COLLEMBOLA OF MINNESOTA 59 



mucrones. The animal has a white ground color, sometimes 

 varying to a yellowish or grayish tone. Almost the entire upper 

 part of the body shows dark spots of various forms and dark- 

 blue color, which often varies to a sky-blue. Antennae dark 

 blue. Legs with distal half of tibia white. Furcula pale violet, 

 and the ventral side of the animal clear white." 



Schott described the species from three specimens taken in 

 California. He distinguishes it from P. marmoratus Packard 

 by its having but two inner denticles to the superior claw. On 

 examination of a large series, however, I am led to conclude 

 that there may possibly be a mistake here, for while some show 

 the inner edge of the claw smooth, others show quite a decided 

 notch near the base, amounting, indeed, almost to a tooth. Hav- 

 ing but three specimens, Schott may have had no opportunity 

 to see this notch. There is, moreover, the possibility that Min- 

 nesota specimens would show a gradation between those found 

 in Massachusetts or Maine, and those from the Pacific coast. 

 Packard mentions no tooth on the inferior claw, however, so the 

 species are probably distinct. 



I have often taken this species with S. minnesotensis, and 

 the two resemble each other very greatly in coloration. Evi- 

 dently the species is well distributed throughout the state, as 

 it has been taken along the Mississippi from St. Paul to the 

 Iowa border, as well as in the Vermillion Lake region in the ex- 

 treme northern part of the state. 



Papirius unicolor Harvey. 



1893. Papirius unicolor. Harvey, "A new .Papirius." Ent. News, IV, p. 

 65. PI. IV. 



"Light brownish purple throughout ; color much like that 

 of a Delaware grape with the bloom removed. Back, ends 

 of the legs and apical half of the antennae darker. Dorsum often 

 with two interrupted stripes of darker shading. Head, base of 

 antennae, base of legs, spring and ventral surface lighter; one 

 specimen had the two terminal segments of the antennae con- 

 spicuously clear. Young, half-grown specimens, and full-grown 

 specimens in damp situations paler. Occasionally a very large 

 specimen and those taken in dry places are more brown, but all 



