THE society's NOTE-BOOKS. 261 



Nycteribia from Bat. — This parasite is very uncommon. I 

 had a large quantity of bats brought me from one hole in a tree, 

 and on looking over them I found any quantity of Pteroptus^ Der- 

 manysus^ and odd Piilex ; but on only one specimen were there 

 any NycteribicE^ and on that eight only were found. 



J. Beaulah. 



The Nyderihia shows its relation to the Diptera by the rudi- 

 ments of wings, which may be seen like a pair of curved combs 

 on the meso-thorax, near the base of the pro-legs. I believe the 

 Nyderibia is eyeless, and that its tiny head consists almost entirely 

 of mouth-organs. 



F. J. Allen. 



Aclysia Dytisci is of much interest to me, departing, as it 

 does, so much from the ordinary type of a mite. There can be 

 no doubt that it does really belong to the order Acarina. I 

 cannot see any Crustacean character about, as has been suggested 

 by Mr. Underhill. It must be a very difficult job to get the 

 mites off the beetle, and it is certainly no easy thing to mount 

 them when secured. I have now before me four specimens 

 mounted in different ways, and I notice that they possess only 

 three legs between them. 



I have made an attempt to restore a specimen of Aclysia from 

 all the specimens. PI. XXL, Figs. 9 — 11, is the result. The 

 mouth seems to be a suctorial disc. All the specimens that I 

 have seen had only six legs ; this most probably proved them to 

 be immature. The legs are just like those of other aquatic mites, 

 and most probably they terminate with a couple of claws, but 

 they cannot be seen on any of the specimens. The eyes are four. 

 Palpi conspicuous and armed with spines. 



T. Ball. 



[In Mr. Ball's drawings, only six legs are shown. — Ed?\ 



Bird-Fly, Ornithomyia.— A fly very similar to this is very 

 common in India, and is there called the Bot-fly. Horses, and in 

 fact all animals, are much troubled by it ; the former most so. 

 The flies congregate below the anus, and are a source of great 

 annoyance to the horse, as the tail cannot touch them. They 

 have to be removed by hand, and as each is pulled off it leaves a 

 drop of blood. They fly with great rapidity, and it is very diffi- 

 cult to catch them. Some call them " Flying Ticks,'^ from their 

 similarity to that creature, 



H. Basevl 



