September 20, 1912] 



SCIENCE 



377 



SCIENTIFIC JOVRNALS AND ABTICLE8 



The July number (volume 13, number 3) 

 of the Transactions of the American Mathe- 

 matical Society contains the following papers : 



J. B. Shaw : ' ' Quaternion developments Tvith 

 applications. ' ' 



H. S. Vandiver: "Theory of finite algebras." 



Dunham Jackson : ' ' On the degree of converg- 

 ence of the development of a continuous function 

 according to Legendre 's polynomials. ' ' 



Louis Ingold: "Functional differential geom- 

 etry." 



E. B. Van Vleck: "On the extension of a the- 

 orem of Poincar^ for difference equations. ' ' 



E. B. Van Yleck: "One-parameter projective 

 groups and the classification of collineations. " 



J. E. Eowe: " Bicombinants of the rational 

 plane quartic and eombinants of the rational plane 

 quintie. ' ' 



The closing (July) number of volume 18 

 of the Bulletin of the American Mathematical 

 Society contains: Keport of the April meet- 

 ing of the Society, by F. N. Cole ; " Proof of a 

 theorem due to Picard," by W. R. Longley; 

 Review of Ohwolson's Traite de Physique, by 

 E. B. Wilson ; " Arithmetique Generale," by 

 E. Dumont and 'N. J. Lennes; Shorter 

 Notices: Muir's Determinants, by G. A. 

 Miller; Cohen's Lie Theory of One-Parameter 

 Groups, by E. J. Wilezynski; Miiller's Abriss 

 der Algebra der Logik, by L. I. ISTeikirk; 

 Andoyer's Cours d'Astronomie, by Kurt 

 Laves ; " Notes " ; " New Publications " ; List 

 of papers read before the society and subse- 

 quently published; Index of Volume 18. 



NOTES ON ENTOMOLOGY 

 Some years ago Dr. T. Sjostedt made a col- 

 lecting trip to the high mountains of East 

 Africa. The results of nearly a year's collect- 

 ing in that region were gradually published, 

 and now have all been brought together in 

 three volumes.^ Dr. Sjostedt collected over 

 50,000 specimens of insects, belonging to about 

 3,500 species, of which over 1,200 were new 

 ' ' ' Wissenschaf tliche Ergebnisse der Sehwedi- 

 schen Zoologisehen Expedition nach dem Kili- 

 mandjaro, dem Meru, und dem umgebeudeu Mas- 

 saisteppen Deutseh-Ostafrikas, 1905-1906, unter 

 Leitung von Professor Dr. Tngve Sjostedt," 

 Stockholm, 1911, 4to. 



species. Many new genera and several new 

 families have been erected upon this material, 

 one of the richest insect collections ever 

 brought from Africa. 



A NEW entomological journal is the Ento- 

 mologische Mitteilungen issued by the Deut- 

 sche Entomologische Museum, under the direc- 

 tion of Drs. S. Schenkling and C. Schaufuss. 

 It is to be a monthly, and will contain papers 

 on all orders of insects, but doubtless a ma- 

 jority will be on beetles. The first number 

 contains a short history of the Deutsche Ento- 

 mologische Museum, the only purely entomo- 

 logical museum in the world. With this new 

 publication the museum abandons its previous 

 quarto journal. 



One of the results of the Belgian exploita- 

 tion of the Congo was a Congo Museum, lo- 

 cated near Brussels. This institution has now 

 begun the issuance of a journal. Revue Zool- 

 ogique Africaine, edited by the curator of the 

 museum, Dr. H. Schouteden. ,Jt is to be is- 

 sued irregularly; two fascicles have appeared, 

 and are largely occupied with entomological 

 articles treating all orders of insects. 



Dr. E. M. Walker, who for some years has 

 been studying the dragonflies of the genus 

 ^shna, has now published his results.' It is 

 a most painstaking and excellent work. There 

 is a considerable amount of biologic informa- 

 tion about these insects in the early part of 

 the article, as well as figures of the character- 

 istic parts of the nymphs. The author recog- 

 nizes and gives complete descriptions of 16 

 species, most of which are confined to the 

 northern parts of the United States and Can- 

 ada. Several of the plates represent the 

 markings of the body in color. 



The position of the flies of the family 

 Phoridse in the system of the Diptera has been 

 a subject for discussion for many years. It 

 has generally been considered as on the border- 

 land between the two main divisions of the 

 order, put sometimes on the one side, some- 

 times on the other. Now Dr. D. Keilin has 



= ' ' The North American Dragonflies of the Genus 

 JEshna," Univ. of Toronto Studies, No. 11, pp.. 

 213, 28 plates, 1912. 



