Williston, North Dakota (Wickham) ; Mile 332, Hudson Bay R. R. 

 (Wallis). 



Under the number "400," the original of the description of 

 "Colymbetes discolor" is referred to in the Harris Note Book as having 

 been taken "in a pond May 25, 1826," undoubtedly in the vicinity of 

 the author's home in Milton, Mass. This specimen has disappeared 

 from the Harris collection and is probably no longer extant. Under 

 the same number (400) the Note Book mentions a second example 

 taken by Adams June 15, 1826 in Vermont. This specimen is now 

 in the LeConte collection and as it is undoubtedly one of the five 

 examples upon which Harris based his description I am accepting 

 it as a true representative of the species. There are only two known 

 species occurring in Eastern Massachusetts to which Harris' descrip- 

 tion applies, viz. the present species and the subfuscatus of Sharp. 

 We can never be absolutely sure which of these Harris had in hand 

 but as he says in his description "nails alike in both sexes," and this 

 applies rather better to the present species (though not strictly true 

 of either) than to subfuscatus, I feel quite confident that this course 

 is the correct one. 



A. inscriptus Cr. Trans. Am. Ent. Soc. IV, 1873, p. 422. 



Extremely close to discolor, and I am unable to give any other means of separat- 

 ing them than those named in the table. Even here a rather nice discrimination 

 is necessary, though in practice the locality label will usually aid materially. I 

 observe that in the majority of specimens of discolor examined, the sides of the 

 pronotum are very narrowly rufous or rufescent within the marginal bead, while 

 none of the specimens of inscriptus at hand show this. It is possible that this 

 character may prove to have some value in a confirmatory way. Length 6.4 to 

 7.3 mm. 



Crotch's type was from Labrador. According to Mr. Sherman* "it is 

 rather common at Hermit Lake, Mt. Washington (3,700 feet) but is 

 seldom found above the tree line." I have seen an example from 

 Sudbury, Ontario (Can. Nat. collection) and have two examples from 

 mile 332, Hudson Bay R. R. (Wallis) which I refer here. Mr. Wallis 

 also took discolor in the same locality. 



A. canadensis new species. 



Of the same general appearance as discolor, the sides of the thorax, however, 

 always with well defined pale margins, the marginal bead narrower, the elytral 

 reticulations minute and subequal throughout ; the very fine punctules more 

 numerous and more easily discernible than in discolor. The coxal plates are 

 nearly as in discolor, their distance from the middle coxae being rather less than 

 half their own length. Hind tibiae more or less punctate along the inner margin 

 in basal half or two-thirds. These punctures vary from only one or two to five or 

 six in number : they are as a rule entirely wanting in discolor. Protarsal claws 



*A List of Labrador Coleoptera. Jour. N. Y. Ent. Soc. XVIII, p. 185. 



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