Notes and Descriptions, No. 2. 9 



alike characterized by their entire non-excavate primaries. Of these, 

 D. integerrima sp nov. is, perhaps, our commonest species, and while 

 generally mistaken for D. ministra, may be distinguished by the 

 character of its section. The transverse lines are accompanied by 

 paler shades and the median pale shade on the secondaries is broader 

 than in D. ministra. The general coloration is duller, more brownish, 

 the irrorations fine and aggregated. Datana contracta is more yellow 

 and twany than D. integerrima, the irrorations are more conspicuous 

 than in any other species. From Walker's expressions we feel con- 

 fident that we have interpreted his description correctly, though not 

 having made any comparisons with his types, absolute certainty 

 cannot be attained in the matter of such closely allied species. The 

 frontal and thoracic patch is quite tawny while the insect is smaller 

 than D. integerrima and the anterior wings are narrower. Datana 

 perspicua is nearly allied to D. contracta in color, but is more luteous; 

 the irrorations are obsolete; the secondaries sub-diaphanous, immacu- 

 late, without any shade, the dark fringes contrasting forcibly with the 

 general color on both wings. Through the kiudness of Mr. James 

 Angus of West Farms, N. Y., who has bred D. ministra, D. angusii, 

 D. integerrima and D. contracta in many coincident individuals we 

 are indebted for alcoholic specimens of the larvaa of each of these 

 species. The observations of this gentleman are confirmatory of our 

 views that these species are distinct, since he has reared them all for 

 several seasons and found them faithful to their several types, with 

 unimportant imaginal variations. The sexes of all the species resem- 

 ble each other, so far as observed. 



"f" Anterior wings excavate along external margin. 

 Datana angusii, nov. sp. (Plate 2, fig. 1. $>•) 



Smoky brown. Anterior wings excavate between the nervules 

 along the external margin, blackish brown, with a brighter shade along 

 the costa centrally and above the apical streak. Sparsely and irregu- 

 larly irrorate with scattered black scales. Five transverse blackish 

 lines run from costa to internal margin. Of these, the first is slightly 

 arcuate. A central discal dot. The second transvere line angulate 

 below costa. running inversely obliquely to internal margin from the 

 disc. This line either intersects or runs inside of the second discal 

 spot, which is formed by an aggregation of darker scales on the discal 

 cross-vein. Third and fourth transverse lines parallel, very slightly 

 arcuate or oblique, faint, especially the fourth, which is quite con- 

 tiguous to the fifth, and last, transverse line. This latter is very 



PROCEEDINGS F.NT. SOC. PHILAD. MAY, 1S66. 



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