COLLEMBOLA OF MINNESOTA 55 



under side of the tip of the tibia, bends up into, or beside the 

 superior claw. There are no tenent hairs on the tibia. The 

 inner claw is slender, and bears, near its tip, a hair which 

 slightly over-reaches the superior claw. 



The ocelli are about equal in size, and are situated on a 

 black patch. The legs and furcula are brown. Several long 

 hairs are borne by the dentes, their ends very slightly clavate, 

 fig. I. The mucrones is grooved, truncate at th€ end, serrate on 

 the inner edge, and smooth with the exception of two or three 

 teeth on the outer edge. I believe this is the only species in which 

 the anal appendages have been noted heretofore. Both Tull- 

 berg and Lubbock have figured them, and the latter remarks: 

 "At the base of the spring are two scirnitar-shaped organs 

 which appear to be hairs specially modified and of unusual size. 

 The apical half of the inner margin and a small part of the outer 

 edge are roughened by irregular teeth ; which, however, are so 

 unsymmetrical as to suggest the idea of the borders being fretted 

 by use. The two scimitars often differed considerably in the 

 extent to which they were thus affected. "They arise from 

 slight papillae and bend outward and upward in a wide curve. 

 The tenaculum is (hrected backward as usual and appears rather 

 pointed from a side view, fig. 3a, truncate when seen from the 

 lower surface, fig. 3b, bearing on each side three lobe-like pro- 

 cesses which project backward. On the tip are a few hairs. 

 The genital papilla is prominent, and is situated beneath the 

 base of the small abdominal segment, fig. 2. Its opening is 

 horizontally slit-like. Length, 2 mm. Not very common. Fovuid 

 imder boards in a low, damp meadow. 



Sminthurus penicillifer Schafif. 

 PI. IV, Figs. 9-12. 



1896. Sminthurus penicillifer. Schaffer, Coll. v. Hamburg, p. 211. 



PI. I, 7; and IV, 117-119. 



1897. Sminthurus penicillifer. Poppe & Schaffer, Coll. v. Bremen, p. 272. 



Schafifer gives the following description of this species : 

 "Color yellowish. Abdomen marked above with two broad, 

 dark-blue, longitudinal spots. Sides of the abdomen each with 

 a dark-blue, longitudinal band. This dark-blue color also broad- 



