THE CANADIAN ENTOMOLOGIST. 45 



latter which hibernates. Mr. Rowley calls my attention to a decided 

 seasonal dimorphism in the two broods of the females. 



Prof. French gives the localities as the Western States, from Illinois 

 and Nebraska to Texas, the presence of the butterfly no doubt being 

 determined by the presence of the food plant. 



SOME OBSERVATIONS MADE IN 1887 ON DANAIS 



ARCHIPPUS, Fabr. 



BY WM. D. MARSH, AMHERST COLLEGE, MASS. 



Mr. Scudder, in his "Butterflies," p. 136, says of this species: "It 

 is the longest lived of our butterflies. It leaves its winter quarters later 

 in the season than other hibernating butterflies, and continues upon the 

 wing until July and August, laying eggs all the time, so that the insect 



may be found in all its earlier stages most of the summer 



Whether or not there is a second brood in New England is doubtful ; but 

 the earliest butterflies which have not hibernated may be found in July, so 

 that while the earlier stages are passed rapidly, the perfect insect often 

 lives a full year, mingling on the wing with its own progeny, and witness- 

 ing the decay and renewed growth of the plant which nourished it ; for 

 the milk-weed dies early, and is not sufficiently grown to support the 

 caterpillars when the first butterflies appear in the spring." 



I understand that Mr". Scudder still holds substantially these views 

 of the habits of Archippus in New England, and at any rate has published 

 nothing to the contrary. 



Early in the summer of 1887, Mr. \V. H. Edwards wrote me with the 

 request that I would make a study of Archippus. As my college term did 

 not close till June 25th, all my observations before that date were made at 

 Amherst; from June 25th to August 12th, at Randolph, Vt., a hill-town, 

 37 miles N. W. from White River Junction. 



1. Hibernated Archippus were observed at Amherst, May 15 and 

 May 21, and recognised as such by their faded and ragged condition. I 

 searched for eggs, but found none. I may say here that at no time after 



