THE CANADIAN ENTOMOLOGIST. 233 



of Lycaenidae examined were as follows : Of Lycceides, anna, melissa, 

 acmon, Scudderii ; of Glaucopsyche, fygdamas, oro, Couperii , of Cyaniris, 

 pseudargiolus (6), violacea (5), neglecta (2), lucia ; of Everes, comyntas (4). 



In the first place, the 1st superior branch of subcostal is given as 

 arising in Everes at 50 per cent. + , of the distance from base to apex of 

 cell. I find it to vary from 50. to 54.5. In Lycaeides it should arise at 

 67. ; I find 52.2 to 59.8. In Cyaniris the Revision gives " scarcely 

 Yl " (67. — ) ; I find 55.7 to 64. In Glaucopsyche it should arise " some- 

 what beyond the middle " (50. 4 ) ; I find 57.8 to 63.1. The reader will 

 notice how these numbers overlap each other, thus totally failing to give 

 any distinction between the groups. 



The second branch of the same nervure should arise in Lycaides at 

 50 per cent, of the distance between the 1st superior and 1st inferior 

 branches; I find 44.8 to 47.4. In Glaucopsyche, also 50 percent., my 

 results being 37.7 to 46.9. In Cyam'ris this nervure should arise at " less 

 than half way from base to apex of cell ; ' (50 per cent. — ) ; I find 43.4 to 

 51.9, and in Everes instead of 25., I find 30. to ^ In this last case the 

 numbers do not overlap, probably because only one species (4 specimens) 

 of Everes was examined, since the variation among individuals in the 

 other groups is very considerable, and this is the only instance of the kind 

 that I have found in comparing the venation of these genera. 



Again, in length of cell as compared to length of wing, Everes varies 

 from 43. to 49. per cent. (Revision gives 50. — ) ; Cyaniris from 47.3 to 

 52.2 (Revision gives 50.) ; Lycceides from 47.3 to 48.9 (Revision gives 

 50 + ), and Glaucopsyche from 49.3 to 51.1 (Revision gives 50 + ). 



I have adduced these Lycaenas since the published article tabulates 

 their differences, but Mr. Peabody has kindly forwarded me advance 

 sheets of a similar arrangement of the characters of other groups, and 

 there the variation is perhaps even more striking than with the Blues. 



In the table giving the distinctions whereon are based the genera 

 Speyeria, Argynnis and Brenthis of Mr. Scudder, taking up every char- 

 acter seriatim, we find, first, that the antennae of Speyeria and Brenthis are 

 " a little longer than the abdomen," and of Argynnis " considerably 

 longer than the abdomen." Taking the length of the abdomen as the 

 unit, I found that the antenna measures in Speyeria 1.12 and 1.T3, in 

 Bre?ithis from 1.15 to 1.44, and in Argynnis from 0.93 to 1.37, which is 

 certainly not in accordance with the characters as given. 



The next characters relate to the number of joints of the antennae, 



