A REVISION OF THE DELTOID MOTHS SMITH. 85 



which are inserted well toward the tVoiii. 'i'oii,<;ne moderate. I'aljii 

 verj' long; 111 the teinale directed straight forward, the tenniiial Joint 

 set nearly at right angles t(» the second and i>ointiiig ui)ward; very 

 much Ihittened, the upright scales unusually long, and on the terminal 

 joint dilated at tip and almost squarely cut oil". In the male the palpi 

 are shorter, recurved, with a membranous ai)pendage to the third Joint, 

 which extends back to the base of the thorax and contains a jiencil of 

 fine yellow hair, cai)able of fanlike expansion, Antenme long, extend- 

 ing to the outer fourth of the i)riin;uies ; in tlie female siini)le, in the 

 male with lateral bristles, varying in the species. Legs long and stout; 

 middle and hind tibia' with the usual si)uvs; in the male the anterior 

 legs ha\e the tibia extremely short; but with a large and l)r(>a(l outer 

 process, densely clothed inw ardly with long broad scales, and covering 

 a groove on the basal Joint of iarsus in which lies a pencil of line hair 

 which seems not capable of fanlike expansion. The unusually dense 

 mass of long, broad scales gives the process a moplike ap])earance 

 toward the tip. When the process is moved aside from the tarsus it is 

 seen to have a slender membranous extension at the tip, while at the 

 base of the tarsus is a movable fingerlike member, dilated at the tij) 

 and furnished with hooks. I have met with this elsewhere in the 

 present series in only one instance, and have no suggestion to olfer 

 concerning its ])robable use. Primaries narrow, elongate, the costa 

 depressed toward the middle, convex before the apex, which is acute 

 and somewhat prominent. Outer margin somewhat excavated l)elow 

 the apex, obtusely angiilatcd at or above the middle, oblique thence to 

 the inner margin, whicli is about one-third shorter than the costa. In 

 venation it lacks the accessory cell, and veins (!, 7, S, and 10 arise 

 nearly together from the end of the sultcostal, 1) out of 8 before the 

 apex. The body is moderate, the abdomen slender, cylindrical, extend- 

 ing to or a. little beyond the anal angle of the secondaries. 



This genus is rea<lily recognized by the narrow, angulate<l [>rimaries 

 and by the peculiar i)alpal structure of both sexes. No other genus iu 

 our fauna has the jteculiar ap|)endage bearing an expansible brush or 

 pencil of hair in the male. The structure of the fore legs in the latter 

 sex is after the Hennliiid type, though characteristically inodilied as 

 above described. 



We have two species whicli are readily distinguishable, and yet very 

 similar. P. nncjulalis is soinew hat tlie larger, with rusty, red brown 

 markings over a more yellow ish base, and a yellow patch in the exca- 

 vation on the outer margin below the apex. The sub-terminal line has 

 a small W at the middle. 



P. a.sopialis is smaller, darker, more purplish brown, the marking 

 blackish, while a blackish patch on the excavation below apex replaces 

 the yellow of J'. niuinhtJis^ and the W of the subterminal line is much 

 more prominent, usually extending to the margin and completely cut 

 ting the tei iiiiiial space. Structural characters are also present, readily 



