(db. a. C. OTTDEMANS). NEW LIST OF DUTCH ACAKI, II. 15 



The female's palpi lack on their first article the transparent 

 laminula , observed in Lipoiiyssus musculi (G. L. Koch), and there- 

 fore , this character not being common to all the species of Li- 

 ponyssus, must be removed from the characters of the genus (vide 

 Berlese, Ac, Myr., Scorp. Ital 53, n°. 9). 



The coxae are armed perfectly as in the males (vide supra). 



10. Liponyssus corethroproctus Oudms., nov. sp. 

 (With Plate 1, fig. 9—14). 



Male. Length 450 — 600 ,u. — Colour yellowish white. — The 

 dorsal side (Fig. 9) is protected by a dorsal shield which ends 

 posteriorly in a free blade, which ends itself in four chitinous 

 apophyses, each bearing a strong chitinous spine. Beneath each 

 apophysis there is a second spine, which sometimes is visible next 

 to the apophysis or next to the spine of the latter. Over the 

 dorsal shield are scattered a few regularly and symmetrically ar- 

 ranged little hairs, as shown in my figure. Behind the free blade 

 the soft abdomen bears several strong spines , forming a broom , 

 xoQtj&fjov. The abdomen has a median incision. 



The ventral side (Fig. 10) is protected by a sterni-genital shield 

 and by a ventri-anal one, the lateral contours of which I could not 

 distinctly discern. This latter shield is flanked too by a hedgehog- 

 like mass of spines, much shorter and more sharply pointed than 

 tliose of the broom, which of course is visible too , when the animal 

 is seen from the ventral side. It seems to me that the anal shield 

 projects freely beneath the incision of the abdomen. The male's 

 peritremata are short ; they end forward on a line with the genital 

 aperture. 



The legs are normal ; the fourth pair bears strong bristles. 



The chelae bear a long curved transparent appendage (Fig. 11). 

 I have drawn two chelae, a, seen from aside, and b seen from 

 above. The fingers have no teeth. 



Female. Length 500 to 675 f^ — Colour y elio wish- white. 



