Phthiracarus 81 



, Dors, of Abd. (when creature upright) J / 3 longer than 



broad. Psstg. org. setiform. L. 1,5 mm .... 2. P. berlesei . . p. 81 

 \ Dors, of Abd. twice as long as broad. Psstg. org. very 



clavate. L. 700 |u 5. P. longulus . . p. 82 



j Psstg. org. filiform. L. 800 |u 1. P. arduus . . . p. 81 



4 { Psstg. org. with thin peduncle and flattened expanded 



head. L. 480 |u 3. P. canestrinii . p. 81 



_ [ Abd. rounded posteriorly. L. 1.1 mm . . . . . . 4. P. contractilis . p. 81 



:> \ Abd. pointed posteriorly - 6. 



I Psstg. org. with thin peduncle and fusiform head. - 



H L. 800 |u 6. P. nudus ... p. 82 



I Xo Psstg. org. visible externally. L. 1 mm ... 7. P. retaltecus . p. 82 



1. P. arduus (C.L.Koch) ?1841 Hoplophora testudinea, C.L.Koch, C. M. A., 

 fasc. 32 t. 11 j 1841 H. ardua, C. L. Koch, C.M. A., fasc. 32 t. 15 1888 H. a., Michael, 

 Brit. Orib., v. 2 p. 564 t. 51 f. 815. 



Im. Light red-brown and yellow-brown, varies in different parts of 

 creature ; smooth, dull, Abd. sometimes polished, marked with fine undulating 

 lines, frequently covered with fine dust. Psstg. org. long; upright, fili- 

 form. Intlam. hair very long; 2 parallel ridges on each side of aspis 

 running forward from Psstg. Abd. truncated anteriorly pointed posteriorly. 

 2 long and 2 short rows of long setiform hairs on Abd., and 2 pairs on 

 Cephth. besides the Rost. hairs and Intlam. hair. Ung. hetd. L. ca. 800 |u. 



England, Germany. 



2. P. berlesei Michael*) 1883 Tritia decumana, (err., non Hoplophora decu- 

 mana C.L.Koch 1835!), Berlese, A. M. S., fasc. 6 nr. 2 1885 T. d., Canestrini, Prosp. 

 Acarof., v. 1 p. 45. 



Im. Chestnut-brown, smooth. Psstg. org. setiform. Abd. rounded 

 posteriorly a few very fine longish hairs near edge. L. ca. 1,5 mm. 



In moss. Italy. 



3. P. canestrinii Michael**) ?1885 Tritia lentula, Canestrini. Prosp. Acarof., 

 v. 1 p. 45 '. 1887 T, I., (err., non Hoplophora lentula C. L. Koch 1841 !), Berlese. A. M. S., 

 fasc. 36 nr. 3. 



Im. Yellowish to reddish brown, polished, nearly pointed posteriorly. 

 Psstg. org. with longish thin peduncle and flattened expanded 

 head; curved and simple posteriorly; straight and pectinated anteriorly. 

 2 rows of long setiform hairs on Cephth. and Abd., post, part of anal covers 

 hairy. Ung. very hetd. Central claw thickest. L. ca. 480 |u. 



In moss. Italy. 



4. P. contractilis Perty 1841 P.O., Perty, Allg. Naturg., v. 3 p. 874 ; 1868, 

 Perty (in: Claparede) in: Z. wiss. Zool., v. 18 t. 36 f. 15 19 || non 1868 Hoplophora c., 

 Claparede in: Z. wiss. Zool., v. 18 p. 507. 



*) Berlese identifies this species, I think erroneously, with Hoplophora decumana 

 C. L. Koch (which is in my opinion a synonym of Hoploderma dasypus); therefore under 

 the rules which govern ,,Das Tierreich" the name cannot stand although in a different 

 genus, I have therefore named the species in honor of Prof. Berlese. A. D. Michael. 



**) Berlese identifies this species. I think erroneously, with Hoplophora lentula 

 C. L. Koch, therefore under the rules which govern ,,Das Tierreich" the name cannot 

 stand, although in a different genus. I have therefore named the species in honor of 

 Prof. Canestrini. A. D. Michael. 



Das Tierreich. 3. Lief.: A.D.Michael, Oribatidae. 



