353 

 Oribatella ovalis C. L. Koch. 



1835. Oribates oralis, C. L. Koch, Crust. Myr. Arach., Heft 3, Tab. 5. 



1877. Oribates oralis, Canestrini & Fanzago, Atti 1st. Venet., Ser. 5, Vol. IV., 



p. 82. 

 1855. Oribata nitens, Nicolet, Arch. Mus. Paris, T. VII., p. 433, PI. IV., 



Fig. 6. 

 1884. Oribala punctata, Michael, Brit. Orib., Vol. I., p. 253, PI. IX., Fig. 1-14. 

 1883. Oribates nicolet ii, Berlese, Acari, Myr., Scorp., Fasc. III., Nr. 3. 

 1895. Oribatella armata, Banks, Trans. Amer. Ent. Soc, Vol. XXII., p. 9. 

 1898. Oribata oralis, Michael, Das Tier., Lief. 3, p. 19. 



Dark walrmt-bvown; integument thick and very resistant; 

 surface pitted. 



Cephalothorax short and almost entirely hidden by the 

 large lamellae. Lamelhe greatly enlarged, as long as the ceph- 

 alothorax; pseudostigmata pyriform; pseudostigmatic organ 

 large, clavate, and about two thirds as long as the cephalo- 

 thorax. 



Abdomen oblong. Pteromorphaa very large, almost as long 

 as the entire body, and ending anteriorly in a long, sharp- 

 pointed process. Anal covers about half as long again as the 

 genital covers. 



Legs rather small aud hidden by the large pteromorphse. 

 The anterior pair project about half their length in front of the 

 apex of the rostrum; the posterior extend slightly beyond the 

 posterior margin of the abdomen. Tibia of the first two pairs 

 rather short. 



Length, 0.60 mm.; breadth, 0.42 mm. 



In moss. Collected by C. A. Hart, from the pitcher-plant 

 {Sarracenia purpurea), in bog, at Cedar Lake, 111., and by the 

 author at Homer, 111. 



Genus Oribata Latreille. 



Superior bristles not spatulate; mandibles stout; integu- 

 ment usually smooth; pteromorpha' attached to the abdomen 

 only; ungues tridactyle; lamellae attached by means of their 

 inner margins to the dorsal surface of the cephalothorax. 



