52 INSECUTOR INSClTLt MENSTRUUS 



^ Acrobasis caryalbella, new species. 



From the same trees on which A. feltdla Dyar were to be found 

 there were collected the cocoons of another species having quite a differ- 

 ent appearance. The cocoon formed by this species is straight, about 

 2 5 mm. long and 4 or 5 mm. in diameter at the widest point. It is dirty 

 white in color, more or less intermixed with or covered by the dark brown 

 frass, especially toward the outer extremity. The point of attachment is 

 at the base of a leaflet, on the under side, the opposite leaflet being fre- 

 quently drawn close to the first, enclosing the cocoon between them, and 

 the outer portions of the leaflets are usually eaten off. The material from 

 which this insect was obtained was badly parasitized, only two femaJes 

 being obtained. These corresponded to a male obtained in 1910 from 

 the same form of cocoon on hickory, which is the basis of the follovvdng 

 description. 



Head and basal enlargement of antenna white ; antennae pale yellow- 

 ish ; labial palpi whitish, with the second joint heavily shaded with dark 

 brown ; maxillary palpi white ; thorax and patagia whitish, with a rosy 

 tint ; abdomen yellow gray, shaded with purplish in the middle of the 

 segments, slightly paler below than above. The front legs are whitish 

 speckled with purplish. The middle legs have the coxae heavily shaded 

 with black along the upper side, below which they are snowy white, 

 while the thorax is here also covered with white scales, and a white tuft 

 of the same extends backward under the fore wing near the base ; the 

 femora and tibiae are whitish speckled with purplish ; the tarsi are dark 

 purplish, annulate with whitish at the joints. The hind legs are similar 

 to the middle ones in coloring, the coxae contrastingly shaded v\ath black 

 above and white below, the tibiae and tarsi, however, with less purplish 

 and the tibiae somewhat tufted with long scales above. The fore wings 

 have the basal area, which extends from about one-third of the costal to 

 one-half the dorseil meu-gin, a rosy white, shading into maroon, palest along 

 the costa and near the base ; the scale ridge is distinct but not contrast- 

 ingly marked ; along the costa there are a few black scales ; the outer 

 portion of the wing is a dark purplish gray, somewhat shaded with 

 maroon, darker along the costa ; the outer line is whitish, gently curved 

 outwardly near the middle and shaded with darker scales on the inner 

 side ; the posterior extremity of the wing is shaded with dark scales and 

 a parallel line, similarly colored, borders it in the cilia, which are yellow 

 gray ; a notch is present in the costa near the base of the wing ; on the 



