10 LYC.ENA II., III. 



and early May. Mr. AY. G. Wright carefully watched the appearance of these 

 broods, the past year, and sent me scores of examples of each. Fig. 2G repre- 

 sents ? Piasiis of the early brood, 27 of the later. I give the females, because in 

 this sex the differences between the forms is most decided. I do not discover any 

 tangible difference between these two broods in either sex, except that some few 

 of each are var. Echo, which, as I have said, is close to Neglecta. The usual 

 Piasns ?, as is .seen by these Figures 2G, 27, most resembles Violacea, having the 

 black borders as in that form. Plasus <? (Fig. 20) is of a deep violet-ljlue ; and 

 the under side of all examples of both sexes is like Neglecta. I look upon this 

 western form as an offshoot of one of the eastern summer or secondary forms, the 

 characters of the primary form of the species having been in some degree 

 recovered, especially in the females. 



Violacea-cinerea appears to be the Arizona winter form, the under side ash- 

 gray, all the markings obscure. (Figs. IG, 17.) Mr. Morrison brought many ex- 

 amples in 18S2 from Mt. Graham at considerable elevation. With them Avere 

 others, nearly full-sized Pseudargiolus (Figs. 18, 19), but of a deeper blue than 

 is usual at the east ; the under side not pure white, but slightly gray. 



On Plate II. are given some curious aberrations, as Fig. 23, a bi-formed Neg- 

 lecta, taken at Coalburgh ; Fig. 24, a female sent me by Mr. Hulst ; a suft\ised 

 Lucia, Fig. 25, also from Mr. Hulst. Fig. 22 represents a 9 from egg laid by 

 Pseudargiolus, the chrysalis having been laid on ice for seven days, the butterfly 

 emerging in thirty-one days after removal. In the pattern of under side it 

 app roaches 3Iarg ina ta. 



In 1877, I noticed that the spikes of Rattle-weed were much frequented by 

 ants, and presently that where the ants were larvae were sure to be found also. 

 There soon appeai'ed indications that the ants were attracted by the larva? ; they 

 caressed them with their antenna^, running up and down their backs, and the 

 larva? in no way resented this familiarity, not even withdrawing their heads from 

 the buds they were excavating. Esjiecially did the ants seem to linger about the 

 last segments, and the eleventh particularly, and it occurred to me that there 

 might be some exudation from the surface of 11, or elsewhere, or from the stel- 

 late proce.sses, as I saw no special organs for excreting any fluid. Not having a 

 suitable glass at hand, I sent some of the larvre to Prof. Lintner, at Alban}?, and 

 by return of mail heard that he had observed two processes on 12, cylindrical, 

 with barbed hairs. Nothing more was discovered that summer, as the season for 

 these larvJB was over when the observations were made. But in October, the 

 same year, I chanced to find some of the larvos of the fall brood, and sent them 

 to Dr. Hagen for examination, in due time receiving this reply : " Dr. Mack 

 found directly three secretory organs." The next day, farther : " I have exam- 



