COLLEMBOLA OF MINNESOTA 57 



the back, hardly well enough defined to be called banded. The 

 specimen measures I mm., which is somewhat larger than those 

 described. Possibly further collecting will prove this a distinct 

 American variety. 



Sminthurus spinatus MacG. 

 PI. IV, Figs. 1-8. 



1893. Smynthurus spinatus. MacGillivray, Canad. Ent. XXV, p. 127. 



1894. Smynthurus spinatus. MacGillivray, Canad. Ent. XXVI. p. 109. 



This singular ispecies is thus described by MacGillivray: 

 "Olive, tinted with purple, lighter on the sides, olive around 

 the mouth and eyes ; coarsely and sparsely punctate, punctures 

 light olive, each bearing a white hair. Antennae purplish, basal 

 joint lighter, as long as the body; apical segment with from 17 

 to 20 subsegments. Abdomen fuscous with lighter spots ; the 

 apical part with an olivaceous cloud, the remainder fuscous 

 with whitish or olveaceous blotches ; on the middle of the back 

 a number of groups of circular white spots, and on the posterior 

 part of each side a row of white spots, varying from four to 

 ten. Underneath olive. Anal papillae large, distinct, with nu- 

 merous bristles ; the upper part and the sides purplish or fus- 

 cous, the remainder olive with darker spots. Legs long and 

 slender, purplish or fuscous, mottled with variously formed olive 

 or whitish blotches ; apex of the tibiae and base of the larger claw 

 blackish purple. Claws long and slender, inner claw indistinct; 

 apex of the tibiae with a few clubbed hairs. Spring long, broad 

 and flat, reaching the mouth ; second joint broad, each side with 

 a row of long, stiff bristles ; bristles twice as long as the spring 

 is broad; third join long, broad, bluntly rounded. Length, 2 

 mm. Habitat, Ithaca, N. Y. 



"A very variable species, in young specimens the back is 

 pea-green, and in some specimens there is a broad olive band 

 down the middle of the back. The color varies from pea-green 

 to purplish and fuscous. Collected on the surface of standing 

 water. Ihe species can be easily recognized by the row of stiff 

 hairs on each side of the spring." To the above description a 

 hitle might, perhaps, be added. 



The species is evidently an American relative of Tullberg's 

 S. novemlineatus, which it very much resembles. In coloration 



