72 A. e. OUDEMANS, NOTES OS ACARI. 



Gamasid). He stili more becomes entangled as he »once found 

 a curions intermediate form between larva and adult." The figure 

 of this »intermediate form« shows us a nympha of a Tarsonemid^ 

 most probably Tarsoiiemus kirchneri (Kram.). 



He also examined Tilia on whicli he again found »larvae« 

 and »adults«. The description and figure of this latter, which 

 be has named Flexipalpna tilias, betrays a Tetronychus^ most 

 probably T. pilosus Can. et Fanz, for its hairs are planted on 

 little warts. 



The history of Scheuten is very instructive ; it shows us 

 that we can not be careful enough in our conclusion concer- 

 nino- the relation of mites which are found in the same locality ! 



DoNNADiEU (Recherches pour servir à l'histoire 

 d e s T é t r a n i q u e s, Thèse, Lyon, 1875) in general approbates 

 Scheuten. He however goes much farther, examining scrupul- 

 ously all stages of eggs and young ones, carefully describing 

 and delineating them, but alas he falls in the snares laid 

 down by Nature itself. He confounds the eggs and young ones, 

 or at least he enterprets wrongly his observations and comes to 

 the conclusion that in I'ttrom/chidae there are two modes of 

 reproduction, one direct one and one agamic one ! The first 

 mode is common to Tenuipalpus, Brevipalpus and Teironi/chus, 

 the second one to Phytocoptes. 



With Phytocoptes Donnadteu now does not mean the Phyto- 

 coptes of DuJAiiDiN (the so called »larvae^, at present known 

 as Eriophyes von Siebold), but in fact nothing else but our 

 common Tetronyclats telarius (L.) (vide his fig. 95 — 106) ! 



The reproduction of Phytocoptes according Donnadieu is as 

 follows: in spring he found on the underside of the developing 

 leaves males and females which couple. The impregnated female 

 bores with the mandibles a hole in the leaf, in which she lets 

 flow a little spittle, which causes a gall or a hypertrophy of 

 epidermic hairs (an erineum). In the neighbourhood she lays 

 an egg. The larva is the tetrapodous inst'ct, called Eriophyes 



