THE GENERA AND SPECIES OF SYMPHYLA. 27 



j3. The seta3 on the cerci moderately numerous or few, the 

 most distal ones at least about two thirds as long as the 

 depth of the cerci. 



§. The cerci with moderately numerous sette and the distal 

 ones somewhat shorter than the depth of the cerci. The 

 metatarsus of the last pair of legs with four setae in the 

 anterior dorsal row, and these setfe scarcely half as long as 

 the depth of the joint . . 6. S. plebeia, n. sp. 



§§. The cerci with few setae and some of the distal ones 

 longer than the depth of the cerci. The metatarsus of the 

 last pair of legs (at least in small specimens) with two sette 

 in the anterior dorsal row, and these seta? only a little 

 shorter than the depth of the joint . 7. S. nivea (Scop.). 



h. The second scutum with the antero-lateral sette not 

 longer, often considerably shorter than a lateral pair, which 

 also are directed outwards and generally besides somewhat 

 forwards. 



a. The second scutum with the hind margin slightly 

 convex in its middle half, and without vestige of angles. 



§. The metatarsus of the last pair of legs with the distal 

 dorsal setae long, and one of them at least as long as the 

 depth of the joint ; the tarsus with some of the dorsal sette 

 as long as the depth of the tarsus. The cerci at most five 

 times longer than deep . 8. S. chilensis, n. sp. 



§§. The metatarsus and tarsus of the last pair of legs with 

 all sette rather short. The cerci more than five times longer 

 than deep . . . 9. S. capensis, n. sp. 



13. The second scutum with the hind margin rather deeply 

 emarginate, and the lobes on each side posteriorly angular. 



10. S, angulosa, n. sp. 



Species of Group III. 



a. The second scutum with the hind margin deeply 

 emarginate and the emargination angular in the median line ; 

 its antero-lateral setae only nearly as long as the breadth of 

 the proximal antennal joints. The last pair of legs with none 



