200 THE CANADIAN ENTOMOLOGIST. 



ing, 26 to 27 mil. Food plant, Pinus strobus. Duration of larva stage,, 

 35 to 40 days. Described from 57 specimens. 



Pupa. — Length 9 to 11 mil.; color brown, the spaces between the 

 segments and a dorsal line darker ; wings dark green ; subterranean. 



CORRESPONDENCE. 



Dear Sir : In a recent number of the Can. Ent., Mr. Reed speaks 



of Tityrus Skipper as scarce about London. Here it is one of our most 



abundant species, and its larva can be found on the locust trees at almost 



any time throughout the summer. But this fall I found great numbers 



of them feeding on a wild trailing vine, in all stages of their growth ; this 



vine may have been their native food plant before they had the locust to 



feed upon.* Mr. Reed also mentions having found Clytus pictus. It is no 



doubt Clytus or Cyllene robinia that he refers to, pictus being the Hickory 



Clytus, and only found in the spring of the year. There is a good deal 



of confusion existing about these species, some even questioning if there 



are two. It is undoubtedly robinia that Harris describes under the name 



of pictus. Whether both species were discovered at that time I know 



not, but Walsh is reported by Packard to have said that the male of robinia 



differs from pictus in having much larger and stouter antennae, and in 



having its body tapered behind to a blunt point, while the female is not 



distinguishable at all. With 18 specimens of pictus before me, captured 



between the 17th and 21st of May, 1879, on hickory cord-wood cut the 



previous winter, and a large number of robinia, I note the following 



differences : In pictus the body is uniformly more slender and tapers more 



behind than robinia. In pictus the antennas is decidedly longer, that of 



the females reaching to the end of the body, and that of the males 



beyond. The third or W-band on the wing covers is noticeably more 



delicate than in robinia, and quite white in contrast to the yellow of the 



other's markings, a characteristic I have never seen in any robinia I ever 



met with (and I see them here in hundreds every fall feeding on the 



Golden-rod), and one which would of itself make it quite easy to pick out 



my pictus, male or female, from amongst any quantity of robinia they 



might be mixed with. 



J. Alston Moffat, Hamilton, Ont. 



*This vine, a sample of which was sent by Mr. Moffat, is Lathyrtis palusfcr //., 

 known under the common name of "The Marsh Vetchling."— [Ed. C. E. 



