^"I'soh"''] PROCEEDINGS OF THE NATIONAL MUSEUM 209 



brown. Orbicnhir oval or roundcnl, concoloroiis, defined and irrorate 

 witli blue scales. Renilortn moderate, not constricted, whitish, some- 

 what marked with brownish, and irrorate with blue scales. The termi- 

 nal space is also more or less irrorate with blue .scales. St'condaries of 

 $ white, of 9 pale fuscous. Beneath i»ale, with yellowish irrorations 

 and a comujon external line. Head and thorax concolorous with pri- 

 maries. Abdomen fusco luteous, with distinct dorsal tufts, that on the 

 fourth sefjment most prominent. Antennae of male distinctly serrate, 

 the serrations bristled. 



Expands 25""" (1 inch). 



Habitat. — Texas. 



The pair from which the species was descril)etl is from Mr. lly. Ed- 

 wards, to whose kindness I owed oue of the si)ecimens, now in the Na- 

 tional Museum collection. 



This is one of the i)rettiest of our species; its bright colors, bluish 

 median and yellow s. t. lines, and pale reniform, rendering it easily 

 recognizable. The fringes of primaries are long, even, cut with obscure 

 violet. 



The harpes of the male are moderate, but little dilated at tip and 

 rounded. The clasper is simple, stout, rather short, curved, somewhat 

 irregularly enlarged at tip. It is utterly unlike anything else in this 

 series. 



Mamestra determinata, sp. uov. 



Head and thorax carneous gray, much as in lus(raU.<i. Primaries 

 pale reddish-gra^' brown or pile fawn, the median space a deeper shade 

 of same color. T. a. line well removed from base, single, black, out- 

 wardly oblique and outcurved between the veins. This leaves a large 

 evenly colored basal space taking uj) on inner margin fully half of the 

 wing. T. J), line single, black, tine, crenulate, outcurved over (;ell and 

 thence almost parallel with outer margin. S. t. line indicated only by 

 a dusky costal patch in s. t. S[)ace, and by some va^ue darker shadings 

 in terminal space. An interrupteil dark terminal line, and a pale line 

 at base of fringes. Claviform a small cusp attached to t. a. line. Or- 

 bicular vague, slightly paler, moderate in size, and entirely indetinite. 

 Kenitbrm large, upright, oval, paler than ground color, blackish, filled 

 interiorly by a somewhat dift'iise, angulated, vague median shade. Sec- 

 ondaries smoky, outwar.lly darker, a yellowish line at base of fringes. 

 Beneath, whitish, powdery, with a blackish extra discal line and a 

 small disoal spot. 



Expands 30"'"' (1.20 inches). 



liAiJiTAT. — Foothills, Colorado (Bruce). 



A single male specimen in good condition, easily distinct from all its 



allies. It has more the maculation of iKstralis, but very much better 



defined, the ground color also ditVerent. In genital structure, on the 



contrary, the resemblance to meditata is striking, and shows the refer- 



Proc. X. M. 91 11 



