TRÄgArDH, ACARl. 35 



'l'lie pseudostigmatic organs are long and setifonn, tlie posterior ones a little 

 longer than the others, incasuring 0,ii!i mm. 



Eyes. One pair of single, rather largo eyes close to the sides of the body, on 

 a level with the anterior margin of cox£e II. 



Hairs. Three pairs of thick, blunt, hairy hairs, tapering gradually from a 

 broad basis towards the top. They are placed as foUows: one pair near the antero- 

 lateral corners, one pair in the lateral eorners and the third pair half way between 

 the others, but a little more inwards. 



The dorsal side of the body is provided with about 35 pairs of similar, all- 

 though somewhat more slender and curved hairs. 



The pseudocapitnlum (PI. 2, fig. 19) is strongly chitinized and of a brownish 

 yellow colour. 



The maxillary palps 5-jointed, inserted ventrally. First Joint very small, 

 flat; the second large, and broad, curved forward at a nearly right angle and at the 

 same time bent upwards, so that its distal half becomes nearly vertical and the exte- 

 rior (dorsal) side raised to the level of tlie iipper side of the mandibles ; S'^'^ and 4*'' 

 joints narroAV and straight, only half as broad as and both together as long as the 

 second Joint. The 4*^ joint slightly longer than the S^'^; it terminates in a double claw 

 nearly as long as the joint and curved slightly only at the top. 



The ö^'i Joint is discernible only as a low päd on the ventral and inner side of 

 the 4*'» Joint. 



Hairs. One blunt, stout and hairy bristle, curved slightly forwards at the basis, 

 is inserted on the external, upper edge of the second Joint, in the middle; it extends 

 forwards as far as to the anterior margin of the S^'^ joint. On the 3'''^ joint there is, 

 on the inner side far backward, a fine, curved pectinate hair. On the 4*'' joint there 

 are two similar hairs, one on the outer side, the other on the ventral side in the 

 middle and directed backwards. The 5"^ joint bears 7 fine, bare hairs, one of which 

 is directed straight inwards and downwards, two outwards and forwards, and 4 in- 

 wards and forwards. 



Sense organ. Close to the posterior margin of the 5*'i joint there is a small 

 cylindrical, thin-walled appendage, striated transversally. 



The hypostome. The two proximal thirds of the coxse fused together to a 

 flat shield, with a longitudinal shallow groove in the middle. The posterior margin 

 is slightly concave, the anterior one nearly semicircular and distinctly set off from 

 the rest of the maxillse. A little in front of the middle and submarginally the palpi 

 are inserted in deep foveolfe. Half-way between the palpi and the front margin 

 there is a pair of fine, pectinate hairs. The distal thirds are of the typical shape, 

 surrounding the claws of the mandibles with a large, extremely thin, hyalin plate, 

 open at the front. On the ventral side of this sucker-plate there is a dense ring 

 of fine, radiating and rod-like appendages. 



Mandibles of the typical shape, broad, flattened dorsoventrally, the dorsal 

 side sloping down towards the median, parallel sides, which are pressed closely together. 



