(du. a. C. OUDEMANS) LIST 01" DUTCH AC \ RT. 135 



a slight resemblance of such a protuberance. Tlien I examined 

 the Cheyleti of my collection, consisting of three other species viz. 

 Ch. eruditus , Noenieri and venustlssimus (this species I have not 

 yet found in our country). I have however not been able to dis- 

 cover eyes in the two former species, but to my great astonishment 

 I immediately found them in Cheijletus venustissimus , a species 

 which has so often been a subject of description! Fig. 13 shows 

 us the head (pseudocapitulum) and the cr shoulder » of this species. 

 Here we observe three hairs (which are feathered) and a lens-formed 

 (meniscoidal) chitinous thickening. This is the eye. Fig. 14 shows 

 us the «shoulder» of the animal seen obliquely, .so that the eye 

 has here a more marginal position, though in fact the eye in this 

 species is dorsal, but looks sideways. 



Arnhem , December , 26 , "1 896. 



P.S. 



Before the corrections of my la,st proof-sheels , I have been able 

 to consult Haller's and Karpelles' papers and Berlese's book 

 on Acari. 



I must confess that Haller already described eyes in his Chey- 

 letia laureata , 1 884 , and I believe that most probably two or 

 more species of the fan-bearing CheijUti are only synonyms , but 

 the result of this study will soon be mentioned in a separate paper. 



Arnhem, August, 17, 1897. 



