63 



[ 9 maudibles nortnal; cf a style . . . StylochirusG. et R.Can. 



8 | Mandibles a pin with an appendage den- 



{ tate on outside Berlesia G. Can. 



9 Only one genus Neoberlesia Berl. 



Legs 1 norinal Neopodoeinum Ouclms. 



Legs 1 very long Podocinum Berl. 



10 



15. Liponyssus Klti. 



In 1859 Kolenati formed the genera Liponyssus (Sitzsb. d. 

 niath. naturw. Cl. Kais. Ak. Wiss. Wien, Vol. 35, p. 172), Ichoro- 

 nyssus (ibid. p. 173), Macronyssus (ibid. p. 178), Lepronyssus (ibid. 

 p. 180), Steatonyssus (ibid. p. 186) and Pimelonyssus (ibid. p. 188). 

 All the mites belonging to these genera, and drawn by him, 

 have the external features of those which belong to the genus 

 Leiognathus of Canestrini, 1885. 



Liponyssus setosus, the type of tb e genus Liponyssus, may be a 

 Laelaps, e. g. Laelaps arcualis (C. L. Koch) var. marginata (C. L. 

 Koch), though it is not likely. But as long as it is only a suppo- 

 sition, we have uo right to deny the relationship, or even the con- 

 formity, of Ly ponyssus to Leiognathus. 



All the species belonging to the above naraed genera and to 

 Leiognathus, may provisionally be placed in one genus, viz. 

 Liponyssus Klti, till the genus shall be broken up into two or 

 more subgenera, or genera, in which case we shall have to observe 

 that each of these genera has its proper type, which is insepa- 

 rable from its genus. 



The characters mentioned by Kolenati himself are too vague to 

 be understood, and this author seems to have been a careful 

 observer in some instances and a very inaccurate one in others. 

 I don't think it superfluous to give the following key to Kolenati's 

 genera : 



( a. Rückenschild einfach 2. 



' b. Rückenschild zwei- oder dreiteilio- . .5. 



