A. C. OUDEMANS. ACARI. I 27 



Legs (Fig. 24). Legs I are scarcely thicker than the palps, antenniform; their coxa is 

 dorsally and distally ending in a minute pin, internally and distally ditto ; the trochanter is 

 somewhat swollen, dorsally distally and internally ending a minute pin ; the fémur is provided 

 with a minute basifemur; genu and tibia are of the usual shape; the tarsus, which I hâve 

 delineated apart (Fig. 38) is provided with a minute basitarsus, four tactile hairs and distally 

 with a mass of hairs, of which several are thick, blunt and transparent and most probably 

 not tactile but olfactoric or tasting. No paratarsus. Legs II, III and IV are much thicker. 

 Their basifemora are scarcely discernible;- the démarcations of basifemur and telofemur are 

 only indicated by an undulate groove on the ventral side (Fig. 25). The basitarsi are distinct. 

 Of the paratarsi the caruncles are large (Eig. 39) but the claws comparatively feeble. Notic- 

 eable is further that fémur II is provided with one low thornlike process on its posterior 

 edge; fémur III with three low ditto on its anterior edge and fémur IV with three larger 

 on its anterior edge and three smaller on its posterior edge. 



Habitat ? 



Remark. The présent species differs from Megisthanus liatamensis Thor in the following 

 particulars: The ratio of length and width is 100:60 (in liatamensis 100:45); the ratio of 

 length and width of the anal shield is 100 : 170 (in liatamensis 100 : 137); the greatest width 

 lies in the middle on a line with the stigmata (in liatamensis on two thirds of its length) ; 

 the space between the ventral and anal shields on one side and the metapodial shields on 

 the other side is much larger in liatamensis. The other particulars are not comparable with 

 those of liatamensis as Thorell has described and delineated this species very insufiiciently. 



Megisthanus orientalis Oudms. 

 (Plate III ; fig. 40—50). 



1905 May 1 ; Megisthanus orientalis nov. sp. OUDEMANS in Entomologische Berichte, 

 n°. 23, p. 222. 



Patria: New Guinea (Moaif). 

 Foutid June, 1903, by Mr. Lorentz. 



Female (Fig. 40 — 50). Length 2460 [/,; greatest width 1590 f& about in the middle; 

 ratio 100:65. Colour much darker brown than in the foregoing species, like that of the 

 darkest individuals of Parasitas crassipes (L.). Shape broad oval, anteriorly truncate, greatest 

 width on a line with the stigmata. Texture smooth on the hard parts, finely wrinkled on the 

 weak parts; on the dorsum there is a pore behind each hair. 



Dorsal side (Fig. 40) protected by one oval shield which anteriorly in truncate, ail 

 around surrounded by a rather narrow margin of weak skin, the narrowest posteriorly. Hairs 

 abundant, long, slightly curve, finely pectinate on the convex side (Fig. 42); in gênerai' rad- 

 iating from the centre of the dorsum, anteriorly smaller, posteriorly longer. Noticeable are 

 a bare space on the posterior end of the dorsal shield and four or five pairs of short, strong 

 curve bristles exactly on the posterior edge of the abdomen. 



Ventral side (Fig. 41). Tritosternum (Fig. 43) of the usual shape, rather short, poster- 

 iorly twice wider than anteriorly, covered with a double row of almost square scales, distinctly 

 demarcate from the long feathered slips. Jugular shield single (Fig. 41), médian, transverse, 



