Oribata 



17 



17. O. rubens C.L.Koch 1841 Oribates r., C.L.Koch. CM. A., Ease. 81 t.10 

 1887 0. longipes, Bcrlese, A. M.S., fas e. 35 nr. 5. 



Im. Chestnut-brown; smooth. Cephth. short. Lam. and Trlam. blades 

 on edge ; no C. lam. Psstg. org. moderate length, clavate, curved forward. 

 Lam. and Intlam. hairs slightly pectinated. Abd. globular, hairless. 

 Ptm. not reaching far back, terminated suddenly posteriorly, slightly undulated 

 anteriorly. Legs 1 and 2 long, femur 1 passing tip of Rost. L. ca. 450 \x. 



In moss. Germany, Italy. 



18. O. setosa C.L.Koch*) 1835 Murtia trimaculata, C. L. Koch. CM. A., 

 t'asc. 3 t. 21 (Nph. !) | 1840 Oribates setosus, C. L. Koch, C M. A., t'asc. 30 t. 19 I 1855 

 Oribata setosa, Nicolet in: Arch. Mas. Paris, a 7 p. 43B t. 5 f. 4 j 1884 0. a., Michael, 

 Brit. Orib., v.l p. 243 t. 7 f. 3 —12 | 1889 Oribates setosus, Berlese, A.M.S., fasc.43 

 t. 4 | 1872 Oribata notata, Thorell in : Ofv. Ak. Forb.., v. 28 p. <>83. 



Im. Dark brown, a lighter patch near ant. margin of Abd. Ptm. and 

 legs lighter. Broadly pyriform, round posteriorly. Lam. large blades on 

 edge; 0. lam. almost horizontal, with points nearly as long as Rost. 

 Trlam. a blade with deep central indentation, and forming with 

 Lam. sharp angles which bear strong serrated Lam. hair. Tectp. 1 

 with long point bearing curved, serrated spine. Psstg. org. longish, rough, 

 clavate, slightly recurved. Intlam. hair long, rigid, serrated. Abd. slightly 

 longer than broad. Ant. margin of Abd. forms 3 shallow lobes. Ptm. vague 

 posteriorly. Dors, of Abd. smooth, dull. 1 or 2 rows of rough thick hairs round 

 margin ; a variable species. — Nph. Rost. and legs pink-brown, chitinous, 

 Abd. bluish-white ; alimentary canal shows dark, often yellow-green ; expulsory 

 vesicles almost black ; a constriction between Rost. and remainder of Cephth. 

 2 pairs of rough Rost. hairs. Psstg. org. short, clavate ; Intlam. hair rough 

 spines. Ant. margin of Abd. slightly concave, several rough spines on 

 Dors, of Abd. — Im. L. ca. 540 |u. 



In long grass etc. England, France, Franz-Joseph Archipelago. Germany. Italy, 

 Netherlands, Spitzbergen. 



19. O. sphagni Jlichael 1880 0. s., Michael in: J. R. micr. Soc, 0.3 p. 179 t. 4 

 f.6— 9 | 1884 O.s., Michael, Brit, Orib., v.l p. 223 t. 3 f. 1— 8. 



Im. Yellow-brown, polished. Rost. blunt. Lam. narrow, blades on 

 edge ; C. lam. short with curved hair at point. Trlam. a line only. Psstg. 

 small, hidden by Ptm. Psstg. org. minute, entirely hidden within Psstg. 

 No Intlam. hair. Legs short, pair 4 not extending beyond Abd. Abd. oval, 

 ant. margin sinuous. Dors, of Abd. polished and hairless. Ptm. strap-like, 

 only covering about half the femur of leg 2. — Nph. Greenish-white or 

 yellow-grey, legs pinkish or yellow. Rost. bluntly-conical with ridges enclosing 

 spaces, Psstg. near together, Psstg. org. long and filiform. Intlam. hair 

 upright spines. Abd. shield-shaped, Dors, flat, covered with irregular wavy 

 ridges bearing scattered dots. Whole edge of Abd., except ant. margin 

 armed with long spikes. — Im. L. ca. 320 |u. 



On sphagnum. England. 



*) According to the synonyma enumerated above by the author and 

 in accordance with the ..Regeln fur die wissensch. Benennung der Thiere" 

 the name of this species is: O. trimaculata (C.L.Koch). The Editors. 



See my note p. 7. The Author. 



Das Tier re ich.. 3. Lief.: A. D. Michael, Oribatidae. 2 



