202 A. e. OUDEMANS, NOTES OX ACARI. 



hues. Shape elongate, widest between legs II and III, then 



becoming slowly narrower till behind legs IV ; then equal in 



width. But the creature is capable to bent its lateral shields 



ventralward, and then it becomes narrower ; or to plane them 



dorsal ward, and then it becomes wider. Also it may shove the 



anterior part of the body within the posterior part (like a 



spying glass, as shown in my figure) and then it becomes 



shorter ; or it may extend its body, so that a rather wide 



band of weak skin appears between the anterior and posterior 



shields, and in this instance it is of course still longer. The 



posterior incision or excavation (Fig. 7) is lo; ger than wide, 



almost hexa' gular (if you think it shut post riorly) ; it is 



provided with a hyaline membrane all around. Also behind the 



horns a threelobed hyaline piece, cf which the inner lobe is 



almost square, the two hindmost triangular. Texture 



polished on the shields ; finely wrinkled on th'^ week parts. 



Dorsal side (Fig. 5). Margins of anterior part of body 



strongly chitinized, dark brown. Lateral margins of body behind 



legs IV ditto ; these dark brown bands are lengt'^ened straightly 



forward till about trochantere III. Anterior shield 



occupying the whole space witbin t e dark anterior margins, 



except behind legs II. Between the anterior and posterior 



shields there is an unprotected band of skin which, however, 



may disappear, as the creature is capable to shove its anterior 



body within the posterior one (like a spying-glass), as is 



shown in my figure. The posterior and the two lateral 



sh'elds moreover occupy the remaining dorsum, except a narrow 



space between these three shields. Hairs: no vertical hairs ; 



on the rnterior shield a pair of long hairs near trochanteres 



II as long as the width of the shield ; and a pair of minute 



hairs inside of the long ones. On the later.J shields a pair of 



minute hairs close to the anterior edge, and a pair of long 



hairs about as long as the shields before trochanteres III. 



These are the lateral hairs, which have hecome dorsal as the 



