(dr. a. c. oudemans) notes on acari. 137 



Dorsal side (Fig. 26) protected by two dorsal shields coalesced 

 together, like in the male, but posteriorly less pointed. The 6 

 paii's of hairs are present , but only the most anterior pair is planted 

 in the margin of the shield, and minute. Moreover the fan bears 

 a minute pair. Stigma and peritrema like in the deutonympha 

 and S, except the anterior half of it, which is sunuated and 

 longer. — Ventral side (fig. 27). The sternal shield is broad 

 pyriform, without any hair, but surrounded by 3 pairs of minute 

 hairs. Another pair of minute hairs on the level between coxae 

 3 and A. There is an indistinct, small oval genital shield between 

 the coxae 4 and provided with a pair of minute hairs. In the 

 centre of the fan a pair of minute hairs ; between this pair and 

 the anal shield two pairs of ditto ; the anal shield long and narrow , 

 with one pair of distal minute hairs. 



Habitat: Vaynpijrops lineatus Geoffr. 



Patria : Brazil. 



16. Key to the species of Periglischrus Kol. 



I The two dorsal shields free 2 

 1. The two dorsal shields con- 

 ' tiguous 5 



Ant. dors, shield pyriform , 

 çy J or oval , top forward. . 3 

 Ant. dors, shield nearly cir- 

 cular P. interruptus Kolen. 



Post. dors. sh. pyriform or 

 o ) oval, top forward ... 4 

 Post. dors. sh. pyriform or 



oval, top backw. ... P. hipposiderus Kolen. 



Î Flat portion of abdomen 

 , , not wider than body . . P. asema Kol. 

 $ Fiat portion of abdomen 



suddenly wider .... P. glutinimargo Kol. 



