22 



Oribata 



Im. Light red-brown, polished, like 0. ovalis but Lam. different, vizt. 

 large thick blades not transparent, set at angle of about 45°, con- 

 cave inward slightly wider and much further apart posteriorly than ante- 

 riorly, truncated anteriorly. Lam. hair from outer (upper) angle. 

 Abd. said to be hairless. L. 520 |u. 



France. 



36. O. lueasi Nic. 1855 O.Lueasii, Nicolet in: Arch. Mus. Paris, v. 7 p. 432 

 t. 4 f. 2 i 1884 O.L., Michael, Brit, rib., v.l p. 262 t. 11 f. 1— 5. 



Im. Light reddish-brown. Legs and Ptm. lighter, yellowish; polished. 

 Cephth. long; Rost. sharp; Lam. narrow blades on edge; no C. lam. nor 

 Trlam. Psstg. org. with fusiform head on long slender peduncles, 

 recurved. Rost. hairs long, curved; very large blades to femora 2. Abd. 

 oval, rather long; Dors, of Abd. arched but flattened centrally, hairless. 

 Ant. margin of Abd. slightly sinuous ; Ptm. small, transparent. A few short 

 hairs round post, margin. Ventr. plate much embraced by dorsal at sides. 

 Genital covers almost heart-shaped, far forward ; anal covers large, square. 

 — Nph. Very like a Notaspis Nph. White, transparent ; internal organs 

 shew. Cephth. long, constricted in middle. 2 pairs of Rost. hairs. Psstg. 

 org. like Im., but directed forward. Dors, of Abd. hairless, without markings. 

 A fine hair on each antero-lateral angle and a few short ones on post, 

 margin. — Im. L. ca. 600 |u. 



Algeria, England, France. 



37. O. mucronata G. &R Can. 1882 0. m., G. & R. Canestrini in: Attilst. 

 Veneto, ser. 5 v.8 p. 916 t. 9 f . 2 | 1892 Oribates mucronatus, Berlese. A. M. S., 

 fasc. 62 nr. 8. 



Im. Dark-brown, Ptm. yellowish. Like 0. dorsalis ; but. post, margin 

 of Abd. forms 2 chitinous points near median line, and between them a 

 hyaline, median, pointed projection divided longitudinally. L. 650 — 800 |u. 



C. L. Koch, C. M. A., fasc. 2 1. 14 (1835). states that what is evidently this species 

 is one sex of his Zetes dorsabs and that he found them in Copo, but as no such sexual 

 variation is known in the Oribatidae and no one else has ever seen any species in 

 Copo and both sexes of Oribata (Zetes) dorsalis are known, this statement is probably 

 an error. 



Germany, Italy. 



38. O. peloptoid.es Berl. 1888 Oribates p., Berlese in: Bui. Soc. ent. Ital., v. 20 

 p. 215 1. 13 f. 3. 



Im. Chestnut-brown. Lam. long but very narrow. No Trlam. Psstg. 

 org. (as in 0. lucasi) with long peduncle and fusiform reflexed head. Dors, 

 of Abd. rough, punctured or areolated. Ptm. short, truncated anteriorly and 

 posteriorly. 4 rows of stout hairs on Dors, of Abd. and a row round edge. 

 L. ca. 450 |u. 



Under stones. Brazil, Paraguay. 



39. O. rugifrons Stoll 1891 O.r., 0. Stoll in: Biol. Centr.-Amer.. Arach. acar., 

 p. 25 t. 15 f. 2. 



Im. Black, smooth, not polished, like 0. dorsalis, but dors, surface 

 marked with extremely fine longitudinal wrinkles. L. ca. 850 |u. 



Brit. Honduras, Guatemala, 



