46 BULLETIN 38, UNITED STATES NATIONAL MUSEUM. 



Stigmata concolorous, ringed with black, very large. Claviforui in- 

 complete; orbicular a little flattened, ovate; reniforni moderately ex- 

 cavate. T. p. line narrow, geminate, regularly and slightly scalloped, 

 with a deeper incision opposite the cell. Subterminal space rather 

 wide, bright brown ; s. t. line faint, pale ; terminal space rather narrow, 

 dark gray. A dentate black, continuous terminal line. Hind wings 

 pale gray, fuscous, with pale fringes touched with blackish at extrem- 

 ity of veins ; a black terminal line. Beneath pale, powdered with dark 

 scales; an indistinct common outer line; discal lunule filled in and 

 prominent on hind wings, empty on primaries. Abdomen pale; thorax 

 gray, darker shaded on teguhe. Second jialpal joint outwardly black. 

 Front white inferiorly below a frontal black line. The collar has no 

 transverse black line, but is tipped with a darker shade." 



"A second specimen * * * has the wings more obscure, the 

 brown subterminal impromiuent. In the type there is merely a black 

 line inferiorly connecting the stigmata along the median vein. In the 

 Canadian specimen the orbicular and reniform are also connected supe- 

 riorly with a black line. The lunate discal mark beneath on hind 

 wings, distinct and large; on the primaries empty in both specimens. 

 The common exterior shade line on the primaries is even, on hind wings, 

 irregular." 



Expands 39-42'"">; 1.56-1.68 inches. 



Habitat. — Massachusetts, Canada, "Middle and Eastern States." 



Easily distinguished by the unusually large and pale ordinary spots. 

 It seems rare, though I have received it a number of times for identi- 

 fication. Mr. Thaxter found the cocoon from which the type emerged 

 under ijine bark in April, when the larva had not yet become pupa. 

 The cocoon was tough, not unlike that of Cerura. Larva dull white, 

 with blackish markings. 



Platagrotis sincera H. Sch. 

 1881. H. Sell., Eur., Scbmett, ii, 412, Jgrotis. 



Eather even gray, somewhat irrorate with black. Median line very 

 distinct, single. T. a. line with a single outward curve from costa to vein 

 1, and a small curve thence to hind margin. T. p. line lunulate, out- 

 wardly curved to vein 3, then inward to inner margin; the curves more 

 distinct than in trabalis, its near ally. S. t. line even, concolorous, 

 marked by a row of preceding sagittate spots. A row of terminal lu- 

 nules. Claviform small, narrow, black marked. Orbicular large round, 

 whitish, reuiform rather narrow, dusky, touching the orbicular. Sec- 

 ondaries pale fuscous, marked by a faint double exterior line. Be- 

 neath powdery, a distinct dusky transverse line and discal lunule. 

 Head and thorax concolorous. 



Expands 39""^' ; 1.5 inches. 



HABITAT. — Labrador. 



