56 



Damaeus 



t. 6 1855 D. awritus, Xicolet in: Arch. Mus. Paris, v. 7 p. 462 t. 8 f . 3 |j non 1887 

 Bella nodipes, Berlese, A. M. S., fasc. 43 nr. 2. 



Irn. Dark brown, lighter when lately emerged; smooth not polished, 

 often powdery, often carries dirt. Cephth. with 2 transverse furrows, between 

 them are 2 short longitudinal ridges and rectangular projections bearing leg 1. 

 Psstg. very projecting on mamilliform elevations. Psstg. org. filiform not so 

 long as those of D. geniculatus, 4 short ridges behind Psstg. between 

 legs 1 and 2 is a chitinous projection longer narrower and more 

 pointed anteriorly than in D. geniculatus. Legs very long and 

 thin, joints mostly with long thin peduncle and suddenly enlarged head. 

 Abd. almost globular. About 14 black curved hairs on Dors, of Abd. and 

 4 on post, margin. — Nph. Light yellow or reddish, legs pink, smooth • 

 4 rows of large papillae on Dors, of Abd.; in young specimens and Nph.: 

 often only the post, pair persist in fully-grown Nphs. ; each papilla bears a 

 long, black, slightly serrated hair. Carries dirt and debris. — Im. L. ca. 

 1,05 mm. L. of leg 4 ca. 1,8 mm. 



All early writers except Hermann, and also Canestrini & Fanzago (1877. in: Atti 

 1st. Veneto, ser. 5 v. 4) confuse this species with D. geniculatus. 



Algeria, England, France. Germany, Italy. S-weden. Swtzerland. 



4. D. concolor G. L. Koch 1840 D. c, C. L. Koch, C. M. A., fasc. 30 t. 6 | 1887 

 Bella c, Berlese, A. M.S., fasc. 43 nr. 1 1 1896 Dameosoma c. Berlese, A. M.S., Crypt. II 

 p. 54 | ?1882 Bella denticulata, G. & R. Canestrini in: Atti 1st, Veneto, ser. 5 v. 8 p. 914 

 t, 8 f.4 | 1885 B.d., Canestrini, Prosp. Acarof.. v. 1 p. 40. 



Im. Chestnut-brown Cephth. and Abd. without markings. Psstg. 

 org. long, slightly clavate, pointed at distal ends. Abd. globose. 

 Dors, of Abd. and post, margin with long flexible hairs. L. ca. 690 |u. 



Germany. Italy. 



5. D. flagellifer Michael 1890 D. f., Michael in: P. zool. Soc. London, p. 422 

 t. 38 f. 2. 



Im. Dark brown, smooth, not polished, very finely punctured. Cephth. 

 slightly spotted, but without true markings. Psstg. org. long, setiform. 

 flexible, curled or undulated near distal end. Legs with joints clavate, 

 Femora suddenly so, leg 4 ca. 850 |u. One hair on Femur and Genual 

 of this leg like Psstg. org. and greatly larger than any other hair 

 on creature. L. ca. 650 |u. 



Algeria. 



6. D. geniculatus (L.). C.L.Koch ?1758 Acarus g., Linne. Syst. Nat., ed. 10 

 p. 617 | ?1761 A. g., Linne, Fauna Suec. ed. 2 nr. 1977 j ?1796 A. g., Latreille. Precis 

 Caract. Ins., p. 184 | ?1803 A. g., Schrank. Fauna Boica, v. 3 p. 208 nr. 2666 j ?1806 

 Gribata geniculata, Latreille, Gen. Crust. Ins.. r. 1 p. 149 | 1835 Damaeus geniculatus, 

 C.L.Koch, CM. A., fasc. 3 t, 13 j 1855 D. g., Nicolet in: Arch. Mus Paris, v. 7 p. 460 

 t. 8 f. 1 | 1888 D. g., Michael, Brit. Orib., v.2 p. 428 t.39 I 1844 Belba geniculata. 

 Gervais in: Walckenaer, Ins. Apt., v. 3 p. 256 | 1877 B. g., Canestrini & Fanzago in: 

 Atti 1st. Veneto, ser. 5 r.4 p. 101 \WSlB.g., Berlese, A. M. S., fasc. 36 nr. 4 | ?1835 

 Damaeus torvus, C.L.Koch, C. M. A., fasc. 3 f. 14 (Xph.) \ ?1844 D. onustus, C. L. 

 Koch. C. M. A., fasc. 38 t. 7. 



Im. Dark brown or black, dull, slightly rough. Cephth. with 2 trans- 

 verse furrows and 2 triangular depressions bordered laterally by ridges: 



