ACARINA FROM THE JUAN FERNANDEZ ISLANDS 



623 



shorter hairs, the distance between the posterior 3 being only half that of the 

 distance between the anterior 3; near the base of the joint there is one hair, 

 inserted near the ventral edge and directed obliquely downwards and backwards; 

 on the inner side of the joint a little below the middle, there is a row of 7 hairs 

 of which the posterior 4 are inserted more closely together than the anterior 4, 

 of which the anterior one is twice as long as the others and curved forwards. 



3rd joint with only two dorsal hairs, 4th joint with 4, two dorsally near 

 the anterior edge, one smaller on the exterior side and one on the interior 

 side, as long as the terminal hair of the 5th joint. 



5th joint narrower than the others, perfectly straight and of uniform width, 

 rounded at the top. It has in all about 21 hairs, which increase very slightly 



Figs. 158-160. Scirus longipaipis n. sp. 

 158. Maxillary palp. IS9- Rostrum, ventral view. 160. Epimera. 



in length towards the top, where there are three hairs, of which the dorsal one 

 is slightly longer than the median one and the ventral one is only about ^Z* 

 of the dorsal one; the other hairs are of subequal size except one dorsal near 

 the top which is only half as long as the others. 



Mandibles (figs. 161 — 162) long and narrow, 5 times as long as they are 

 wide at the base; only one, rather short hair, inserted almost half as far from 

 the anterior as from the posterior end. Chela (fig. 162) with narrow, almost 

 straight upper jaw ending in a blunt tooth, behind which the edge is concave; 

 lower jaw twice as wide as the upper one, curved in an even curve, ending in 

 a blunt tooth, behind which there is another, very low and blunt tooth. 



Rostrum (fig. 156) three times as long as it is wide at the basis. It has 

 in all 6 pairs of hairs, of which one pair is inserted marginally far forward, one 

 pair also marginally a little behind the middle and the remaining four form 

 two converging longitudinal rows in the proximal third. 



