LOUSE MITES, 319 



CASE the same; their form and general appearance the same; they 

 are transversely striated like the Sarcoptidse ; both bear a number 

 of feathered bristles like those of Glyciphagiis ; they have a 

 somewhat similar disposition of claws — no caruncles — but a long 

 one with two short ones, while Myobia has a long one with 

 hairs approaching to spines, and the same form of legs, for 

 Kolenati figures a part of the leg, and that corresponds with 

 Dr. Maddox's, and both have the mandibles chelate. Kolenati 

 indeed speaks of a "pelotte," by which we understand a caruncle, 

 but his enlarged figure shows none. Maddox does not figure, 

 and no doubt did not observe the Pteroptine hairs figured by 

 Kolenati from his. species ; but they may have been there not- 

 withstanding. 



With such remarkable coincidences in unusual points of structure 

 it seems more likely that Kolenati has erred in regarding the number 

 of joints in the legs as the same as that of the Pteroptidae and 

 Dermanyssi with which he placed them, than that there should be 

 two types with the same unusual points of structure on the bat ; 

 the one with eight joints to the legs, and the other with five. It is 



Tarsus of Otonyssus. Leg of Otonyssus. 



Copied from Kolenati. Copied from Maddox. 



not difficult to see how this error may have originated. The last 

 joint in Dr. Maddox's figure of the leg is very long, and it has 

 more than one projection, which might easily be taken for the 

 margin of a joint, which would make the last joint short like 

 Kolenati's. As regards the difference in the number of joints of 

 the palpi, that may be merely a difference in the mode of calcu- 

 lation ; Kolenati reckoning the basal elevation, from which they 

 start, as a joint, which we do not; and their projecting away 



