ACARINA FROM THE JUAN FERNANDEZ ISLANDS 



591 



Palpi and mandibles not in such a state as to allow a detailed description. 



Hysterosoma (fig. 66) rather highly arched in the centre but round the 

 margin it is almost flat, forming a nearly horizontal band, which widens con- 

 siderably towards the posterior end. The anterolateral angles are projecting 

 as very small horizontal rounded blades the top of which is obliquely cut off (fig. 69), 

 The sides are straight, diverging gradually backwards, the posterior margin 

 being perfectly semicircular. On the posterior slops there are about 25 rounded 

 areae porosae. 



The hairs are of the same size and shape as the lamellar hairs, viz. small, 

 curved, leaf-shaped with dentate or serrated edges. There are two longitud- 



Figs. 68 — 75. Carabodes verrucatus n. sp. 



68. Top of left lamella. 69. Left anterolateral angle of hysterosoma. 70. Pseudostigmatic 

 organ. 71. Part of cuticle of dorsal shield. 72. Translamella with insertion points of rostral 

 hairs and triangular, rostral plate. 75. Hypostome with maxillae. 74. Leg II. 75. Leg III. 



inal rows of five pairs near the centre and two lateral rows of 4 pairs half-way 

 between the side and the median row. Round the posterior margin there are 

 four pairs of equidistant hairs and further forwards one pair. 



Ventral side (fig. ^'j). Sternum broad, apodemata well developed be- 

 tween epimera I and II and II and III, but between epimera III and IV they 

 are only present in the lateral half. Behind epimerae IV there is a pair of 

 ridges running obliquely backwards and outwards to a level between the gen- 

 ital and anal shields. Between these there is a transverse ridge running in a 

 curve parallel with the anterior margin of the anal shield; from this two short 

 ridges run obliquely forwards and outwards and meet the postepimeral ridges, 

 and two other ridges run backwards to meet a long semicircular ridge sur- 

 rounding the posterior margin of the anal aperture. Genital aperture with 4 

 pairs of small hairs, anal with two pairs. 



