(db. a, c. oudemans) notes on acabi. 183 



upon dermal protuberances. Purposely I have abandoned to delin- 

 eate the legs of the left side. 



Nympha. Koch in his Deutschland's Crustaceen Myriapoden und 

 Arachniden , has already figured it under the name of Oppia glau- 

 cina , but his specimen was totally deprived from its hairs , perhaps 

 by rough manipulation. And indeed the hairs are as brittle as 

 glass. As to the colour of the animal Koch has exaggerated its hue ; 

 the so-called céphalothorax (prosoma) is too brick-red , the so-called 

 abdomen (metasoma) too sap-green ; in reality the animal is totally 

 louse-coloured with a greenish hue; it may be however that any 

 food colours the prosoma and the legs with a more reddish hue, 

 like Koch's specimen shows in his drawing. 



Fig. 19 shows us a nympha more correct than Koch's drawing , 

 but at once one may recognize the same animal. 



The prosoma is granulated, like the whole skin of the larva, 

 but the metasoma is I'eticulated. Here is no distinct furrow between 

 the thorax and the abdomen , but like in other Acari only between 

 the prosoma and the metasoma. 



Four little curved hairs are planted on the fore-part of the 

 prosoma (on the snout), four larger bristles on the fore-part of 

 the metasoma nearly exactly in a line, followed by four of the 

 same thickness and length, nearly exactly in a line, then three 

 times again four long bristles but each time they are less thick 

 and a little smaller in length , and finally two long setae on the 

 hindmost end of the metasoma. 



The pseudostigmata and the pseudostigmatic organs are exactly 

 like those of the larva. 



The femores have still their cylindrical form whilst those of the 

 imago have their distal ends swollen : getiiculis femorum globosis 

 DE Geer, Linné. 



Imago. The imago in known enough by the descriptions and 

 figures of the different authors who wrote on it. The cuticle is 

 polished , not reticulated. The pseudostigmatic organs are like those 

 of the larva and nympha, but I don't observe on them the trans- 

 parent globular dew-drop shaped covering. 



