A. C. OUDEMANS. ACARI. 



IL 



DESCRIPTION OF THE NEW SPECIES. 



Seiulus novae-guineae Oudms. 



(Plate II, fig. i — il). 



1905 May 1. Seiulus novae-guineae nov. sp. OUDEMANS in Entomologische Berichte, 

 n°. 23 p. 222. 



Patria: New Guinea (Jamûr). 



Fourni on 6 August, 1903, by Mrs. de Beaufort and Lorentz. 



Female (Fig. 1 — 11). Length 513 — 524^. Colour light brown-straw-coloured, like our 

 Seiulus muricatus (BerL). Sliape the usual of Seiulus, oval, top forward, scarcely constricted 

 above legs II, not really shouldered. Texture little scales on the shields, smooth on the legs, 

 finely wrinkled in the weak parts. 



Dorsal side (Fig. 1) wholly protected by a shield which anteriorly is contiguous to the 

 dorsal parts of the peritrematic shields, and which on both sides and just behind the spots 

 where the peritrematic shields become dorsal shows a short transverse line or démarcation, 

 or low ridge. Hairs: two vertical bristles directed forward; next to thèse a pair of minute 

 hairs directed backward ; and next to thèse, but a little more backward a pair of small hairs 

 directed forward. Behind the spots where the peritrematic shields become dorsal, and before 

 the transverse lines a pair of minute hairs directed outward. Two somewhat wavy submedian 

 rows each of 12 bristles; two sublateral rows on each side of about 9 (the outer rows) and 

 5 or 6 (the inner ones) bristles. Quite on the latéral edge a row of 12 bristles on each side, 

 of which the two posterior ones are stronger than the other ones. Ail thèse bristles are 

 smooth and not quite sharply pointed (Fig. 3). 



Ventral side (Fig. 2). Tritostemuni (mentum, Bauchtaster) (Fig. 8) with rather long 

 smooth basai pièce and two fîat feathered slips which are mère prolongations of the basai 

 pièce, showing no démarcation at ail. Sternal shield long, reaching the line of the centres of 

 coxal foveolae III, anteriorly very convex and hère medianly slightly excavate to receive the 

 base of the tritosiernum (Fig. 8), widened to a triangular point before foveolae pédales II and 

 behind thèse, very deeply excavate posteriorly, provided with the usual three pairs of sternal 

 hairs of which the first pair submedian, the second and third pair submarginal. Metasternal 

 shields very small, round, each bearing its metasternal hair. Génital shield long; its anterior 



