104 BULLETIN 48, UNITED STATES NATIONAL MUSEUM 



darker sliade line which is also inwardly diffuse and darkens the outer 

 portion of the median space; as a whole nearly upright, with well 

 marked outward bends on the median vein and in the submedian inter- 

 space. Subterminal line pale, sinuate, of the usual form, contiiuumsor 

 nearly so, sometimes marked by a darker preceding shade; but in none 

 of my specimens by blackish spots. Apex pale, limited inferiorly by 

 an oblique shade which is scarcely darker than the ground. A .series 

 of dusky terminal lunules, which are sometimes preceded by a paler 

 shading. The ordinary spots are barely indicated in my specimens by 

 a few black, raised scales. Secondaries uniformly fus<'Ous, Beneath 

 paler, powdery, nearly immaculate, or with a more or less defined 

 discal spot. 



Expaiise of wings, 24 to 27 mm. = 0.0.") to 1.08 inches. 



Haeitat. — New York to Texas. 



A specimen in the National Museum, from the Kiley collection, is 

 marked "Larva on Alder, 21, 7, 84." 



The almost immaculate male would hardly be associated with the 

 female at first sight, and as a matter of fact the females are either 

 marked B. achaiinalis or B. madefactaUs in collections, none of them 

 having been correctly associated with the opposite sex. 



The resemblance to the female />. madefactaUs is suhiciently marked 

 to justify placing it as a small, somewhat faded specimen, and the differ- 

 ences are really only comparative. The size is smaller, 25 mm. being the 

 average, the body seems more than proportionately slighter, and the 

 costa seems a little more arched, the outer margin more rounded. In 

 color it lacks all bright or rich shadings and has a dirty luteous tint, while 

 the bright violet or gray tints of the former species are replaced by a 

 sordid gray Avith a faint bluish tinging, and this even is much reduced 

 or almost wanting. The transverse posterior line is decidedly more 

 angulated, and the subterminal line is more distinct and more continu- 

 ous. With a fairly good series at hand there should be no difticnlty 

 in distinguishing the species; but isolated specimens may in some 

 instances be doubtful. 



The species seems less abundant than its ally. The type is in the 

 Philadelphia collection, a fact I was not certain of in my catalogue. 



Bomolocha iimbialis, Smith. 

 1884. Sinitli, P>iill. Hklu. Entomological Soo., VII. 4, Bomolocha. 

 Ground color dark chocolate brown. Head and thorax concolorous; 

 abdomen smoky or blackish, like the secondaries. Primaries with no 

 strong contrasts, a bluish i)owdering between the median shade and 

 transverse i)osterior line, feebly relieving an otherwise almost uniform 

 shading. Transverse anterior line a somewhaf richer brown, single, 

 broad, l)ut not contrasting, with two outcurves. A little beyond the 

 middle of the wing is a rigid, upright pale line, preceded by a richer 

 brown shading, beyond which the space is feebly blue powdered to the 



