4 (1)R. A. C. ÖUDEMANS). NOTES ON ACARI Vl^ 



which in this species is triangular, with top turned forward. The 

 top of this triangle (fig. 12) reaches ahnost the level of the pseudo- 

 stigmata. The shield itself is wrinkled , not smooth, and its wrinkles 

 are still finer and less observahle than those of the other skin. 

 The shield bears two minute hairs and a fifth eye , with hroiriùsh- 

 2mrple pigment and a distinct cornea. I consider these three kinds 

 of eyes useful to the animal to discern three kinds of light or 

 warmth. The pseudostigmata are best seen in very young larvae, 

 in which they are placed so, that we look 'm the cup. 



The pseudostigma is oval, slightly concave, in very young larvae 

 turned upward (fig. 10), in older larvae turned backward, so 

 that in this instance it is very difficult to discern their oval and 

 concave structure. The pseiuìosiigmatic or(jan is long, shaped like 

 a hair. 



The maxillar palp has four fi'ee joints. The third joint ends in 

 a bifid claw (Fig. 13); the fourth, which is planted on the inner 

 side of the third joint, ends in a broom of at least five claw-like 

 hairs. The bifid claws and the claw-like hairs are orick-red. 



The mandibles end in claw- like organs which are brick-red too. 



The Jii/popkari/ux or lingua, which was only visible in one of the 

 more than fifty specimens I saw, does not show (fig. 10) any 

 joints as in Ihromh. fuliginosum. 



The «urtrachee» is large, situated between the first and second 

 pairs of legs (fig. 11). The sack is on its base surrounded by a 

 chitinous ring (fig. 14). This ring may become oblong (fig. 15), 

 enclosing exactly the oblong-compressed bladder. 



With low powers it seems that the animal is monodactyl. It is 

 however tridactyl. Fig. 16 and 17. represent the distal end of 

 tarsus 1; fig. 18 of tarsus 2, and fig. 19 of tarsus 3, drawn under 

 2800 linear magnifying powei's. The middle claw is at least 15 

 or 20 times stronger than the almost invisible lateral ones. The 

 lateral claws of the 2d pair (lig. 18) are a third smaller than the 

 midle one. 



Habitat: on Diptera. 



Putria: Netherlands. 



