212 A. e. OÜDEMANS, NOTES ON ACARI. 



Mandibles (Fig. 1 5), seen from above, triangular and 

 narrow. 



Maxillae (Fig. 16) normal. A little knob in the throat. 



Legs (Fig. 15) normal in thickness, shorter thun the 

 greatest width of the body ; legs IV passing with their 

 caruncle the posterior edge of the abdomen. Caruncles large, 

 circular with distal point. 



Male (Fig. 17). Length: 320 ^ without mandibles and 

 horns of abdomen ; 432 with mandibles and horns of abdomen. 

 Colour light brown with dark brown markings. Shape 

 short; its greatest width a little before the legs HI on aline 

 with the ventrilateral hair (which has become dorsal), then 

 tapering backwards ; finally behind legs IV suddenly becoming 

 equal of width (with parallel sides). Incision (Fig. 19) wider 

 than long ; almost circular, only above the suckers a little 

 convex; at all events the outlines of the incision do not have 

 the general outlines of a hexangle like in Ft. /jambettae. The 

 whole incision is provided with a hyaline membrane. The part 

 of this membrane that belongs to the horns is formed just as 

 in Pt. tringae. Texture smooth in the shields; finely 

 wrinkled in the unprotected parts. 



Dorsal side (Fig. 17). Anterior part with dark brown 

 margin. Posterior part (with parallel sides) also with dark 

 brown margin ; this dark chitinization lengthens almost straight 

 forward, and when it has reached the lateral convex edge 

 of the posterior shield suddenly bends inward a short 

 distance. Excretory glands dark. Anterior shield 

 almost occupying the whole space within the dark anterior 

 margins ; posteriorly straight, not widened here behind the 

 legs II. Behind this shield there is a wide transverse baud 

 or space of unprotected skin. Posterior shieM anteriorly 

 straight, then the lateral edges run convex towards trochau- 

 teres IV. Lateral shields leaving a narrow band of 

 unprotected skin between them and the posterior shield, having 



