1897] SOME NEW BOOKS 425 



at a glance what forms have been described from different parts of the 

 main area. 



En passant we may note two accidental mistakes — the first that a 

 number of rodents from Mashonaland, described by Mr de Win ton in 

 189G, have been wrongly credited to the present reviewer, and the 

 second that by a confusion of two similar names, the marsupial 

 Thylamys rani, of Trinidad, appears as a rodent in the genus 

 Ti/lomys. 



We may express a hope, in conclusion, that this invaluable list 

 will not be allowed to come to an end without having a good index 

 appended to it, at least of the genera names and their synonyms (with 

 page, not number, references), as this will enormously increase the 

 facility of its use, and will make it really worthy of its claim to be 

 Edifio complrta. 0. T. 



Parasitic Flies 



Revision of the Tachinidae of America North of Mexico. By D. W. Coquillett. 

 Pp. 15-4. "Washington. 1897. (U.S. Department of Agriculture, Division of 

 Entomology. Technical Series, No. 7.) 



Like most of the publications of the admirable Washington depart- 

 ment, this work will be welcomed both by the systematic student and 

 the practical farmer. The flies described are parasitic on various 

 insects, usually on the caterpillars of moths, hence they play an 

 important part in keeping the numbers of injurious species within 

 bounds. The work contains tables of the parasites with their hosts 

 and the hosts with their parasites, together with synoptical tables, 

 and full descriptions of all the Nearctic genera of species. As most of 

 the genera are identical with those of Europe, the monograph should 

 be valuable to dipterologists generally. We notice with regret that 

 there are no illustrations. In the study of so difficult a family, a few 

 figures of structural details would be of great help to the beginner. 



Further Literature Received 



Das Kleine Botanische Practicum, E. Strasburger, ed. 3 : Gustav Fischer. Bau und 

 Leben unserer Waldbiiume, K. Biisgen : Gustav Fischer. The Span of Gestation, J. 

 Beard : Gustav Fischer. Wild Traits in Tame Animals, L. Robinson : Blackwood. La 

 Face de la Terre, French Trans, of Suess, Das Antlitz der Erde, by E. de Margerie, vol. 

 i. : Colin, Paris. The Living Substance as such and as Organism, Mrs E. A. Andrews : 

 Ginn, Boston. Cheltenham as a Holiday Resort, S. S. Buckman ; Norman, Sawyer & 

 Co : Cheltenham. 



On some European Slugs of genus Arion, and on two new species of Parmarion, 

 W. E. Collinge : Proc. Zool. Soc. On Flow-Structure in an Igneous Dyke, and on Augite- 

 diorites, by T. H. Holland : Rcc. Gcol. Surv. India. A Dictionary of the Call Notes of 

 British Birds, C. L. Hett. Field Columbian Museum, Papuan Crania, G. A. Dorsey. 

 Ratzel's History of Mankind, pts. 21, 22: Macmillan. U.S. Dej)t. Agriculture, 

 N. Amer. Fauna, No. 13. Concilium Bibliographicum, cards relating to Nat. Sci. 



Amer. Geol., Nov.; Amer. Journ. Sci., Nov.; Amer. Nat., Nov.; Botan. Gaz., Oct.; 

 Feuille des Jeunes Nat., Nov.; Irish Nat., Nov.; Journ. School Geogr., Oct.; Literary 

 Digest, Oct. 16, 23, 30, Nov. 6 ; Naturae Novit., Oct.; Naturalist, Nov.; Nature, Oct. 

 21, 28, Nov. 4, 11, 18 ; Naturen, Oct.; Photogram, Nov.; Psychol. Rev., Nov.; Rivista 

 Quindicinale di Psichologia, vol. i., fasc. 9, 11 (Sept., Oct.) ; Revue Scientifique, Oct. 16, 

 23, 30, Nov. 6, 13 ; Science, Oct. 8, 15, 22, 29, Nov. 5 ; Scientific American, Oct. 9, 16, 

 23, 30, Nov. 6 ; Scot. Geogr. Mag., Nov.; Scot. Med. and Surg. Journ., Nov.; Vic- 

 torian Nat., Sept., Oct.; Westminster Rev., Nov. 



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