-ochreous, except at the extreme base, which is blackish. First and second pair of legs, together with the underside of the wings, dark smoky grey ; the first pair with indistinct pale spots at the joints ; third pair bright orange-ochreous; the tarsi with blackish annulations. Expanse 25 millims. cS. Taken on the Siskiyou range of mountains on the borders of California and Oregon, June 10th, 1872. Allied to the European Psecadia chrysopyya (Zell.), and approaching in appearance Anesychia cirrhocnemia, Led.,Horae Ent. Soc. Ross. viii. p. 25, pl. ii. fig. 8. PSECADIA ARCTOSTAPHYLELLA, sp. nov. (Plate XII. fig. 4.) Capite subcceruleo-albo, antennis, except a basi supra albida, fuscis thorace sexpunctato; alis anticis subcczruleo-albis, minus apud costam, prcecipue apud cellulam squamis fumosis adumbratis ; punctis marginalibus nigrescentibus undecim; posticis subflave-scenti- griseis ; abdomine ochraceo, tibiis posticis ochraceis, tarsis nigro annulatis. Head bluish white ; antennae fuscous, with some white scales above at the base ; palpi bluish white, shaded on their outer sides with blackish scales. Thorax bluish white, with six black spots, three on each side, and a few black scales forming an indistinct spot at the back of the head. Fore wings bluish white ; the costal half is much occupied by smoky blackish scales, which form a strong shade along the middle of the wing from the base to the end of the cell, and a slight shade projecting downwards beyond it ; the dorsal half is of the plain bluish wbite ground-colour, into which the median shade gives out a slight projection about the middle of the wing, and a small semi-detached spot pointing inwards nearer to the base; along the apical margin are ranged eight or nine blackish spots, with two or three more indistinct ones along the costa near the apex; cilia greyish. Hind wings grey with a slight yellowish tinge; cilia yellowish, especially at the abdominal margin. Abdomen yellow, shaded with greyish at the base. First and second pairs of legs blackish, the tarsi with white annulations; third pair of legs yellow, the tarsi with blackish annulations. Expanse 22 millims. This species is nearly allied to P. bipunctella (Fab.), but it differs in the bluish white, not pure white, ground-colour of the fore wings, and in the less intense black and somewhat different form of their shaded portion, which is much paler towards the costa than in that species, differing also in this respect from Anesychia hagenella (Cham.), as well as in its larger size. I met with the species above described in Mendocino and Lake counties, California, in the middle of June 1871, and bred one specimen on the 18th of June from a pupa found near San Francisco on the 20th of May, in a a delicate cocoon in a leaf of Manzanita (Arctostaphylos glauca, Lindl.), which the imago frequents. |