176 GROTE & ROBINSON. 



fig. 1," while tlie habitat is given of "America" ou Drury's authority. 

 The work cited is of very okl date and unknown to us ; until the spe- 

 cies intended is identified, there can be no impropriety in retaining 

 Kirby's name for our common species. 



Family, BOMBYCTDAE. 



Sub-family, Ptilgdontinae.* 



DASYLOPHIA, Paclcard. 

 Dasylophia interna, Pacl-ard. (Plate 4, fig. 31, % .) 



Daiiylophia interna, Pack., Ryn. U. S. Bombyc, P. E. S. Phil., Vol. iii, p. 

 363. (Xov., 1864.) 



% . Head, obscure pule ochreous-brown ; the vertical tuft, between 

 the antennae, mixed with pale scales. Antennae, lengthily bipectinate 

 for three-fourths of their length from base ; the stem, above, dusted 

 with whitish scales. Labial palpi shaded above with darker scales. 

 Prothorax, pale brown, edged behind with a black line, as are the te- 

 gulae within. The brown color fades to pale testaceous cinereous over 

 the patagia and hind parts of the thorax, while the abdomen, which is 

 paler beneath, becomes of a more smoky grey above. Legs and tho- 

 rax, beneath, pale testaceous cinereous; tarsi, subannulate with dark 

 scales. 



The anterior wings, within the first median transverse line, are 

 shaded from the base outwardly with pale, bright brown, this color 

 leaving the costal region of a contrasted blackish-brown, spreading out- 

 wardly as an obliquely limited, widening shade, to the first median 

 transverse line. This latter is obsolete above the median nervure and 

 hardly to be detected; below, at the point whence the fourth median 

 uervule"}" is thrown off, the line appears as an inwardly curved, black 

 streak, within which a second more greatly curved and plainly marked, 

 which includes superiorly a distinct black spot formed by slightly 

 raised scales. The space included by the two lines is pale grey. Me- 

 dian space, pale grey; nervules longitudinally marked with dark scales. 

 The transverse posterior (second median) line appears as a pale grey 

 shade, limiting outwardly the median space. It is preceded by a nar- 

 row, faint, dark post-median shade-line, which is coincident and appro- 

 ximate with it, especially inferiorly. The t. p. line itself runs dowu- 



* For the sake of conformity we have adopted the Sub-family termination in- 

 stea<l of the usual Ptilodontes, Hllb., a terra which has ])riority over thatof iVo- 

 todontidae, Steph., and dilTering but equivalent names proposed by Duponchel 

 and Ilerrich-Schaefi'er. 



I This nervule is perhaps better designated as the third median. 



