36 A. e. OUDEMANS, NOTES ON ACARI. 



before this, a little more outward, with a nearly S— shaped 

 ditto ; still more forward and outward with an enormous 

 almost triangular, sharp chitinous appendage, which is also 

 discernible on the dorsal aspect (fig. 18); in the middle with 

 a thick curved hair, directed inward; before this, on a low 

 knob, a stiff, more or less rod-like hair, also directed inward 

 and forward; finally distally and outward with a knob. The 

 femur outward has a bristle and inward a knife-shaped hair, with 

 the sharp edge forward and the blunt edge with two sharp 

 teeth or bristle-like appendages. The genu shows inward the 

 known knife-shaped hairs. Tibia and tarsus normal. The palps 

 are tapering slightly. 



Legs (fig. 18) slender, resp. about 1675, 1065, 1220 and 

 1830 fj.. All the hairs are spiny bristles, except on tarsus I. 

 Leg II not unusually thicker than the other ones. Femur II 

 (fig. 27 and 28) like the other femurs with distinct basifemur, 

 and ventrally with a thumblike protiiberance, acompanied by 

 4 knobs (fig. 28). Genu II ventrally with a lens-shaped pro- 

 tuberance. So too tibia II. T a r s u s IV (fig. 29) distally with 

 two ventral and two dorsal short but strong spines, and with 

 a pair of rather short supra-praetarsal (sense ?) hairs. P r a e- 

 tarsus IV (fig. 29) short, wide, with well developed claws, 

 tw^o heart-shaped supra-unguinal sticking-pieces and a sub- 

 unguinal caruncle like an inverse flying bat. 



Female. Length 1425 — 1560 /ca. Shape elliptical, but, 

 when swollen, oval, with top forward, often constricted in the 

 middle, scarcely shouldered behind legs II, better shouldered 

 before legs I. Colour brown. Texture scaly in the 

 shields, finely wrinkled in the unprotected parts, more or 

 less leathery, never well chitinized. 



Dorsal side (fig. 30) protected by two shields. The an- 

 terior one 705 |W long, almost trapezoidal, wider posteriorly, 

 with rounded sides and angles. Posterior shield 555 i^ long, 

 semicircular, anteriorly straight, if not a little concave. Between 



