A REVISION OF THE DELTOID MOTHS SMITH. 90 



anterior line wliito with an ontward black ('(l^inji', a littleontcnrNcd on 

 the costa, strongly outwardly obliinui to tiie intennil vein and then 

 inwardly to the iiiiid niai'uin. Ilelow the median vein the basal space 

 IS i)aler and nioic white powdered than in the costal re<;ion, and below 

 the internal vein the lin<r is obscure, the pale shade thus in\adm<;' a 

 little the median space. Transverse i)Osterior line black, outwardly 

 ed.ii'ed with white and followed by a vague yellowish brown line; out- 

 wardly obli(iue, but with an inward curve from the costa to vein five, 

 thus forming an obtuse tooth, and running; thence a little oblifjue and 

 somewhat irregularly sinuate to the inner margin. Subterminal line 

 white, i)unctif()rm, i)receded by more or less obvious black spots some- 

 times wanting; prect^led also on the costa by a dusky jtatch, most evi- 

 dent in the paler specimens. Ajjex usually paler, interiorly nuirked by 

 an oblicpie dark or blackish shade, usually divided into two black spots 

 and occasionally abnost wanting, in the lattei" case the apex being 

 nearly concolorous. A series of terminal lunnles, sometinu's forming 

 an almost continuous line, preceded by variously obvious pale or white 

 lunate spots. (>r<linary si)ots black, com])osed of elevated scales — a 

 small dot for the oibicular, an upright line for the reniform. Sec- 

 ondaries varying from pale fuscous gray to dark smoky brown, immacu- 

 late except for a broken black terminal line; the fringes cut with yel- 

 low. l>eneath gray to smoky, i»owdery, with an extra median line and 

 a discal lunule, which latter is usually obsolete on the primaries. 



Expanse of wings, 27 to 32 mm. = 1.10 to 1.30 inches. 



Habitat. — Camula to District of Columbia; westward to Uiitish 

 Columbia; Central States, Canada and New York in June; District of 

 Columbia in August. 



This species differs at once from all those previously described by 

 the complete transverse anterior line; but this is yet very oblique and 

 especially in the female tends to become lost on the internal vein, and 

 when the pale shade partially invades the median space below this 

 vein the resemblance to B. hijiu/alis becomes marked. The sexual dilTer- 

 ence in this species is strongly emiihasized, the male being much 

 darker, sometimes almost uniform in tint throughout, much more 

 robust, and with much looser, coarser, and longer thoracic clothing. 

 The breast is wooly, the vestiture thin but dense, loose, and divergent, 

 forming an incomplete tufting at the base of the abdomen. It is possi- 

 ble that with fresh specimens at hand we may (ind at this point a 

 secondary sexual structure; but my material is neither sullicient in 

 amount nor satisfacrtory in quality to enable me to make out with cer- 

 tainty what I can only suspect. In wing form the si)ecies is somewhat 

 intermediate between B. baltimoralis and B. hijufialis. The costa is 

 scarcely arched, the apex is })ointe(l. the outer margin even, obli(|Uc, a 

 little rounded only. In the male the primaries are wider than in the 

 female. 



