28 COLLEMBOLA OF MINNESOTA 



b. — Fiircula not fanlike, lateral rows of bristles on dentes 

 rather short, mucrones broadly elliptical, ribbed. Back 

 without long bristles. Smaller claw bearing- a branched 

 hair at tip. Length i mm. penicillifer, 55. 



5. a. — Large claw enclosed in a tunic, which gives it a plump 



appearance. Ant. IV about as long as I, II and III to- 

 gether. Mucrones dentate. Length 2 mm. 



fuscus, 53. 

 b. — Large claw not enclosed in a tunic. 6. 



6. a. — ^Ant. IV little longer than III. Mucrones dentate. 



Body beautifully marbled, sparsely covered dorsally with 

 long, much-curved bristles. Length 1.5mm. 



minnesotensis, 52. 

 b. — Ant. IV about as long as II and III together. Mucron- 

 al edges smooth. Body dark, without dorsal bristles but 

 with short, fine hairs. Length i mm. 



pruinosus, 48. 



7. a. — Back set with strong, truncate bristles. 8. 



b. — Body short-haired, without bristles, often nearly naked. 



9- 



8. a. — Three or four clavate hairs present on the tibia, also 



several very long ones on the dentes. Ant. II equalling 

 III in length, each of these segments bearing a few long, 

 straight bristles. Length 1.25mm. 



longisetis, 51. 

 b. — No clavate hairs on tibia or dentes. Ant. II shorter than 

 III, long bristles not present. Length 1.25mm. 



curvisetis, 50. 



9. a. — Body black, sometimes with bluish or brownish tint, 



bearing four white spots dorso-laterally, and with two 

 small white spots mediad to the eyespots. Length i mm. 



quadrimaculatus, 45. 

 b. — Body without the four white spots. 10. 



10. a. — Body yellow, sometimes darkening to orange or olive, 



young specimens darker. Eye-spots and a frontal spot 

 between the bases of the antennae black. Length imm. 



aureus, 43. 

 b. — Body dark. il. 



