10 
LYCjENA II., III. 
and early May. Mr. W. G. Wright carefully watched the appearance of these 
broods, the past year, and sent me scores of examples of each. Fig. 2G repre¬ 
sents 9 Piasus of the early brood, 27 of the later. 1 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 
Piasus 9, as is seen by these Figures 2G, 27, most resembles Violacea, having the 
black borders as in that form. Piasus $ (Fig. 20) is of a deep violet-blue; 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. 1G, 17.) Mr. Morrison brought many ex¬ 
amples in 1882 from Mt. Graham at considerable elevation. With them were 
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 suffused 
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 
approaches Marginata. 
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 appeared indications that the ants were attracted by the larvae; they 
caressed them with their antennae, running up and down their backs, and the 
larvae in no way resented this familiarity, not even withdrawing their heads from 
the buds they were excavating. Especially 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 processes, as I saw no special organs for excreting any fluid. Not having a 
suitable glass at hand, I sent some of the larvae to Prof. Lintner, at Albany, 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 larvae was over when the observations were made. But in October, the 
same year, I chanced to find some of the larvae 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- 
