6 



Oribatinae, Pelops 



2 genera, 55 good and 19 doubtful species. 



Key to the genera. 

 i Mdb. broad at base, suddenly becoming and continuing 

 1 J slender and rod-like, chelae small; Intlam. hair 



I usually spatulate and horizontal 1. Gen. Pelops . . p. 6 



Mdb. thick and stout, not slender nor rod-like in any 



part; Intlam. hair usually setiform and erect . . 2. Gen. Oribata . p. 9 



1. Geu. Pelops C.L.Koch 



1835 Pelops (Im.) + Celaeno (Nph.) (part.), C.L.Koch, CM. A., fasc.2,3 

 P. (Im.) + C. (Nph.) (part.), C. L. Koch, Ubers. Arach., v. 3 p. 102, 108. 



1842 



1 



Mdb. broad at base, suddenly becoming stiliform, termi- 

 nated by minute chelae. Intlam. hair usually large and spatu- 

 late and horizontal ; usually inserted below a rectangular (square 

 or oblong) projection of ant. margin of Abd. Ung. trid. 



10 species. 

 Key to the species. 



I With a rectangular projection from ant. margin of Abd. (Div. I. 

 p. 6) - 2. 

 "Without any rectangular projection from ant. margin of Abd. 

 (Dir. II. p. 8) — 9. 



{Dors, of Abd. and Ptm. deeply pitted — 3. 

 Dors, of Abd. and Ptm. not pitted — 4. 



I Almost the whole median line of 

 Dors, of Abd. occupied by 2 

 shallow depressions 5. P. occultus . . . p. 8 

 No such depressions 7. P. torulosus . . p. 8 



J Hairs on Abd. all setiform .... 4. P. fuligineus . . p. 7 

 \ Hairs on Abd. all or partly spatulate — 5. 

 Spatulate hairs on Dors, of Abd. — 6. 

 Spatulate hairs on actual post, margin only — • 8. 

 No true Lam., 4 rows of spatulate hairs on Dors, of 

 Abd. — 7. 



Lam. well marked and meeting anteriorly, 2 rows 



only of spatulate hairs near lat. margin .... 8. P. uraeeus . 



Psstg. org. clavate 1. P. acromius 



Psstg. org. falciform 3. P. farinosus 



2 pairs of spatulate hairs on post, margin .... 6. P. tardus . . 

 1 pair of spatulate hairs on post, margin .... 2. P. auritus . 

 Intlam. hair large, broadly falciform; Dors, of Abd. 

 smooth, very finely punctured; 8 or 10 hairs on post. 



margin not spatulate 9. P. glaber . . . 



Intlam. hair small and fine; Dors, of Abd. coarsely 



pitted; 2 pairs of spatulate hairs on post, margin 10. P. phaeonotus . p. 



Fig. 6. 

 P. fuligineus. 



M<Td. ( 3n0 A). 



P- 



.9 

 Div. I. 



Sp. 1—8. With a rectangular projection from ant. margin of Abd.' 



1. P. acromius (Herm.) 1804 Notaspis acromios (corr. acromius), Hermann, 

 Mem. apt., p. 91 t. 4 f. 1 | 1855 Pelops a., Nicolet in : Arch. Mus. Paris, v. 7 p. 425 t. 3 

 f. 1 ! 1877 P. a., Canestrini & Fanzago in : Atti 1st. Veneto, ser. 5 ».4 p. 78 (var.?) | 1884 

 P. a., Michael, Brit. Orib., v.l p. 208 1. 1 f. 1— 12; t. 2 f. 13 | 1835 Celaeno spinosa, 

 C. L. Koch, C. M. A., fasc. 3 1. 17 (Nph.). 



Im. Black, nearly circular, broad posteriorly. Abd. large, broad poste- 

 riorly, flattish, rough, with irregular vermiform ridges. The ridges look 



