FURTHER NOTES ON 4CARI. 123 



Celeripes euryalls (G. Can.) , described and figiu'ed by Berlese 

 in his Acar. Myr. e Scorp. Ital. , LIV, n*'. 3. 



Pteroptus pilifer Neum. , described by Neuman in his Oiu Hy- 

 drachnider, p. 11 in my opinion is synonym to Celeripes vesper- 

 tilionis (L.) 



Linné's Acarus vespertMlonls includes certainly two species, viz. 

 an Acancs and a iSfi/cterihia. He placed it under Pediculus in his 

 Fauna Suecica n'\ 1951, and in his Syst. Nat. Ed. X, and says 

 of it in his Systema Naturae, Ed. XII, n^. 9 : « insolitae figurae, 

 Phalangio simile». Two proofs, that he saw an animal with 6 

 very long legs. Moreover he cites Frisch and Scopoli. 



Now Frisch, VII, VII, tab. VII. really saw a Cé?^m;;t'^ (1728). 



Scopoli too, for, though he cites Linnaeus, he adds: «pedum 

 numerus imprimis Acarum indicat ». [Acarus vesper tilionis , Ento- 

 mologia carniolica n°. 1058, 1763). 



The ancient writers on Celeripes vesper tilionis most probably saw 

 differeut animals or forms of animals, for some describe the 

 body as rhombeous , others as round , one describes the fe- 

 male's abdomen with 4 or 6 hairs, another as with numerous 

 hairs. 



Berlese (loc. cit.) figures the dorsal shield of the c? of Celeripes 

 vespertilionis (L.) on plate 2 different from that on plate 4. (Gha- 

 racteres generis Pteroptus). Consequently one of the two drawings 

 is wrong, — or Berlese figured males of two different forms , — 

 or the dorsal shield of the S of Celeripes vespertilionis (L.) does 

 not show always the same distribution and number of the round 

 spots. But if so, Berlese should have mentioned this fact. 



I make the same remarks as to the drawings of the dorsal shield 

 of the ? (Berlese Ac. Myr Scorp. Ital. LIV, n^ 2 and 4). 



Belese's drawings are sometimes inaccurate as to the repren- 

 tations of the form and distribution of the hairs in Acari. So I 

 don't know whether the two species of Celeripes are delineated 

 accurately by Berlese, but I doubt of it. 



Neuman describes in his essay « Om hydrachnider », p. 11. 

 Pteroptus pilifer, but whether this description is based on a male 



