85 



species ; some of our Colorado material can hardly be separated from 

 Eastern specimens. The species which has been generally going under 

 the name of fragilis has much shorter palpi and we believe is a Colo- 

 rado race of costata Stretch from Texas, distinguished by the flesh 

 colored primaries instead of the mouse gray found in typical costata; 

 due to this color the scarlet costa and discal spot are much less notice- 

 able, the latter in fact being at times quite lacking; the secondaries 

 are only slightly deeper in color than the primaries so that the whole 

 insect has a much more unicolorous appearance than costata. 



As this form is apparently quite constant we propose for it the 

 racial name costata pallipennis (PI. XIV, Fig. 14), our types being 

 a series of specimens from Glenwood Spgs., Colo. (July). 



DiACRISIA vagans Bdv. 



The synonymy of this species is considerably involved and although 

 a number of authors have attempted to elucidate the matter, each 

 seems to have arrived at a separate conclusion. Vagans was described 

 by Boisduval in 1852 (Ann. Soc. Ent. Fr. X, 322) as follows: "Size 

 of the largest specimens of fuliginosa. Primaries and thorax yellow- 

 ish-gray. Secondaries black with the fringe broadly yellowish-gray. 

 Abdomen blackish-gray. Beneath the four wings are yellowish gray 

 with a black lunule on the disk of each. S Antennae rather strongly 

 pectinated." The type locality was given as Northern California. 



In 1855 in Bull. Soc. Ent. Fr. Ill, 32, the name rufida is given 

 by Boisduval to a series from California which he intended to describe 

 and which is here very briefly characterized as having "the primaries 

 of a ruddy-brown with a blackish discal spot and transverse streak 

 (raie transverse) ; the secondaries are blackish with ruddy-brown 

 fringe; the body is without spots, reddish like the primaries." 



Later in 1869 (Lep. de la Calif, pp. 79-80) Boisduval goes into 

 further details regarding these two species, giving the size of nifula 

 as equal to that of mendica and calling attention to the great variability 

 in color in both sexes of both species ; he quotes Lorquin as stating 

 that the larvae are different and separates the two species on the 

 strength of a bent extradiscal line on primaries in rufula which is lack- 

 ing in vagans. 



In the meantime Packard (1864, Proc. Ent. Soc. Phil. Ill, 123) 

 had described his punctata in his Synopsis of the Bombycidae of North 



