ZOOLOGY AND BOTANY, MICKOSCOPY, ETC. 33 



Pests of the Hop.* — F. W. Theobald discusses the hop aphis 

 (Pkorodon hamuli), earwigs, a spring-tail (Entomobrya nivalis), the hop 

 red spider (Tetranychus althanc), millipedes, and eelworms. 



Monograph on Myrientomata.t — A. Berlese establishes an order of 

 Myrientomata for certain primitive genera — Acermtomon Silv., Acer- 

 mtulus BerL, and Eosentomon Berl. The first two genera, which form 

 the family Acerentoinidae, are destitute of tracheae or stigmata. This 

 order of primitive forms presents most affinity with the Pauropod 

 Myriopoda. Berlese gives a detailed monographic account. 



f- Myriopoda. 



New Scutigerella.J — A. D. Imms describes Scutigerella subungui- 

 culata sp. n. from the Himalayas. It is closely allied to S. unguiculata. 

 This is the second record of the Symphyla from India. On account of 

 the phylogenetic importance of Symphyla among Myriopods the dis- 

 covery of an isolated new species has more than average interest. 



5. Arachnida. 



Structure and Development of Mites. § — Euzio Reuter has made a 

 detailed study of Pedicuhrpsis graminum, and has used this as a basis for 

 a general treatment of the structure and development of Acarids. We 

 have indeed a very important monograph on mites, to which we must 

 direct the attention of specialists. His discussion of the epimorphosis 

 (not metamorphosis) is very valuable. He proposes a new system of 

 sub-orders— Gamasiformes, Trombidiformes, Sarcoptiformes and Erio- 

 phyiformes. He finds the nearest affinities of Acarina in Pedipalpi 

 (Uropygi). 



Swiss Tardigrada.|| — J. Ammann gives a short account of Macro- 

 bint us pol ych set us sp. n., and discusses the occurrence of other Tardigrada 

 in Switzerland. He has found nine species of Macrobiotus and three of 

 Echiniscus. 



f. Crustacea. 



Minute Structure of Respiratory Organs in Crustaceans. % — 

 A. Bernecker has made a comparative histological study of the respira- 

 tory structures in BrancJtipus, Apus, Daphnia, Cyclops, Gammarus, 

 Phronima, Asellus, Oniscus, Porcellio, Astacus, Pagurus, Argulus, 



Li in til us, and some other forms. 



Phylogeny of Atyidae.** — E. L. Bouvier shows the nature of the 

 steps which may have led to the evolution of the Atyidae from the 

 Acanthephyridas. The primitive family Acanthephyridas is now abyssal, 

 but there were formerly littoral representatives, which became adapted 

 to fresh-water conditions. 



* Journ. Board of Agriculture, xvi. (1909) pp. 617-28 (3 pis.), 



t Redia, vi. (1909) pp. 1-182 (17 pis. and 14 figs.). 



% Journ. Linn. Soc, Zool., xxx. (1909) pp. 252-5 (1 pi.). 



§ Acta Soc. Sci. Fennicffi, xxxvi. (1909) pp. 1-287 (6 pis.). 



I! MT. Naturf. Ges. Bern, 1909, pp. 1-15 (2 figs.) 



•J Zool. Jahrb., xxvii. (1909) pp. 513-630 (4 pis. and 1 fig.). 



** Comptes Rendus, cxlviii. (1909) pp. 1727-31. 



Feb. 16th, 1010 d 



