71 



The legs of the Spinturnicinae are provided with six rows of 

 hairs, two rows on the dorsal side of the legs, two lateral rows 

 and two ventral rows. The relative length of the dorsal hairs on 

 the different joints of the four legs, is a good specific characteristic. 

 Siinilarly the outer ventral row may have long hairs on some of 

 the joints, very small ones on the others. As there are two pair 

 of legs directed forward and two backward, we may speak of 

 inner and outer rows. 



As I have found back again Kolenati's Diplostaspis mystacinus 

 and a new species of Periglischrus, I have read bis paper carefully 

 and come to the conclusion, that his genera and species are easily 

 distinguished. 



20. Key to the genera of Spinturnicinae. 



!Legs 1 have the rostrum between the 

 coxae 2. 

 Coxae 1 contiguous above the rostrum 10. 



!Legs slender; mites Dermanyssus-\ïke : Ptilonyssus Berl. et Trt. 

 Legs short and thick ; mites Spin- 

 turnix-lïke 3. 



i All the legs subequal in thickness . 4. 

 ' Legs 1 as thick again as the others 9. 

 iTwo dorsal shields (in adults) . . . 5. 



' One dorsal shield 6. 



<9 with genital shield Periglischrus Klti. 



( Q without genital shield Tristaspis Klti. 



(With sternal shield 7. 



f Without sternal shield 8. 



Dorsal shield without oval central field Spinturnix von Heyden 



!(— Celeripes Mont., — Pteroptus Duf., incl. Tinoglischrus Klti., 

 and Diplostaspis Klti.) 

 Dorsal shield with oval central field Heterostaspis Klti. 



8 Only one genus Monostaspis Klti. 



9 Only one genus Meristaspis Klti. 



