272 (db. a. C. OTTDËilAKs) A SAKCOPTJSB OF A BAT. 



implantations of a very small hair, and on the hind part of the 

 body nearly in the centre of the back , a brown edged split , which 

 prooved to be the anus. A dorsal anus, like in Notoedrus cati 

 HerinCt ! 



Fig. 8. Another specimen, though smaller, prepared from its 

 enclosure and treated with caustic kali, showed me that the animal's 

 hind legs have peculiarities yet unknown too in Psoricae , viz. the 

 third pair of legs has no ambulacrum nor a long hair, whilst the 

 fourth pair is provided with a long haii', whereas it is destitute 

 of an ambulacrum. The epimera are distinctly visible, and quite 

 behind those of the four fore-legs the skin shows transverse wrinkles; 

 here I suppose is situated the female genital opening. Four hairs 

 are visible on the ventral surface, one before each leg of the third 

 pair and one between the third and fourth pair of legs. 



Fig. 9. On the dorsal surface we observe two spots of im- 

 plantations of very little hairs not far from the head, which were 

 already discernable when the animal had not yet been treated with 

 caustic kali (see fig. 7). Further the anus, surrounded by six pairs 

 of very minute hairs , and a little behind the anus one single hair, 

 at least three times larger than the foregoing ones. Then , on a 

 level between the anus and this last hair , we observe on both sides 

 again three hairs , as minute as the other ones. On both sides 

 of the body a long cloud of very minute points is only discernable 

 by exactly focussing the microscope. 



Fig. 10. With high magnifying powers the clouds prove to be 

 triangular spines, a common appearance in Psoricae, but the 

 kind of dispersion of these spines on the body of the animal is 

 at least unknown in this group. 



Fig. 11. When we behold the head and the two pairs of fore-legs 

 with a strongly magnifying glass , we distinctly discern that the 

 epimera of the first pair of legs coalesce in the median line, whilst 

 those of the second pair of legs are free, showing a less chitinized 

 inner blade projecting inwards. The first and second joint of each 

 leg is tolerably short, but the third, fourth and fifth joint is 

 extremely short and not distinguishable one from another. Each 



