69 



( Sternal shield trapezoidal . . . .4. 



I Sternal shield linear L. sylviarum (Can. et Fanz.) 



Dorsal shield wide, occasionally sur- 



rounded by narrow margin of un- 



protected skin 5. 



Dorsal shield narrow, surrounded by 



unprotected hairy skin . . . .6. 

 Coxa 2 with two spines, one for- 



ward and one backward; coxae 3 



with 2 spines backward . . . L. albatus (C. L. Koch). 

 Coxa 2 with one spine forward . L. corethroproctus Oudms. 

 Dorsal shield without constriction in 



the middle; peritrema reaching 



coxa 2 L. lacertarum (Contar). 



Dorsal shield with constriction in the 



middle; peritrema passing coxa 1 L. saurarum (Oudms.). 



19. Subfamily Spinturnicinae. 



The principal characteristic of this subfamily has always been 

 the dorsal situation of the stigmata. This characteristic does not 

 exist, as at least one of the species even of the genus Spinturnix 

 von Heyden has ventral stigmata, as I will prove in a subsequent 

 paper on Acari. 



Therefore the diagnose of the subfamily should be: Body 

 generally short and oval; abdomen generally very small; legs 

 generally short and thick, sternum generally surrounded by the 

 coxae; dorsum generally protected by only one shield, ventral side 

 by two or more shields ; stigmata generally dorsal ; anal shield 

 generally without cribum ; no mentum. 



As you will observe the only fundamental difference between 

 Dermanyssinae and Spinturnicinae is in the presence or absence 

 of the mentum. 



What seems rather strange, Kolenati has — as far as I 

 know — only once mentioned the stigma and the peritrema ! In 

 Vol. 35 of the Sitzb. d. math. naturw. Cl. d. Kais. Akad. d. 



