ACARINA FROM THE JUAN FERNANDEZ ISLANDS 



579 



The hypostome is triangular with rounded posterior margin and half 

 wider than it is long, finely punctured and with two hairs. The maxillae pro- 

 ject backwards to the posterolateral angles of the hypostoma; of the usual two 

 pairs of hairs one is straight and inserted halfway between the palps and 

 the median edge, the other pair is very small, curved and inserted near the 

 median edge far forwards. 



Ventral side (fig. 50). Epimera I---III not running at right angles to 

 the sternum but directed a little forwards, with the sutures between epimera I 

 and II and between II and III narrow and forming even curves forwards. 

 Posterior margin of epimera IV thickened to a ridge, the median half of which 

 has 3—4 rounded, knob-shaped teeth. Epimera I, II and III with resp. 3, 2 

 and 3 hairs of which the lateral ones of epimera I and III are much longer 



Figs. 46 — 49, Phyllhermannia dentata n. sp. 



45. Propodosoma, dissected and flattened out. 47. Maxills. 48. Top of left palp, ventral side. 

 49. Leaf-shaped hair from dorsal shield. 



than the others. Epimera IV with one small median hair and in the lateral 

 half, a row of three long hairs near the posterior margin. 



In the space between epimera IV and the genital aperture there is a 

 transverse fold, where the cuticle has small,- semispherical projections. 



Genital aperture wider but shorter than the anal aperture and rounded 

 quadrangular. Along the median edge of the plates there are two rows of 4 

 small hairs each, one marginally the other submarginally. In this respect 

 the present species agrees with P. phyllophora in which according to MiCHAEL 

 (I. c. p. 142): »the genital plates bear double rows of small fine hairs on their 

 inner edges», a fact which seems very significant to me. 



Anal plates long and narrow, at the anteromedian angle with small tri- 

 angular plate, with two pairs of submarginal, fine hairs in the anterior half. 

 Near the antero-lateral angles of the anal plates there is a .pair of fine slits 

 on the venter resembling the areas porosae of other Oribatids. These are pre- 

 sent also in the genus Hermannia. 



