289 



The movable fiuger is here only a very transparant appendage of 

 the spur ; they have coalesced. 



Peritrema. Long in females, short in males. 



17. Key to tlie species of Laelaps (C. L. Koch). 



j Exterior malae absent .... L. rovennensis G. et R.Gan.). 

 \ Exterior malae present. . L. agilis (C. L. Koch). 



18. Hypoaspis Can. 



According to the discovery mentioned above (sub Laelaps), we 

 are obliged to separate all the other species of the old genus 

 Laelaps, to unite them in a new genus. 



One of' these species, viz. Iphis globulus (C. L. Koch) is type 

 of the genus Leionotus C. L. Koch 1842 (Koch Ueb. d. Arachn. 

 Syst. vol. 3, tab. 10, fig. 51). It is the same aniraal as L^aelaps 

 placentula Berl. 1887 (Ac. Myr. Scorp. Ital. 44, 3). But. Leionotus 

 is preoccupied by Kirby in 18S7. 



A nother op the species, viz. Gamasus stabularis 0. L. Koch, 

 is type of the genus L^aelaps Berl. 1882 (in Att. R. Ist. Ven. 

 Sc. Lett. Art. ser. 5, vol. 8, p. 19). But JLaelaps is preoccupied 

 by Koch in 1836, as we saw hereabove (sub Laelaps). 



A third species, viz. Gamasus krameri G. et R. Can. was 

 chosen as type of the genus Hypoaspis by G. Canestrini 1885 

 (Can. Prosp. Acarof. Ital. p. 51 — 55), and, as this name is not 

 preoccupied, it must, according to the rules of nomenclature, be 

 adopted as the name of the present genus, including all the 

 known species of Laelaps (hitherto), except Laelaps agilis C. L. 

 Koch. 



18. a. Hypoaspis fuscicoleus Oudms., nov. sp. 



This species will be described in one of the subsequent Series. 



19. Emeus pyreiiaicus Oudms., ïiov. sp. 



(White Plate VIII, fig. 14 and 15). 

 Nymplxa. L,ength 700 &. — Colour pale. — Shape oval, with 

 two tops, more or less broad-spool-shaped. — The dorsal side 



