18 (dr. a. c. oudemans). new list or dutch acaui, ir. 



Stigma and peritrema wanting. 



Deutonpnpha ?. A very beautiful creature (Fig. '18). — Lengih 

 332 — 402 ;«^. — Colour very pale. — Dorsal side. The vertical 

 hairs are leaf-like, the others lanceolate. The hairs on the short 

 and thick legs are feathered for the greater part. The lanceolate 

 haii'S differ somewhat in different specimens (Fig. 19). On the 

 level between the 3d and 4th leg there is a transversal row of 

 8 hairs : in one of my specimens this row has only six hairs ; 

 no 3 and 6 being absent 



Ventral side. (Fig. 20). There is a distinct sterni-genital shield 

 and a nearly circular ventri-anal one, flanked by two lanceolate 

 hairs. There is behind the first shield already an indication of the 

 large ventri-anal shield of the adult ?. Two little metasternal shields 

 present. The j^eritreina reaches beyond the first leg. The anus is large. 



Adult Female. Dorsal side perfectly that of the deutonympha. 



Ventral side (Fig. 21). There is a large sterni-genital shield 

 which shows some peculiars : Istly there is a line running along 

 its foremost margin. 2(lly it is posteriorly wider than the dislance 

 between the 4th pair of legs, so that a part of the implantations 

 of this pair is situated under this shield. 3dly. I don't see any 

 metasternal shields. 4thly the hindmost half of the shield shows 

 a horse-shoe-shaped liglit-refracting chitinous genital apparatus. The 

 ventrianal shield is large and flanked by two lanceolate hairs ; the 

 anus is large. 



14. Key to the species of Seiulus Beri. 



Ì2 with small ventral shield between 

 genital and anal one ....%. dogenerans (Beri.) 

 ? without such 2 



I ? legs 1 thick and with strong claws.S. unguiculatus (Beri.) 

 ( Î legs 1 as slender as others . . 3 

 Dorsum with bristles, or spines, or 

 feathered, or lanceolate, or spatu- 



late hairs 4 



Dorsum with usual hairs. . . .5 



