118 (dr. a. c. oudemans). notes on acari. 



Shape oval , top forward, rounded tops, straight flanks. Texture like 

 that of the larva. — Dorsal side. There are ßve dorsal shields. The 

 anterior shield is elongate, truncate anteriorly, convex laterally, 

 rounded posteriorly, and hears 3 pair of fine hairs. The 2 shoulder- 

 shields are elongate, a little shorler and narrower than the anterior 

 shield, each with an eye anteriorly, a hole porleriorly and 3 hairs. 

 The posterior shield sub-trapezoidal , shorler than wide , wider 

 anteriorly than posteriorly, with a hole in each anterior angle, 4 

 pair of bristles and with a deep posterior median excavation. The 

 supra-anal shield small with one pair of bristles. Between the 

 3 fore-shields and the 2 hinder shields 3 pair of hairs and one 

 pair of holes. 



Ventral side (fig. 33). Between coxae 1 one pair of fine hairs ; 

 between coxae 3 one pair of ditto; quite terminal Vcx&amis; before 

 this opening the genital split; before this aperture one pair of fine 

 hairs; genital and anal apertures flanked by 5 pair of bristles. 



Mandibles like in the larva. 



Maxillae like in the larva. 



Legs like in the male. Olfactoric hair of taisi much smaller. 



Habitat: in dust, in houses; in moss. 



Patria. Netherlands, Germany, Italy. 



16. Cheletes eruditus (Schrank). 

 (With Plate 12, fiç. 34—38, and Plate 13, fig. 39—46). 



1697. Mijt van een gansch ander maaksel van gepelde garst. 



Leeuwenhoek, Brieven, 102e missive, p. 276. 



1781. Acarus eruditus Schrank, En. Ins. Austr. n''. 1058, Tab. 2, f. I. 



1790. — — Gmel. Syst. Nat. n'. 62. 



1792. — _ Oliv. Encycl. Méth , v. 7, p. 696. 



1796. Cheyletus eruditus Latr. Préc. caract. génériques Ins., p. 179. 



1802. Acarus eruditus Turton, Syst. Nat., p. 707. 



1804. Cheyletus eruditus Latr., Hist. Nat. Crust. Ins., v. 8, p. 54. 



1806. — — Latr, Gen. Crust. Ins., p. 153. 



1817. — — Latr., in Cuv. Regn. Anim., v. 3, p. 119. 



1826. Cheyletus capulatus Von Heyden, in Oken's Isis, p. 609. 



