Notes and Descriptions, JVb. 2. 13 



subject to variation. The fourth is, as usual, fainter than the rest and 

 very contiguous to the fifth. 



Posterior wings very pale, crossed by a rather broad, pale, median 

 shade. Under surface p;iler than upper, deepening in color towards 

 external margin j fringes dark. 



The scales which clothe the head and form the thoracic patch, are 

 dark tawny-brown, deepening in color towards the edges of the thorax. 

 The metathoracic and lateral hairs are very pale. Abdomen pale, 

 testaceous; anal segment concolorous with the rest. 



Exp. % and 9 , 1.80 to 2.30 inches. Length of body, 0.78 to 1.10 

 inch. 



Habitat. — West Farms, N. Y., (Mr. J. Angus.) Long Island, 

 N. Y., (Messrs. II. J. Rich and E. L. Graef.) ? Seekonk, R. L, (Mrs. 

 S. W. Bridgham.) 



Mature Larva. — Entirely purplish-black, immaculate, thickly clothed 

 with long whitish hair, which arises in spreading fascicles laterally on 

 the segments above the legs and more sparsely dorsally. The larva 

 before the last moult is striped like that of D. ministra, with the 

 immature stages of which it has not been compared. The entirely dif- 

 ferent coloration and shaggy appearance after its last moult, are very 

 characteristic and anomalous. It has been found on apple-trees etc., 

 like D. ministra. Enters the ground in September; the imago appears 

 from the middle to the end of July. (Auth. Angus.) 



Datana integerrima is our commonest species and generally resem- 

 bles Datana ministra, from which it may be distinguished by the non- 

 excavate external margin of the anterior wings, its general paler and 

 duller color and in that the transverse lines are accompanied usually 

 by paler marginal shades. 



Datana ministra, Fitch, 1st Rep. Plate 4, fig. 3, is not Drury's 

 species, from which it may be distinguished by its descriptive non- 

 excavate external margin of the primaries. The larva does not 

 correspond with either that of D. integerrima or of D. contracta, and 

 it is not impossible that it is a hitherto unrecognized and separate 

 species. An imago sent us from Albany strengthens this opinion since 

 it agrees with Dr. Fitch's figure and differs from D. integerrima in its 

 brighter color, the transverse lines not followed by paler shades. A 

 second species with entire primaries, of a paler color than D. integer- 

 rima, and with a different larva may have to be separated as distinct. 

 To provide for this we have described as D. integerrima the specimens 

 received from Mr. Angus and associated with the larva. 



