144 ZYG^NID^. AND BOMBYCID/E 



Antennae pale rust red. Legs yellowish, clothed with long grayish 

 brown hairs. 



Anterior wings blackish brown sprinkled with dirty white scales. 

 A basal, dirty white, oblique band angulated near the costa ; a 

 transverse, oblique, band beyond the middle, parallel with the outer 

 margin, and of the same color ; and finally a narrow marginal band 

 of the same color. Fringes concolorous. The gray coloring thus 

 becomes a basal cloud ; a mesial band somewhat broadest on the 

 costa, palest in the centre, and carrying a whitish transverse lunate 

 black bordered discal spot ; and a more diffuse, sub-marginal cloud, 

 which does not reach either the costal, inner or outer margins. 



Posterior wings pale yellowish white, immaculate, somewhat tinged 

 with yellowish on the inner margin. 



Beneath, the markings of the primaries reappear but more faindy, 

 the base of the costa being clothed with carneous hairs ; secondaries 

 as above, a few carneous hairs at the base. 



?. — Much larger than $, costa of the primaries slightly convex. 

 The whitish markings are reduced to a narrow angulated sub-basal 

 band, somewhat spread on the costa, and a narrow oblique band of 

 the same color from the inner margin to the costa near the apex. 

 Fringes whitish. Discal spot distinct. Secondaries pale carneous, 

 with a lighter extra mesial band. Otherwise similar to $ . 



Expanse of Wings, ^2.00 $2. 70 inches; length of body, 50.85 

 inch ? i.io inches. 



Habitat.— ^t^ Mexico. (Coll. Dr. Behr, H. Edwards, R. H. 

 Stretch. ) 



For my type of this species I am indebted to the kindness of Dr. 

 Behr, of San Francisco, in whose collection the only $ at present 

 known, is to be found. Six c? specimens show no tendency to 

 variation. All the known specimens were collected by Dr. Howard 

 who states that they were found round IMesquite trees, from which it 

 may be inferred that the larva feeds on that plant. Of the nature of 

 the country in which the insect was taken we know nothing. On this 

 point Mr. A. S. Packard says : " Whether the unusually pale color 

 of this species is to adapt it for concealment in dry and desert locali- 

 ties or not, we can only learn when we know something ot the habits 

 of the moth. " 



