(dr. a. c. oudemaws). notes on acabi. 103 



( Abdomen without wings .... 3 



( Abdomen with wings 10 



„ ( Mandibles chelate ^ 



^ Mandibles one-jointed distally serrate 9 

 All the legs crawling organs, near 



tosfether. 5 



• ] ilh pair of legs far backwards, jum- 



f ping-organs 8 



p. ( Ceph. without lamellae .... 6 



f Ceph. with lamellae 7 



i. Legs short and thick I Camisiinae. 



I Legs long and slender .... H Oribatinae. 



7. One subfamily HI Eremaeinae. 



8. One subfamily \N Zetorchestinae. 



9. One subfamily V Serrariinae. 



10. One subfamily VI Notaspidinae. 



11. One subfamily M\\ Phthiracarinae. 



Classification of Acaridae {Sarcoptidae). The Tyroijly pinnae are the 

 older, as they are free living; the remaining are parasites, thus 

 of younger date. 



Of these parasites those which live free on the body of their 

 hosts are older than the others which have burrowed themselves 

 in the body ot their hosts and therefore are siili more dege- 

 nerated. 



Of the parasites living on their hosts the Canestrlinae , which 

 parasite on Insects, are older than the lÀstrophorinae, who parasite 

 on Mammals, and these older than the Aualgesinae, who live on Birds. 

 And finally of those who mine the tissues of their hosts, the 

 Sarcopänae with transversal vulva and chelate mandibles are more 

 primitive than the Cj/todiiinae. 

 Therefore the following table : 



[ Free living; skin without parallel fine 



) ridges I TyroglypUnae. 



Parasites ; skin finely striated par- 

 allelly 2 



