238 



behind, that of the female quite in this plate. Cephalothorax and 

 abdomen fused. Consequently : 



1 (15) Glycyphagus fuscus Oudemans, 1902, ex Troupeau, 1879. 

 Another typical species is Glycyphagus peregrinans Berlese, cha- 

 racterized by its dorsuru, apparently protected by a dorsal shield, 

 provided with nurnerous minute conical spines ; its ventral side 

 is striated, (I raay suppose except the coalesced coxal plates, within 

 which in both sexes lies the genital aperture). Hairs of the body 

 hairy, almost of the same length, shorter than the creature's lar- 

 gest width. Thus : 



1 (23) Glycyphagus peregrinans Berlese, 1892. 

 We may suppose that Acarus cubicularius 0. L. Koch is closely 

 allied to Glycyphagus domesticus (de Geer) ; so too Gl. troupeaui 

 Oudemans; also Gl. sculptilis Mégnin, so that we have in this 

 small group the following species : 



Glycyphagus cadaverum (Schrank), 1781, ex 1776. 



» domesticus (de Geer), 1778. 



» cubicularius (C. L. Koch), 1841. 



» setosus (G. L. Koch), 1841. 



» ornatus Kramer, 1878. 



» troupeaui Oudemans, 1903, ex Troupeau, 



1879. 



» sculptilis Mégnin, 1880. 



» intermedius Canestrini, 1888. 



» michaeli Oudemans, 1903, ex Michael, 1888. 



» privatus Oudemans, 1903. 



» fustifer Oudemans, 1903. 



» burchanensis Oudemans, 1903. 



I am not acquainted with Gl. cubicularius , troupeaui, sculptilis, 

 and intermedius. — Gl. sculptilis must be immediately recognisable 

 by its »téguments gravés de fines stries, symétriques et serrées, 

 et qui sont de couleur enfumée." — Gl. troupeaui by its short 

 hairs equaling in length the creature's greatest width. — Gl. in- 

 termedius by its rodlike, thick, haired hairs. — The remaining 

 species we may bring in two groups. 





