COLLEMBOLA OF MINNESOTA 75 



Entomobrya clitellaria n. sp. 

 PL XV. 



Color brownish yellow with the exception of Th. Ill, Al)cl. 

 I, II and the dorsal part of III, the cephalic margin of Th. II, 

 and the dorsal aspect of Th. I, the eye spots, and a connecting 

 patch which also forms a ring at the bases of the antennae ; 

 all of which parts are very dark blue in color, appearing black 

 in life to the unaided eye. The antennas are tinged with dusky 

 bluish-black at the distal ends of Ant. Ill and IV, and at the 

 proximal ends of III. The dorsal part of the head between 

 the eye spots, just caudad of the heavy dark connecting spot 

 between the two rings at the bases of the antennae is light pur- 

 plish. The color description is given rather fully because I 

 believe this is a species varying but little in coloration. Very 

 young individuals have the dark parts rather lighter than those 

 which are mature, yet are so plainly marked that one readily 

 recognizes even them with the unaided eye. The dark region, 

 taking in the metathorax and the first three abdominal segments 

 (on the dorsal side) looks very like a saddle, hence the specific 

 name. The antennae have the three ultra-basal segments sub- 

 equal in length, the basal one shorter and stouter. Legs rather 

 long, each tibia bearing one clavate hair. The superior claw 

 is armed with two well-defined teeth on its inner edge, and one 

 small one on the outer edge. The inferior claw is rather slender, 

 attaining its greatest width near its distal end. The furcula 

 is as usual in the genus, it reaches forward to the ventral tube. 

 The dentes is as usual, serrate beneath, and the mucrones has 

 the typical three-toothed structure. The long hairs on the dis- 

 tal end of dentes reach a very little beyond the tip of the mu- 

 crones. Abd. IV five times as long as III. This species was 

 taken in the pine woods in the northern part of the state. Some 

 individuals were taken on the camp tables, where they were 

 running about apparently in search of food ; but the favorite 

 haunts were under and among the loose scales of bark of the 

 standing Norway pines (Pinus resinosa) where they were fairly 

 abundant. 



