72 NORTH AMERICAN BUTTERFLIES. 



1G8. MELITAEA STEROPE Edw. 

 Oregon Checicer. 

 Blackish brown above with light markings as follows ; above, fore 

 wings with two rows of small spots near outer margin, a third row, di- 

 vided near upper margin, two spots in central cell, and one below it. 

 Hind wings, with a marginal row of larger crescents, then a second row 

 of dots, and a third of elongated spots. Beneath, on fore wings, mark- 

 ings repeated but more diifused ; hind wings, with the marginal cres- 

 cents but they are black-edged on both sides, and within this row, is a 

 black band that contains a series of yellowish dots, each white-pulpiled; 

 base of wings, yellowish, with a band of six Avhite spots. Expands, 1.80 

 to 1.90. Habitat, Oregon. 



1G9. MELITAEA ACASTUS Edw. 

 AcASTUS Checker. 

 Similar to M. palla but differs in being paler above, and in having 

 the spots and bands of the lower surface of hind wings, so greatly en- 

 larged as to occupy nearly the whole space. Expands, 1.50 to 1.90. 

 Habitat, Nevada, Utah, and Montana. 



170. MELITAEA PALLA Be. 

 Northern Checker. 

 Size and form of M. harrisii, but differs in being brighter in color 

 above, in having the outer black border of fore wings broken by two rows 

 of reddish spots. Fig. 29, e, and in the absence of any decided ocherous 

 spot in central cell, on fore wing beneath. Expands, 1.75 to 2.00. Hab- 

 itat, California to Washington Territory, Nevada, Montana ; Alberta, 

 Canada, and Crow's Nest, British America. Occurs in June and July. 



171. MELITAEA WHITNEYII Behr. 

 Whitney's Checker. 

 Similar to M. palla in size and form, duller in color above, and with 

 the dark lines much thinner and more regular, and the orange spots of 

 the sub-marginal band of hind wings beneath, are without Avhite cen- 

 ters. Habitat, California and Nevada. 



172. MELITAEA HOFFMANNI Behr. 



Hoffmann's Checker. 

 Similar to M. palla but differs in being yellower above, with more 

 black lines, especially on the center of fore wings ; the spots forming sub- 



