231 



and deliueated this species afterwards more extensively? secondly: 

 May it not be a nymph of Glycyphagus domesticus (de Geer) ready 

 to change in a hypopus, so that its integument shows already 

 the fine labyrinthic markings? 



20. Glycyphagus niichaeli Oudms. 



1888 Glyciphagus spinipes Michael in Journ. Linn. Soc. Lond., v. 

 20, p. 285, t. 16, f. 8—15. 



1889 Michael in Journ. R. Mier. Soc. Lond. p. 508. with pi. 



1899 Glycyphagus spinipes Canestrini et Kramer, Demodicidae et 

 Sarcopt, p. 147. 



1901 Michael, Brit. Tyrogl. v. 1. p. 245—250, t. 7 ; t. 8, 



f. 1, 2, 4—6, 11, 13, 15, 17. 

 1903 Glycyphagus michaeli Oudms. in Entom. Bericht, p. 103. 



Michael's Glycyphagus spinipes is a species closely allied to the 

 real spinipes (cadaverum Schrank) of the continent. Apparently it 

 differs only in the possession of a hairy scale on the femur of 

 leg 3, where the Continental spinipes has a hairy hair perfectly 

 resembling those of the other legs. I may utter here my supposition 

 that the tarsi of Gl. michaeli Oudms. are not thickly clothed with 

 very fine short hairs (Michael, 1888, fig. 14), but are provided, 

 like Gl. cadaverum (Schrank), with a long scale on the ventral side 

 of the tarsus. 



About the diagnose which Canestrini and Kramer give in 

 »Das Tierreich," see hereabove, p. 313. 



In Michael, British Tyroglyphidae, p. 246, 1 read: »Oudemans 

 says that Megnin identifies G. spinipes with Acarus destructor, 

 Schrank, and Acarus setosus, Koch. Oudemans does not say where 

 Mégnin asserts this. I do not find any reference to the subject 

 in his 1889 paper, but in »Les Parasites," p. 139, he treats 

 Acarus destructor, Schrank, and Acarus setosus, Koch, as being 

 ideutical with Acarus (Glycyphagus) domesticus, de Geer, not A. 

 spinipes, Koch." — Indeed Michael is right, I have been mistaken, 

 and should have better read the works consulted, — or the word 

 spinipes was a lapsus calami of mine. 



