110 (dr. a. C. OtTDKMANs). NOTES ON ACARI. 



peduncle of thi« comb is not longer than its teeth. The markings 

 are widely varying from those op P. siculus (Beri.); there is no 

 question of granulation ; it is striated. Four parts, resembling scales, 

 are striated transversely, and the Striaton is concave anteriorly. 

 A median feather-like marking before the 4 scales. 



Mandibles (fig. 13). The immovable finger with an incisor and 

 a dog-tooth; the latter directed backward. Between these teeth a 

 distinct sense-organ. The movable finger almost equal in length 

 and shape to the immovable one; its copulation organ exactly 

 three times longer, sabre- like. 



Maxillae. Horns of the hypostome (fig. 14) on short peduncles 

 (so-called bi-articulate), long, slender, with shorter, slenderer, inner 

 ])ranch, provided with a hyalin, iiregular membrane, slightly longer 

 than the real horn, and forming apparently pincers with this. 

 Inner malae fused on their proximal half, free on their distal one, 

 finely hairy, as usual. Lingula one and a half time longer than 

 horns, hairy as usual. — Falps (fig. 12). The trochanter (first free 

 joint) is convex ventrally and unarmed. The femur is convex 

 dorsally, has short thin peduncle, and inward a short chitinous 

 appendage and a short bristle on its inner proximal half. The genu 

 has inward and distally a short, chitinous, sharp thorn and a short 

 bristle. The tibia on its middle, outward and downward a short 

 chitinous appendage, provided with a still shorter knob and a short 

 bristle. 



Mentum (fig. 11), like in P. siculus, with short base and long 

 flagellae, reaching almost the middle of the horns of tlie hypostome. 



Legs. All the legs shorter than the body. — The coxae of the 

 first leg crooked (/> like, which is already visible on a ventral view. 

 The femur 2 (fig. 15) is provided with a large blade-like, ventral, 

 almost square appendage (fig 15 is an k«É?r aspect of the /^/?! leg 2). 

 Moreover it has on its inner side and proximally two sliort bristles 

 which are planted in a shallow excavation. Most probably this is 

 a sense-organ : I have found it on /-*. siculus (^Borl.) too. Tlie genu 

 2 and the tibia 2 both with a central knob. 



üabitat. Decaying leaves. 



