Oribata 19 



24. O. ovalis C. L. Koch 1835 Oribates ovalis, C. L. Koch, C. M. A., fasc. 3 t. 5 

 j 1877 0. o., Canestrini & Fanzago in: Atti 1st. Veneto, ser. 5 v. 4 p. 82 | 1855 Oribata 

 nitens, Nicolet in : Arch. Mus. Paris, v. 7 p. 433 t. 4 f. 8 j 1879 0. n., L. Koch in: Svenska 

 Ak. Handl., v. 16 p. 115 t. 4 f . 4 | 1885 O.punctata, Nicolet in: Arch. Mus. Paris, v. 7 

 p. 434 t. 4 f. 7; t. 2 f. 3 ' 1884 0. p., Michael, Brit. Orib., v. 1 p. 253 t. 9 f. 114 1883 

 Oribates Nicoletii, Berlese, A. M. S., fasc. 3 nr. 3 | ?1895 Oribatella armata, Banks in: 

 Tr. Amer. ent. Soc., v. 22 p. 9. 



Im. Chestnut-brown to black; variable, typically dull and punctured, 

 var. nitens Nic. polished; Lam. very large, almost hiding Cephth., 

 broad, horizontal, reaching tip of Rost., their inner edges almost 

 touching, truncated anteriorly; but with a prolonged point at outer angle; 

 Lam. hair from inner angles, short, hooked downward. No Trlam. Psstg. 

 org. medium length, slightly thickened toward tip ; Abd. arched, hind margin 

 truncated. Ptm. large, clearly denned posteriorly, prolonged anteriorly, 

 forming points which almost reach tip of Rost. A row of fine hairs 

 round Dors, of Abd. and 2 sparse longitudinal rows on same ; a very variable 

 species. Nph. brown, leathery, deeply wrinkled; Psstg. org. long, rough. 

 - Im. L. ca. 650 |u (but very variable). 



England, France, Germany, Italy, Netherlands, ? New York State America. 



25. O. quadricornuta Michael 1880 0. q., Michael in: J. R. micr. Soc., v. 3 

 p. 181 t. 4 f. 15 ] 1884 0. q., Michael, Brit. Orib., v. 1 p. 247 t. 8 f. 110. 



Im. Chestnut-brown, a vague lighter patch near ant. margin of Abd. 

 legs light. Broadly pyriform; smooth not polished. Rost. rounded, with 

 flattened margin, Rost. hairs large, curved, strongly pectinated on 

 outer edges. Lam. very large, their hind margins, and those near 

 cusps almost meet, arched, but otherwise horizontal. Ant. edge of Lam. 

 deeply excavated, leaving 2 horns as long as Rost; Lam. hair in 

 centre of excavation, large, serrated; no Trlam. Intlam. hair long, 

 serrated; Tectp. very large ant. edges of pair 1 strongly serrated. 

 Psstg. org. long, clavate, pointed anteriorly rough. Ant. margin of Abd. much 

 sinuated. Ptm. large. A row of long, flexible hairs on Dors, of Abd. and 

 some on post, margin. - - Nph. Pale flesh-colour, Rost. and legs darker, 

 polished, transparent. Psstg. org. like Im. Intlam. hair extremely long, 

 serrated; a similar but smaller pair on Dorso-vertex. Rost. hairs similar. 

 Numerous serrated spines on legs. Dors, of Abd. shield-shaped, arched, a 

 large fold near ant. margin of Abd., a truncated conical projection in centre 

 of post, margin; numerous serrated spines on Dors, of Abd. - Im. 

 L. ca. 580 |n. 



On dead wood etc. Algeria, England. 



26. O. quadridentata (Banks) 1895 Oribatella 4-d., Banks in: Tr. Amer. ent. 

 Soc., v.22 p. 8. 



Im. A species apparently resembling 0. quadricornuta and 0. berlesei, 

 but Psstg. org. stated to be short (shape not stated). Dors, of Abd. with 

 about 24 long stiff hairs; Ptm. stated to be ,,large, finely reticulate, ant. 

 margin finely dentate, terminating below in a small spine". Species im- 

 perfectly described from one specimen, not figured; but if the description 

 of the Ptm. be correct this is a good species. The ant. margin of the 

 Tectp. 1 is dentate in 0. quadricornuta and 0. berlesei, but the author 

 (Banks) never describes Tectp. L. 600 ju. 



New York State. 



