Macaw _Macropus viridi-auratus_ _Maia_ Magpie Man's industries Marchal, P. Marmot Martin, H. T. Mason-bee McCook _Megachile_ _Melanerpes erythrocephalus_ _Melanerpes formicivorus_ _Meles_ _Melicourvis baya_ _Melipona geniculata_ Merlin Moggridge _Molothrus_ _Monedula punctata_ Morgan, C. L. Morgan, L. H. Mouse Mueller, Fritz Mueller, P. W. J. _Mus minutus_ Musk-rat _Mygale henzii_ _Myrmecocystus_ _Myrmica_ Natural history and the natural sciences Naturalist of yesterday and to-day Naumann _Necrophorus_ Nests _et seq._ _Oecodoma_ _Opossum_ _Orthotomus longicauda_ _Orycteropus_ _Osphronemus olfax_ Otter Oven-bird Owl _Pagurus Bernhardus_ Pallas Paradise-fish Parroquet Parseval-Deschenes Paterson, W. Pea-crab Pelican, Brown Perch _Pholcus_ _Phryganea striata_ Physiological reserves _Pinnoteres pisum_ _Pogonomyrmex barbatus_ _Polyborus lutosus_ _Polyborus cheriway_ _Polyergus rufescens_ _Pompilius_ Poppig Preyer Projectiles, hunting with _Protopterus_ _Psammomys_ _Pseudaetus_ Python's ambush Quelelis _Quiscalus major_ Raven Reaumur _Rhodius anarus_ Romanes Rook Saint-Hilaire, G. St. John, C. Sand-wasp Sanitation of dwellings _et seq._ Saussure, H. de Scarabaeus Sea-gulls Secretary-bird Sentinels Severn, H. A. Sewing among birds Shrike Simon, Eugene _Sitaris muralis_ _Sitaris colletis_ Slavery among ants Smeathman Snake Sparrow-hawk _Sphex_ Spider Spider-crab Sponge-crab Squirrel _Staphilinus Caesareus_ Stickleback _Strigops habroptilus_ Sturgeon Swallow's nest Sykes _Sylvia atricapilla_ Tailor-bird Tennent Termites Thomson, J. A. Tiger-beetle Titmouse Toad Tortoise _Toxotes jaculator_ Trap-door spider Tristram _Troglodytes calvus_ Tschuedi Tyrant-bird _Uranoscopus scaber_ _Vespa sylvestris_ Vizcacha Vole Wasp Waterton Weaver-bird Wodzicki Wolves Woodpecker Woven dwellings _Xylocopa violacea_ THE WALTER SCOTT PRESS, NEWCASTLE-ON-TYNE. The Contemporary Science Series. EDITED BY HAVELOCK ELLIS. I. THE EVOLUTION OF SEX. By Professor PATRICK GEDDES and J. ARTHUR THOMSON. With 90 Illustrations. Second Edition. "The authors have brought to the task--as indeed their names guarantee--a wealth of knowledge, a lucid and attractive method of treatment, and a rich vein of picturesque language."--_Nature_. II. ELECTRICITY IN MODERN LIFE. By G. W. DE TUNZELMANN. With 88 Illustrations. "A clearly-written and connected sketch of what is known about electricity and magnetism, the more prominent modern applications, and the principles on which they are based."--_Saturday Review_. III. THE ORIGIN OF THE ARYANS. By Dr. ISAAC TAYLOR. Illustrated. Second Edition.