ACARINA FROM THE JUAN FERNANDEZ ISLANDS 



617 



the anterior, where the pair of curved lines flanking the pores of the hairs are 

 more easily discernible than the others. 



In the anterior part of the shield there are several rounded areas of thin, 

 depressed cuticle, of almost the same pattern as described by me in L. nitiri- 

 cola (1908, p. 56, fig. 12 pi. 3). They are, however, far from conspicuous and 

 in order to examine them thoroughly it is necessary to make the mite trans- 

 parent in boiling lactic acid and then dissect the dorsal shield.^ 



In L. pallidus there is one median rounded area, longer than wide, ex- 

 tending forwards about halfway between the 3rd and 4th median longitudinal hair, 

 the last pair being inserted a little behind its middle marginally. This area is 

 flanked by two more or less triangular areas with rounded angles and of vary- 





Figs. 145 — 147. Lcelaps pallidus n. sp. 

 145. Anterior part of dorsal shield. 146. Ventral shields. 147. Mandible. 



ing shape in different specimens. Almost in the middle of these areas there 

 is a circular pore and the areas are subdivided into 4 — 5 smaller, rounded light 

 areas. Further backwards there is a trace of the anterior part of the narrow 

 longitudinal area, present in L. muricola Tragardh and L. sculptiiratus V. 

 VlTZTHUM. This is flanked by two groups of 5 — 6 faint, rounded areas, and 

 further backwards more laterally there are two similar groups of rounded areas. 

 The hairs of the dorsal shield are slightly curved and very pointed. The 

 vertical hairs are much shorter than the others which increase gradually in 

 length backwards, the shoulder hairs measuring 75 ji, while the hairs halfway 

 between the shoulder and the posterior margin are about 135 {i long and those 

 in the posterior third and at the posterior margin increase from 160 to 170 {i. 



^ In L. echidninus Berlese delineates three such areas, v. VrrzTHUM, on the other hand, 

 who describes very carefully the corresponding feature in other species of Lcelaps, does not 

 delineate it nor mentions it in L. echidninus. 



