rURTHHTl NOTES ON ACAHT. 117 



Tlie so called second claw of Trlcli. osmlae is quite anotlier organ , 

 viz. a prolongation of the distal end of the tarsus, not comparable 

 with the second claw of Trick, alfkeni ! 



We observe, that occasionally the second claw may become 

 invisible, and this is especially the case when the animal has 

 retracted its legs ; we must therefore be very careful in deciding 

 whether the animal is mono- of didactyle. 



8. Tricliotarsus japouicus nov. sp. 



Only the hypopus i-ï known to me. Fig. 21. 



Length 0,217, breadth 0,198 millimeter. 



One single specimen, found on Xyloco^icc clrcumvolans ii^mn , 

 of Japan. 



The animal resembles Trichotarsm alfkeni, but differs from it by 

 the following peculiarities It has only ö?^(? claw , like all the known 

 species of Trichotarsus. This claw is much smaller than that of Trich. 

 xi/locopae or of Trich. aljkeni. The tarsus of the first three paii's of legs 

 shows, exactly as in Trichotarsus 05w;ißi?D0NNADiEU, a strong chitinous 

 projection. This projection is called a second claw ])y Kramer and 

 Canestrini (Das Tierreich , Sarcoptidae). They are wrong, for 

 this projection is iminovahle, whilst a claw is movable. The projection 

 is in my figure 21 visible on the 1st, 2d and 3d left and on the 

 3d right legS; 



The tarsus of the first three pairs of legs bears two beautifully 

 curved, lanceolated hairs, like those of Tijrocjlyphus nii/cophagus 

 MÉGNIN. The proximal end of these lanceolated hairs is cylindrical, 

 the distal one very flat. 



Dorsal and ventral surface are exactly those of Trich. alfkeni. 



The tarsus of the ^th pair of legs ends into two hairs, of which 

 one is very long, 0,400 mm., and the other 0,050 mm., conse- 

 quently one eighth of the longer one. 



9. Trichotarsus ornatus, nov. sp. 



Only the hypopus known to me (Fig. 22 and 23) in one specimen, 

 found on Xi/locopa circwmvolans Smith, of Japan. 

 Length 0,334, breath 0,210 millimeters. 



