64 



a. Rückenscbikl nicht sculptirt .... 3. 



b. Rückenschikl ruit dicht schlangeuschup- 

 piger Grundsculptur 4. 



a. Aii der Bauchseite zwischen den Füssen 

 ein schuppig sculptirtes Schildchen . Liponyssus Klti. 



b. An der Bauchseite zwischen den Beinen 

 ein liiugliches, entweder langlich- oder 

 seltener schuppig-sculptirtes Leder- 

 schildchen, welches der Quere nach 

 gebrochen ist Ichoronyssus Klti. 



a. Au der Bauchseite zwischen den Hinter- 

 füssen ein sehr kleines Schildchen . Macronyssus Klti. 



b. An der Bauchseite ein kleines Schildchen Lepronyssus Klti. 

 a. Rückenschild durch eine Querteilung 



gebrocheu Steatonyssus Klti. 



I b. Rückeuschild dreiteilig Pimelonyssus Klti. 



Remarks. Ad \b aud hb. I am convinced that Kolenati's 

 Pimelonyssus is based only on nymphs, and that his words : 

 » Rückeuschild dreiteilig; die eiuzeluen Teile von verschiedener 

 Grundsculptur" must be explaiued as follows: ïhere are two 

 dorsal shields, at some distance from each other, the space 

 between these shields is wrinkled (see my figg. 36 and 38 on 

 Plate II). This is confirnied by Kolenati's own words (1. c. 

 p. 188): »der mittlere Teil düun, lederig-wellig" and (1. c. 

 p. 189): »der mittlere Teil am Discus mit 4 im Viereck stenen- 

 den runden Grübcben". 



Ad 3a. Here Kolenati seems to have meant a sternal shield 

 between the coxae 1 and 2 (in which case his mites were females) 

 or amidst the coxae, in which case his mites were nymphae 

 (see fig. 37). 



Ad 3b. Kolenati has probably meant two shields : a sternal and 

 a genital one; and his mites may have been females or males. 



Ad. 4a. This must have been a genital shield, and his mites 

 must have been females, but then Kolenati has overlooked the 

 sternal shield. 



