Oribatinae, Pelops 



2 genera, 55 good and 19 doubtful species. 



Key to the genera. 



i Mdb. broad at base, suddenly becoming and continuing 

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



usually spatulate and horizontal ........ 1. Gen. Pelops . 



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



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



[>. 6 

 p. 9 





1. Gen. Pelops C.L.Koch 



1835 Pelops (Im.) -f- Celaeno (Nph.) (part), C. L. Koch, C. M. A., fasc. 2. 3 

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



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. 

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



p. 6) - 2. 



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

 (Div. II. p. 8) 9. 



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

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

 / Almost the whole median line of 

 Dors, of Abd. occupied by 2 



j shallow depressions 5. P. occultus . 



* No such depressions 7. P. torulosus 



f Hairs on Abd. all setiform .... 4. P. fuligineus 

 \ 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 

 I only of spatulate hairs near lat. margin .... 8. P. uraceus . 



J 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 . 



p. 8 

 p. 8 

 p. 7 







p. 8 

 p. 6 

 p. 7 

 p. 8 

 p. 7 



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

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

 ' margin not spatulate ............ 9. P. glaber . . . 



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



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



p. 8 

 p. 9 



Div. I. 



Sp. 18. 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 I 1877 P.a., Canestrini&Fanzagoin: Atti 1st. Veneto, ser. 5 w.4 p. 78 (var.?) | 1884 

 P.O., Michael, Brit. Orib., v. 1 p. 208 t. 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 



