150 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



extends outside of the short curved band to the costa. It is constricted near the inner 

 dot, widening rapidly towards the costa, along which it extends towards the base 

 to a little beyond the middle. Hind wings paler, the apex and outer margin concol- 

 orous with the fore wings, fringe of all the wings pale silky brown, interlined near 

 the base with darker brown, and with a black spot on the apex- of the fore wings. 

 Fore wings beneath uniformly a little darker than above. Hind wings beneath much 

 as above, but the darker shade of the exterior margin and apex is not so distinct. 

 The wings above and beneath have the peculiar silken luster common to the genus. 

 Head, thorax, and abdomen ocherous brown. Legs grayish brown, the tarsi a little 

 paler. Length of body, T™"" ; expanse of wings, 20""°^ The wings are not so broad 

 as in P. geminata and albipunctata. (Goodell. ) 



207. Kroncea minuta Reakirt. 



According to Eeakirt the caterpillar feeds on the oak and chestnut 

 in August and September, the moth appearing in June at Philadel- 

 phia. The caterpillar is closely related to the European slug-worm 

 lAmacodes asellus. 



Egg. — Length, ^ line, pale green, a black ring near one end, oblong. 



Larva. — Length, 2 to 2| lines ; basal outline elliptical ; a flattened ridge, widened in 

 the center, extends from head to tail, curving over vertical elevations at the sides, 

 which gradually diminish before and behind, and terminate at both ends in a rounded 

 margin. Around the base a row of small, densely spined papulae, two of which, on 

 the head, are the most prominent, and colored yellow. The body is smooth, but the 

 ridge is thrown into thick, fleshy folds ; it is thickest in the middle, whence it dimin- 

 ishes anteriorly and posteriorly. Green ; two bright red lines, of equal length, cross 

 each other at right angles on the central portion of the upper ridge. 



Moth. — Male and female are alike in color, the last being the largest. Fore wings 

 lustrous, brownish-yellow ; hind wings blackish-brown. Below, testaceous, with a 

 black shade, and roseate along the costa of primaries. Antennae, thorax, abdomen, 

 and legs ocherous-yellow. Expanse : Male, 5 lines ; female, 5^ lines. (Reakirt.^ 



208. Datana integetrima Grote and Robinson. 



This insect, says Eiley in his unpublished notes, like several other 

 species of Datana, is not confined in its attacks to any one food-plant, 

 but is injurious to a variety of trees, i. e., the willow, honey-locust, 

 thorn, and apple. 



The larva. — Length 1.8 to 2 inches and very similar in appearance to D. angusii. 

 The general color is dull black, of the appearance of India rubber. Sparsely covered 

 with soft dirty white hair. Four thin sulphur-yellow lines along each side, the lower 

 one, which is just under the stigmata, being somewhat indistinct on the latter half of 

 the body, and all being more or less so on the last segment. Venter same color as 

 above, with three yellow lines, the middle one uninterrupted, except by the prolegs; 

 the outer ones interrupted in the middle of each segment by a rust-yellow spot, 

 largest on the feet-bearing segments. Head rather larger than first segment, polished 

 coal-black, with a suture down the middle and a V-shaped indentation in the center of 

 the front. The first segment (which is the most striking feature) is of a gamboge or 

 wax-yellow color, the cervical shield being darker and more shiny. The black be- 

 tween the second and third yellow lines extends about half way on this segment ; that 

 between third and fourth more than half, and under the fourth is a black line. 

 Caudal plate almost round and shiny black like the head. Thoracic legs black, with 

 gamboge or wax-yellow base ; abdominal prolegs same color, with a shiny black spot 



