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



Ventral side (fig. 2). Here we have a sternal shield of the 

 usual shape, provided with 3 pair of hairs, and an anal shield, 

 almost circular, with the usual 3 hairs and the crlhrum. Between 

 these two shields 4 pair of hairs. On each side of the anal shield 

 a hair. 



Peritrema (fig. '2). The stigma lies heJiind the coxa 4! The 

 peritrema is very short, extending scarcely the middle of coxa 4. 



Mandibles chelate, multidentate, resembling those of the trito- 

 nympha feminina. 



Maxillae, The hypostoma (fig. 4) resembles that of the trito- 

 nympha fenimina. The palps are slender (fig. 1), 



Legs. The legs are slender; leg 1 much longer than the body, 

 from 600 — 950 ;". ; leg 4 smaller, leg 2 and 3 almost equal in 

 length and as long as the body. 



Epistoma (fig. 3) quite different from that of the tritonympha 

 and adult, viz. almost trapezoidal with denticulated free edges. 

 The front-edge with 3 large cusps: one median and two lateral 

 ones. The intermediate denticulations may however grow some- 

 times larger so that the front-edge is liable to many variations. 



Beutonywpha. Length from 600 — 900 i>-. — Colour pale. — 

 Shape more resembling that of the tritonympha. — Texture. The 

 shields scaly; scales more distinct than in the prolonympha; un- 

 protected skin finely wrinkled. — Dorsal side. There are /wo shields. 

 The anterior about two times longer than the posterior one. Both 

 the shields with about 20 pair of hairs; the unprotected margin 

 is hairy too, but the hairs a little smaller and all directed backward 

 and bent inward; in this respect strongly remembering of the 

 tritonympha. The two small shoulder-hairs as usual directed outward 

 and gently bent forward. 



Ventral side. Sternal and anal shields like in the protonympha. 

 Between these shields a row of 5 pair of hairs ; moreover the belly 

 with 13 — 18 pair of hairs. 



Peritrema. The stigma lies a little before the level of the middle 

 of coxae 4. The peritrema reaches the anterior edge of the body, 

 beyond coxae 1. 



