818 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



1902 specimen is a curious aberration of the ininimalis form, all the 

 marks lost and replaced T\y broad, heav}", black sul)basal and snbter- 

 minal bands. Another suffused and nearl}^ illiterate specimen in Mr. 

 Cockle's collection has been named inelegmis Smith, but a careful obser- 

 vation shows the or])icnlar to be closed and the determination to have 

 been hasty. 



RHYNCHAGROTIS TRIGONA Smith. 



Sixty-three specimens, Jul}^ 2, 19, 25, 27, 30, 31, August 3, 4, 5, 6, 

 T, 13, 15, 16, 17, 18. Extremely variable, from light ochero.us to dark 

 brown. It is nearly allied to placida^ but distinguished therefrom by 

 the narrow constricted reniform. The specimens all run darker than 

 Smith's Arizona type before me; only one is as light as it. 



RHYNCHAGROTIS VARIATA Grote. 



Two hundred and four specimens, June 16, 21, 23, July 4, 14, 15, 

 17, 19, 21, 22, 24, 25, 29, 30, 31, August 4, 5, 6, 13, 16, 17. This species 

 well deserves its name, as it varies in color from dark vinous red to 

 stone gra3^ The markings, however, are fairly constant. No larvae 

 were obtained, though repeated unsuccessful attempts were made to 

 induce the females to deposit eggs. 



RHYNCHAGROTIS SCOPEOPS Dyar. 



Five specimens, August 5, 6, and one in Mr. Cockle's collection. 



RHYNCHAGROTIS COSTATA Grote. 



Seventy specimens, July 25, 30, 31, August 3, 4, 5, 6, 7, 11, 13, 15, 

 16, 17, 21 (Revelstoke). Very variable, from dark purple brown to 

 light ocherous clay color. This species has been named costata Grote 

 and confum. Smith in Mr. Cockle's collection, but after attempting to 

 separate two species in my series, I am convinced that it can not be 

 done. Costata has the collar broadly tipped with black and confma 

 not so, according to Prof. J. B. Smith's published articles, and these 

 two forms are present in my material, but the}" insensibly intergrade. 

 The dark specimens have the black tip to the collar, the pale ones lack 

 it, while intermediate ones have a purple brown tip, which can be 

 interpreted either way. The slight differences in the male genitalia, 

 as shown by Smith, '^^ are apparently not of specific value. 



ADELPHAGROTIS INDETERMINATA Walker. 



Three hundr'ed and fifty-nine specimens, July 27, 30, 31, August 1, 

 3, 4, 5, 6, 7, 12, 13, 15, 16, 17, 21 (Revelstoke), September 1 (Van- 

 couver Island). A very constant and easily recognizable species, most 



"Bull. 38, IT. 8. National Museum, pi. xi, figs. 7 and 9. 



