222 THE CANADIAN ENTOMOLOGIST. 



Further observation will prove which view is correct. But I have seen 

 nothing to show that this is the ordinary mode of procedure for Pieridse in 

 this region ; and from the immense numbers observed, it seems to me 

 that it was one of those pecuh'ar migrations to which this group seems to 

 be particularly subject, started, perhaps, by some chance few down toward 

 Puerto Cabello, or, it may be, as far as Coro, which picked up more and 

 more as they went on, until when they arrived in the vicinity of La Guaira 

 their numbers were beyond calculation, all the later additions to the 

 multitude taking the same direction of flight as that adopted by the 

 originators of the movement. 



Perhaps the course taken was at first an expression of positive 

 anemotaxis — a flight against the prevailing wind. But later the sense of 

 direction seems to have become so firmly fixed that they moved east even 

 v/hen in the sheltered valleys or in gorges where the direction of the wind 

 was changed. 



This is, in brief, what it was my lot to witness while in Northern 

 Venezuela; and it is much to be hoped that others who chance to be in 

 that locality at some future date will make notes of their experiences with 

 the butterflies mentioned, and prove conclusively whether this was a 

 normal condition of affairs or an extraordinary chapter in the history of 

 insect life in this region. 



-o' 



NEW APOIDEA FROM MONTANA. 



BV AUSTIN W. MORRILL, PH. D., MASSACHUSETTS AGRICULTURAL 



COLLEGE, AMHERST, MASS, 



BombiiS Cooieyi, n. sp. — ?. Length, 16-17 r""^- Integument 

 black ; clothing black, yellowish white, pale ochreous yellow and rusty 

 yellow. Head, seen from in front, about as wide as long. Malar space 

 about one-sixth the length of eye. Third segment of antenna one-half 

 longer than fourth, and scarcely longer than fifth. Face thickly clothed 

 with pale yellowish-white hair, on the sides mixed with black. Vertex 

 clothed with yellowish-white hair, which is fringed in front with black. 

 Cheeks clothed with brownish-black, sometimes slightly mixed with 

 whitish, hair. Clypeus shining, sparsely punctured, labrum fringed on 

 free edge with rusty yellow hair. Clothing of thorax above, and on sides 

 yellowish white, mixed with black in front of insertion of wings. A broad 

 patch of black between the wings surrounds the smooth, polished 

 mesothoracic disc and extends back in a point over the middle of 

 metathorax. On each side of metathorax is a tuft of yellowish white hair. 



