256 



wings being obsolete, more distinct on the hind wings, where there are two 

 lines, and l>y the three costal triangular spots as well as the large discal spot, 

 and another large brown patch on the inner edge of the fore wing; while 

 beneath, the wings are much more strigated than above. The New York 

 and Vancouver's Island examples present mi differences in size or markings. 



Thamnonoma pjliAVicaeia, sp. imr. Plate 13, fig. 40. 



2 <? and 3 9. — Structurally, this species is closely allied to T. brunnearia 

 and argillacearia, but the fore wings are a little more falcate and the hind 

 wings more produced than in these species, the hind wings of the female 

 being considerably more so than in the male. Antennae of the male well 

 pectinated; body and wings bright yellow-ochreous, the hind wings being con- 

 colorous with the anterior pair. Fore wings yellow, quite thickly dusted 

 with brown; four well-marked costal spots, the third being the largest, the 

 fourth narrower and usually forming part of the extradiscal line, which is 

 sinuous, and toward the inner margin accompanied by a broad shade. Just 

 beyond the middle of the line is either a single or twin patch, often well 

 defined and square. In the female, there are four subparallel lines, the three 

 inner costal spots sending lines across the wing. In both sexes, the discal 

 dots are ve y distinct. In the male, there are traces of a single submarginal 

 line; but, in the female, there are traces of two, one extradiscal and one sub- 

 marginal. The under side of the male is concolorous with the upper side, 

 while the discal dots are very distinct, and there is a broad, brown, submar- 

 ginal, indistinct band, common to both wings ; while, in the female, there are 

 traces of an extradiscal line, common to both wings. 



Length of body, c?,0.46, 9,0.52; of fore wings, <?,0.58, 9,0.58; expanse 

 of wings, 1.15 inches. 



Manitou, Colorado, July 13-16, common, flying about the cliffs in 

 William's Canon ; common in gardens July 21, Salt Lake City, and in fields, 

 Farmington, Utah, July 20 (Packard, Hayden's Survey). 



This species differs from T. sulphuraria in the less decided straw-yellow 

 hue, and the more decidedly falcate wings, and the heavier, darker markings. 



Thamnonoma brunnearia Lcderer. Plate 9, tig. 63. 



•• Geomctra brunneata Thunb., Diss. Ent., i, It, 1784." 



" Qeometra pinelaria Hiibn., Schm. Eur., tab. 24, fig. 1H0 (after 1797)." 



" Qeometra quinquaria Hiibn.. Schm. Eur., tab. 100, ii^. 516, .M7, $, after 1797." 



