166 



THE CANADIAN ENTOMOLOGIST 



CANADIAN MYRIOPODS COLLECTED IN 1882-1883 BY J. B. 

 TYRRELL, WITH ADDITIONAL RECORDS. 



BY RALPH V. CHAMBERLIN. 

 Museum of Comparative Zoology, Cambridge, Man. 



Among material sent to me for identification from the Canadian Geological 



Survey is a small collection made by J. B. Tyrrell in 1882-1883 which is of much 



interest in containing a new Scytonotus from British Columbia, a new Conotyla 



from Alberta and a new Parajulus. In addition to the forms collected by 



Tyrrell, some other species collected by F. Johansen in 1917 and 1918, one 



taken by J. A. Salter and one by R. Wells are also here listed. 



Chilopoda. 



1. Geophilus rvibens (Say.) 



One specimen taken at Ottawa June 3, 1882, by Tyrrell. 



2. Lithobius forficatus (Linne.) 



Specimens taken at Ottawa in 1917 and 1918 and on St. Joseph's Id., 

 Ontario, Sept. 3, 1918, by F. Johansen. 



3. Sonibius politus (McNeil.) 



One specimen taken at Ottawa, June 3, 1882, by Tyrrell. 



DiPLOFODA. 



4. Polydesmus serratus (Say.) 



One male taken by R. Wells in 1883 on Gaspe Penninsula, Quebec, "in- 

 terior," and others at Ottawa and Chelsea, summer of 1918, by F. Johansen. 



5. Scytonotus columbianus, sp. nov. 



At once separable from S. hergrotJii Chamberlin, known from Bremerton, 

 W^ashington, in its obviously smaller size, which approaches more nearly that 

 of 5. granulaiiis Say. As in the latter species the colour is horn brown with a 

 tendency toward reddish. The female may be distinguished in having the 

 keels of the eighth and ninth segments of normal size or very nearly so, not 



absent or nearly so. The male differs in the details of 

 the gonopods, the anterior prong, e.g., in lateral view 

 appearing more slender and finely tapered and curv- 

 ing much farther beyond the end of the posterior branch, 



l<"ig. 1(). — Scytonotus columbianus, 



sp. nov. Gonopod of male, 



right side, cctal view. 



Fig. 17. — Conotyla albertana, sp. nov. Gonopods 

 of male, anterior view. 



which also differs in details (see fig. 16). Correlated with the normal develop- 



June, 1920 



