ACARINA FROM THE JUAN FERNANDEZ ISLANDS 



609 



Loc: Juan Fernandez, Masatierra, Rabanal in the bottom of the que- 

 brada c. 100 m. a. s., among dry leaves, Aug. 1917, no. 775. 



21. Coprholaspis arcuatus n. sp. — Figs. 121 — 130. 



Although Berlese (1918, p. 145—173) has taken great pains to define 

 clearly the numerous species of this genus described by him, it is evident that 



Figs. 121 — 127. Coprholaspis arcuatus n. sp. 9' 



121. Dorsal shield. 122. Vertical hair. 123. Shoulder hair. 124. Top of epistome. 

 125. Mandible. 126. Leg I. 127. Tarsus II. 



our state of knowledge of this and allied genera is still very unsatisfactory. 

 This is mainly due to the fact that the males are evidently very rare in this 

 group and, as a consequence, of the majority of species only the females have 

 been described. It is therefore impossible to know whether the characters of the 

 sternal shield of the females, employed by Berlese when subdividing the genus 

 Coprholaspis in subdivisions, are correlated with corresponding characters of the 



