^°l89i" ] PKOCEEDIXGS OF THE NATIONAL MUSEUM 265 



stead of beiug equal to tip the main shank is greatly inflated and almost 

 squarely cut oft". A comparison of the figures will bring out these i)oints 

 much better. This is oneof the cases where species hardly distinguish- 

 able in color and maculation afford good structural differences. 

 In tabular form the characters described appear as follows: 



Claviform attached to a black basal line. 

 T. a. line vague or wauting. 

 Claviform pale, discoloroiis from base; color pale gray with a paler 9. t. space ; t. p. 



line imlistinct longiclava. 



Claviform concolorous; color dark fuscous gray, s. t. space darker; t. i>. line very 



distinct, even, pale orbiculata. 



Claviform attached to the very distinct t. a. line. 

 Basal dasli not reaching beyond the basal line. 

 T. p. line strongly incurved below reniform ; claviform moderate. Vestitnre velvety 



in appearance axol'IXa. 



T. p. line normally oblique and sinuate, claviform usually crossing median space. 

 Broader winged, usually paler, $ antennie thicker, maculation distinct, ordinary 



spots larger pexsilis. 



Narrower winged, ^ antenme slighter, maculation often indistinct, ordinary 

 spots smaller vicina. 



Mamestra longiclava, sp. nov. 



Pale whitish gray with an admixture of yellowish hair and scales. 

 Collar inferiorly more yellowish. Patagi.ne margined by black scales, 

 most evident at base of the wings. Primaries with the basal lines 

 marked only as geminate, dusky costal spots. T. p. line indicated by a 

 difference in shade between median and s. t. spaces, showing it to be 

 very strongly incurved below cell. A broad wedgeshajjed paler gray 

 space starting at the apex, inwardly marked by a dusky costal patch 

 in s. t. space, then widening evenly so as to take in the whole of the s. t. 

 si)ace to hind margin. S. t. line marked by a series of black and ocher 

 yellow scales, beyond which the terminal space is dusky, and a whitish 

 spot strongly marked with black and ocher scales opposite hind angle. 

 The veins are all marked with black and white scales. A dusky ter- 

 minal line. Fringes yellowish gray, with a dusky central and terminal 

 line. Claviform discolorous, pale, starting at base and extending to 

 the t. p. line, margined with black. Orbicular irregular, oval, oblique, 

 black ringed, with an interior whitish annulus, center with ocherous 

 scales. Keniform large, outwardly diffuse, merging into the pale s, t. 

 shade, inwardly marked by a curved black Hue, and a broader whitish 

 lunule which is faintly traceable all around the .si)ot. Secondaries 

 whitish, veins and outer margin soiled. IJeneath, white, powdery, with 

 a discal spot on all wings. 



Expands 30""" (1.20 inches). 



Habitat.— Colorado ( Bruce). 



A single male specimen from Mr. Neumcegen's collection. The male 

 genitalia ally this with anguina, from which it is widely separated in all 

 other respects. The long discolorous claviform is unique, and the ocher- 



