NATURAL SCIENCES OP PHILADELPHIA. 157 



angulated about the middle and sends a false nervule through the disk to the 

 base of the wing, and above this arises the discal nervule. 



The median nervure is four-branched. In place of the fold is a slender, 

 simple nervure. The submedian sends two branches to the inner margin, one 

 from the upper third and one from the lower third of the nervure. (This may 

 be a malformation. However I can scarcely believe it is one.) 



Hind wings without costal nervure. The subcostal forms an imperfect cell 

 at its base, and near the hind end of the disk sends off an apical branch, which 

 gives rise to an oblique but not angulated discal nervure ; from this arises a 

 false nervule running to the base, and nearly opposite to it a discal nervule to 

 the hind margin. 



Median nervure four-branched. Submedian and internal, simple. 



Body stout and very pilose, woolly. Head rather small : eyes rather large 

 and salient. Antennae, basal joint somewhat tufted, rather longer than the 

 thorax, rather deeply pectinated with the branches decreasing in length to the 

 tip, and both sets directed forward. Labial palpi extremely short, almost ru- 

 dimentary. Tongue none. Abdomen equal in length to the hind wings. 

 Tibiae moderately ciliated exteriorly ; hind tibiae with two very short apical 

 spurs. 



This genus may, perhaps, be the same as Mr. Walker's Lagoa. 



P. lanuginosa. Female? The wings are badly worn and denuded. 

 Antennas pale brownish-yellow. Face dark brownish : head and body dull 

 yellow. The anterior tibiae and all the tarsi are dark brownish. The un- 

 denuded portion of the fore wings at the base, is woolly and pale brownish 

 yellow. 



Male ? Antennae yellowish white. Face and the fore legs blackish-brown, 

 the hairs white and all the tarsi blackish-brown toward the ends. Thorax 

 white, very slightly tinted with yellowish. Abdomen rather deep, dull yel- 

 low. Wings white, slightly tinted with yellowish ; fore wings woolly toward 

 the base, with a dark brownish discoloration along the upper part of the disk 

 and the costa adjoining it. 



The female ? of this species was ticketed by the collector Bombyx 1 a n u - 

 g i n o s u s , but I have not been able to find any description under this name, 

 nor any that designates the insect itself. 



From the Smithsonian Institution. Capt. Pope's coll. Texas. 



Limacodes Latreille. 



L. laticlavia . Body and fore wings rather dark ochreous-yellow. 

 Fore wings with an oblique silvery band, inclined toward the base of the wing, 

 from the costa to the middle of inner margin, and toothed toward the base on 

 the submedian nervure or fold. A rather faint dark reddish brown line, ex- 

 tends from the costal origin of the silvery band to the hind margin beneath 

 the middle. Hind wings pale ochreous-yellow. Abdomen rather reddisb- 

 ochreous. 



Larva. Outline elliptical somewhat pointed behind ; body flattened, with 

 the sides curving from a central ridge, flattened above. The ridge has a ver- 

 tical elevation at its sides above the body, growing less and less before and be- 

 hind, and terminates in front in a rounded margin and behind in an obtuse, 

 short spine. The body is smooth, with no distinct spined papulae, but the 

 edges of the ridge and the outline of the body are thrown into folds, subcre- 

 nated. The body is thickest in the middle where it curves anteriorly nnd 

 posteriorly. 



The general color of the body is pale green and dotted with numerous yel- 

 low points. The central ridge is bordered in front with yellow. 



The larva feeds on the underside of the leaf of maple in September, and the 

 imago from it appears in the spring. There is doubtless a spring brood of 

 larvae. 



I860.] 



