23 



Male. — Length of the dorsal shield 500—540 p., of the body 

 504—590 ^. — Colour like straw. — Dorsal side (Fig. 20) 

 protected by one dorsal shield, sinuated outward above the rostrum 

 and the legs 1 and 2, with almost parallel sides, rounded posteri- 

 orly, without auy structure, with two median broken rows of small 

 hairs and two lateral rows of longer hairs, viz. five on each 

 shoulder, one above leg 4 and three pairs on the rounded posterior 

 margin. The soft unprotected part of the dorsum is white, wrinkled 

 parallel to the margins of the shield, and provided with 4 pairs 

 of long hairs posteriorly, and two exactly on the posterior margin, 

 which is sharp (Kolenati's Kleberand). — Ventral side (Fig. 21). 

 The sterni-geniti-ventri-anal shield is wicle, wider than in any 

 other known species of Liponyssus. The hairs on the unprotected 

 portion of the belly are rather long. Legs. Coxa 2 bears a sharp 

 spine directed forward and a second ditto directed backward, 

 whilst coxa 3 has three spines, of which two are directed back- 

 ward and one outward. — Mandibles (Fig. 22) almost toothless. 

 Yet the fixed finger has a rudiment of a cheek-tooth and the 

 movable one two rudiments of incisors. 



Female. — Lengtli of the dorsal shield 560 ,a. ; of the body 

 570 to 600 p. — Colour like straw. — Shape broad oval, with 

 top backward, but when the animal is well fed the top of the 

 egg is directed forward. — Dorsal side (Fig. 23) protected by 

 one shield, sinuated outward above the rostrum and above the 

 coxae 1 and 2 ; sides rounded, posteriorly slightly sinuated inward ; 

 quite posteriorly rounded ; without any structure, with all the hairs 

 of about equal length. The unprotected part of the body white, 

 wrinkled parallel to the shield, with about 5 pairs of hairs. — 

 Ventral side (Fig. 24). There is a distinct trapezoidal sternal shield, 

 nearly straight anteriorly, excavated deeply posteriorly, provided 

 with three pairs of hairs. The genital shield, which is apparently 

 a geniti-ventral one, oval or elliptical. The skin between sternal 

 and genital shields radiates strongly. Anal shield large, oval, with 

 top backward. On the sides of genital and anal shields about 13 

 pairs of hairs. — Peritrema, epistoma, liypostoma and legs like 



