THE society's NOTE-BOOKS. 301 



pair of legs are inserted into the walls of the abdomen, thus 

 giving great power of propulsion to these limbs. E. Bostock. 



My friend, Mr. Bostock, having granted me the privilege and 

 pleasure of examining his slides and notes before their circulation, 

 I feel constrained to express my gratification, and also to congra- 

 tulate the P. M.S. that they have such a worker. If every member 

 pays as much attention to them as I have done, he will not find 

 the usual time too long for their investigation. There is so much 

 of interest and novelty, and it is no slight privilege to have a peep 

 at good mounts of rare, and even as yet undescribed, creatures. 

 I wish Mr. Bostock had given a minute and detailed account of 

 his raid on a good savage ants' nest. The idea makes me shiver. 

 Bees are bad enough ; but ants — ugh ! 



Uropoda formicarise (Fig. i) is a very fine species and well 

 worth figuring. I know Mr. Tuffen West is no longer to be num- 

 bered amongst the members, but I hope that his mantle has fallen 

 on some other member, who will find plenty of employment for 

 .his pencil whilst the box is with him, or I would suggest that some 

 photographic member should do his best with these mounts. 



Uropoda canestriniana is a much smaller, but equally distinct 

 species. 



TJropoda coccinia is described and figured by Mr. Michael in 

 his paper on the " Association of Gamasids with Ants " in the 

 Proceedings of the Zoological Society, Dec. i, 1891. 



The two next Uropodas are small, but very distinct and beau- 

 tiful species, well worthy of being figured. One thing strikes me, 

 and that is that all these new species are so different in form and 

 so much smaller than the old ones, with which one is so familiar, 

 such as Vegetans, Cassideces, etc. 



Laelaps equitans. — This beautiful mount reminds me of one of 

 Z. hilaris, and Koch says that these mites live a very long time in 

 captivity, but are never still. When Koch wrote, only four species 

 of Lgelaps were known. All these were parasitic on mites, and all 

 of them were very similar in figure. In this box we have no less 

 than five species, all diftering from those he described, and the 

 four last of them not giving one the idea at first sight that they 

 belonged to Lcelaps at all. I wish I had a good English transla- 



