140 THE CANADIAN ENTOMOLOGIST 



long and unequal. First joint of hind tarsus equal to the following three. 

 Length (.24 inch) 6 mm., width (.12 inch) 3 mm. 



Type and paratype in the author's collection, collected at Cranbrook, 

 British Columbia, July 12, 1919, and May 14, 1919, by Mr. C. B. Garrett. 

 Four other paratypes of the same lot were studied, three from Cranbrook and 

 one from Crow's Nest, B.C., secured between April 17, 1915, and May 14, 1919. 

 Two of these are in the collection of C. B. Garrett, one is deposited in the collec- 

 tion of the California Academy of Sciences, and one in that of Dr. E. C. \'an 

 Dyke. Taking the entire series into consideration the length varies from 6-7V2 

 mm. The carination of the mesosternum in two of the specimens was less 

 pronounced than in the others, but nevertheless distinct. 



This species has the form and general appearance of A. aleitkisyar. ursinus 

 Motsch., and probably has been confused with it in collections. The long and 

 unequal fimbriation of the hind tibiae and thecarinate mesosternum, however, 

 serve to easily distinguish this from ursinus as well as from other black, shining 

 species. According to the characters given by Dr. Horn* this would lit into 

 Group 1-b with rubeolus, stercorosns, and the more recently described troglodytes 

 and campestris, from which it is easily distinguishable, having an entirely dif- 

 ferent facies, colour, size, etc. An examination of boreal and Alaskan material 

 in the cabinet of Dr. \'an Dyke was made and no form parallel in structure 

 could be found. 



A key to this Group 1-b revised to date follows: — 



1. Smaller — 3-5 mm.; above not black, varying in colour 2 



— Larger — 6-7'/2 mm.; more robust; black, head tuberculate; posterior 



tibia? stout; sides of thorax with large and small punctures. British 

 Columbia A. canadensis, sp. nov. 



2. Posterior tibiae stout; first joint of hind tarsus not as long as the next 



three; head not tuberculate; 3'/2~5 mm. Middle States to Missouri 



Texas, also rare in Massachusetts A. rubeolus Beauv. 



• — Posterior tibiae rather slender 3. 



3. Sides of thorax with, large and small punctures intermixed; 3'/2~4'/4 mm. 



All east of Mississippi and north to Dakota A. stercorosus Mels. 



• — Sides of thorax finely punctulate, without coarse punctures 4 



4. Elytral intervals smooth; head and thorax reddish or pale chestnut brown; 



elytra brownish yellow. 3 mm. Sarasota, Fla. From beneath cow 



droppings " A. campestris Blatch. 



Elytral intervals with sparse fine punctures; colour honey yellow or reddish 

 yellow. 3-3.8 mm. Crescent City, Fla. From tortoise 

 burrows A. troglodytes Hubbard. 



Mr. Garrett, to whom I am indebted for m>' specimens of A. canadensis, 

 says that it is found rather abundantly at Cranbrook, which is in the south- 

 eastern part of British Columbia. 



Of the five species mentioned in the key to the group A . campestris Blatchley 

 is the only one I have not examined. The characters given in the table will 

 serve to separate it from A. troglodytes Hubbard, although the punctuation of 



*Dr. John Horn, Monograph of Aphodiini of U. S., Trans. Amcr. Ent. Sor., Vol. 14, 1887, 

 pp. MIO. 



