tuTlTTÌICTl NOTKS ON ACARÎ. 125 



is l)road pyriform , with its top directed towards te mouth. At its 

 top is the genital aperture. Six small bristles on the shield , behind 

 the shield 7 rows of small bristles , two of four, and five of Si bristles ; 

 one post-anal bristle. First, second an third coxae with two small 

 bristles eacli , fourth coxa with one bristle. Between the 2d and 3d 

 coxae we observe, quite on the side of the body, the end of tlie 

 peri trema. 



NympJia {frifonpnpJia'ì) ç, certe generans ! Dorsal face. {^\^. ^^.^ 

 The shape of the dorsal shield is more oval but shows exactly lite 

 same disiribiUion and number of round sjjots aiid pores ! It is sur- 

 rounded by bristles, placed exactly as in the male. Compare fig 32 

 with 34. Only the hindmost two bristles are longer , and the six 

 hindmost bristles are more remote one from another than in the 

 male. The peritremata don't run so near the shield , as in the male. 



Ventral face (fig. 35). The ventral shield is nearly rhombeous, 

 with an acute angle forward and a blunt one hindward , with a 

 scaly marking, and with 8 bristles. Further the ventral surface 

 shows 10 pairs of bristles symmetrically arranged; one small post- 

 anal bristle. The two hindmost bristles are longer than in the 

 male. The abdomen is larger than in the male, swollen, and 

 contained a large egg. The bristles on the coxae are the same as 

 in the male. Between the 2d and 3d coxae the peritremata are 

 visible, running a very little inward. 



The hairs, both of the ^ and $ nymphae are as if built from 

 superposed small cylinders (fig. 36). 



Why do I call these S and j nymphae générantes ? Because in 

 one of my so called males I saw another feleripes Ì Consequently 

 this male was just changing its skin ! The hairs of the dorsal face 

 of this mature tnale (fig. 37) were exactly corresponding in number 

 and place those of the nympha, and all turned over the dorsum, 

 towards the centre. The hairs of the legs however were all directed 

 towards the claws. The most striking fact, however, is, that the 

 ten hairs which surround the two foremargins of the dorsal shield 

 in the adult are shaped quite otherwise than in the nympha ! They 

 are short, flat, lanceolated, and their margin denticulated (fig. 38). 



