THE CANADIAN ENTOMOLOGIST. 201 



Upon finding that Cockle's species agreed In every respect with 

 Absolon's description, I sent specimens and drawings to Absolon, in order 

 to determine wliether the two species were the same. He informed me 



that they were not ; that his species was always white, and not so slender 

 as the yellow one ; and he sent me eight specimens of his cave species, 

 from which to draw my own conclusions. 



I agree with him that tlie two species are distinct. They are sharply 

 separated by striking differences in colour and form, and by less striking 

 but not less constant differences in the antennal organs and the clothing. 

 In sibirica, Tullberg-Absolon, the lobes that constitute the antennal organ 

 are slender and finger-like — quite unlike those of Cocklei. In sibirica, 

 T.-A., the minute curved set?e of the body are few ; in Cocklei they are 

 numerous, and interspersed with longer and stiffer set« ; and the 

 arrangement of the setae is conspicuously different in the two species, as is 

 indicated in Figures 8 and 9. 



Since the golden snow-flea refuses to take the name of sibirica, we 

 must give it a new name ; and it is appropriate, as Dr. Fletcher suggests, 

 to name this eneigetic entomological inhabitant of British Columbia after 

 Mr. J. W. Cockle. 



Four hundred and ninety-nine types, Kaslo, B. C, Jan. 31 and 

 March, 1906; Feb. 23, 1908; J. W. Cockle. Many of the types have 

 been sent to the U. S. National Museum, Washington, D. C, and to the 

 Museum of Comparative Zoology, Cambridge, Mass. Others will be sent 

 to specialists in this order of insects. 



Plate 5. 

 A. Cocklei. — Base of left antenna, x 200. 



Postantennal organ of right side, x 1234. 



u u (( a (c 



Right antennal organ, x 823. 

 Dorsal pseudocelli, x 43. 

 Right anal spine, x 400. 

 Left foot of first pair, x 400. 



Fig. 8. A. Cocklei. — Setae near median dorsal line of metathorax, 



X 300. 

 Fig. 9. A, sibirica. — Setae near median dorsal line of metathorax, 



X 300. 



