AMERICAN LEPIDOPTERA. 185 



nate, whitish band. A narrow, terminal, darker shaded line. Ner- 

 vules marked with darker scales. Fringes, interrupted with black at 

 extremity of nervules. 



Beneath, both wings are obscure smoky-grey, sprinkled with dark 

 scales subterminally on the primaries. Nervules marked with dark 

 scales. Fringes prominently interrupted with dark scales. The se- 

 condaries are paler, whitish, the dark scales form a fiiut median shade, 

 and spread over the terminal portion of the wing. 



Expanse^ $ , 2.20 inch. Lcngtli of ho(Jij^ 0.95 inch. 



Ilnhltat. — Atlantic District. (Pennsylvania !) 



Allied to H. tessella, but to be distinguished by the darker prima- 

 ries, the more powdery transverse lines, and the concolorous thorax. 

 The primaries are longer and straighter along the costa; the antennae 

 are brighter, testaceous, and longer, compared with the female H. tes- 

 sella. The general shape and proportions are more as in H. subalbi- 

 cans, Grote. Compared with H. tessella, the abdomen is paler. The 

 contrast between the pale bluish-green thorax and the finely obscure, 

 olivaceous median space of the primaries in H. elongata, is an evident 

 character, while there is a similarity between the course of the trans- 

 verse lines and the style of ornamentation of the two species. 



Heterocampa pulverea, n. s. (Plate 4, fig. 32, 9-) 



$ . Head, dull ashen ; the small palpi marked with black at the 

 sides. Antennae, rather short and stout ; beneath, testaceous; above, 

 clothed entirely with ashen scales and finely subannulate with black. 

 Thorax, olivaceous ashen. Prothorax with a linear darker shade. Pa- 

 tagia edged within by a darker linear shade. Metathoracic tuft, pro- 

 minent, tipped with dark scales. Abdomen, smoky grey, stout; a nar- 

 row dorsal black line of slightly raised scales, which are developed on 

 first, fourth, fifth and sixth segments, into prominent blackish tufts. 

 Anal segment somewhat tinged with olivaceous above. Beneath, smo- 

 ky grey ; the thoracic hairs are whitish. Tarsi subannulate with black, 

 and middle and fore tibiae once barred with black. 



Primaries, olivaceous ashen. A clear colored, reduced, basal space. 

 A distinct, geminate, blackish half-line, in which the outer line is the 

 more broadly expressed. The prominent sub-basal space is dark oli- 

 vaceous, obscured by blackish intermixed scales, especially centrally. 

 Median space, paler, olivaceous. Transverse anterior line, black, ge- 

 minate, dentate ; the space included is medially stained with brown, 

 which color extends over the discal cell; the outer line is much fainter 

 than the inner. A narrow, distinct, discal, lunate streak, preceded by 



TKANS. AMER. ENT. SOC. (24) AUGUST, 1867. 



