126 (dr. a. C. OUDEMANS) list of dutch ACARt. 



X , p. 205 sqq.) which this author was kind enough to lend me 

 for some time. On enumerating the free living Çheyleti (loc. cit. 

 p. 236) the writer also mentions Cheyletm longi'pes Mégn. Mégnin 

 does not give any description of this species, but only a sketch 

 (white lines on a black underground). We have only to compare 

 this sketch (Journ. Anat. Phys. 1878, p. 8.) with the figure of 

 Cheyletus venustissimus given by Koch (Deu. Cr. Myr. Ar. 23. 22. 

 4839) and with the descriptions of this animal by Koch (loc. cit.) 

 Canestrini and Fanzago (Att. R. 1st. Ven. Sc, Lett. Art. (5). IV. 

 1877. p. 51,) and Kramer (Zeit. ges. Nat. 51. 1878. p. 553, 554, 

 561^, to observe at once that these two species are synonym. 

 MÉGN1N himself seems to be of the same opinion , though he does 

 not say it, for he does not mention his Cheyletus longipes (1878) 

 in his work entitled Les Parasites et les maladies parasitaires, 

 1881 , p. 241 ! — And on enumerating the parasitical Cheyleti 

 Mr. Poppe does not mention that Cheyletus venustissimus was occas- 

 ionally found on Geometrldae and Microlepidoptera , and that a 

 species of Cheyletus figured in the Tijdschr. v. Entom. Vol. 24 

 tab. 3. f. 17 was found by me on Chlorospiza chloris. 



I am very obliged to Mr. Poppe that he has omitted these facts, 

 for I am now morally bound to publicate for the second time the 

 figure of the animal in question. I liave however resolved to draw 

 new figures of it, delineated under much higher engrossing powers, 

 and to give a description. I have even made a remarkable discovery, 

 viz., that there are Cheyleti which have eyes! 



11. Cheyletus squamosus de Geer. — De Geer in his Mémoires 

 pour servir à l'histoire des Insectes, Tome VII, Stockliolm, 1778, 

 p. 115 — 117 describes an acarus as follows: 



((11. Mitte rougeâtre, à écailles blanches sur le corps et sur les 

 pattes. » 



((Acarus (squamosus) ruoicwndns , corpore pedibusgue squamis al- 

 hidis tect'ts. y> 



(( J'ai trouvé le I de Juin un grand nombre de ces Mittes atta- 

 chées sons le corps de la Punaise très-applatie , qui vit sur l'agaric 

 du Bouleau, et dont j'ai donné l'histoire ailleurs; elles sont ex- 



