502 



SCIENCE. 



[N. S. Vol. XIX. No. 482. 



antennal characters (allowing a good deal of 

 variation) were specific. Of course, it is quite 

 possible that the English insect is more vari- 

 able than the American ones, as is true of cer- 

 tain English plant genera, e. g., Buhus and 

 Hieracium. 



One of the best tests in all such cases is the 

 transplanting of specimens to different food- 

 plants. Mr. Newstead did this rather exten- 

 sively in the case of Pulvinaria rihesice, vyhich 

 he treats as a variety of P. vitis. It was found 

 that the P. rihesiw could not live on certain 

 plants which are normally infested by P. vitis, 

 and this, I think, should make one hesitate to 

 assume the identity of closely similar forms. 



Dactylopus walkeri, Newst., is evidently the 

 British representative of our D. neomexicanus, 

 the antennae and other characters being very 

 similar. In the figure accompanying New- 

 stead's original account of D. walkeri the last 

 antennal joint was apparently made too short. 



It is strange that no mention whatever is 

 made of Lecanium liriodendri, which was de- 

 scribed from English specimens. 



T. D. A. COCKERELL. 



SCIENTIFIC JOURNALS AND ARTICLES. 

 The Popular Science Monthly for March 

 opens with an article on ' Aerial Navigation,' 

 by O. Chanute, which gives a resume of what 

 has been accomplished up to the present. W. 

 LeConte Stevens discusses ' The Metric Sys- 

 tem : Shall it be Compulsory V intimating that 

 it must not be. J. Madison Taylor has a 

 second paper on ' The Conservation of Energy 

 in Those of Advancing Tears ' and Edward F. 

 Williams has the first of a series of articles 

 on ' The Koyal Prussian Academy of Science, 

 Berlin.' N. L. Britton describe.s ' The Trop- 

 ical Station at Cinchona, Jamaica,' and Edw. 

 D. Jones discusses ' Education and Industry,' 

 noting the changes that have taken place in 

 training for commercial life. O. E. Cook 

 presents a paper on ' Evolution Not the 

 Origin of Species,' holding that while evolu- 

 tion may change the character of species it 

 ■does not originate them, this being due to 

 vital motion. Lafayette B. Mendel gives 

 ' Some Historical Aspects of Vegetarianism ' 

 and Naohide Tatsu gives a sketch of ' Tokyo 



Teikoku Diagaku (Imperial University of 

 Japan).' 



The Museums Journal of Great Britain for 

 February contains an article on ' The Mu- 

 seum Question in Europe and America,' by 

 Ant. Fritsch, in which the author notes that 

 many undesirable features are to be found in 

 museum buildings through the undue influence 

 of architects. It is noted that most exhibi- 

 tion collections are too large and a plea is 

 made to have them of smaller size and greater 

 educational value. Alex. M. Rodger describes 

 ' A Method of Mounting Fish with Natural 

 Surroundings,' large, rectangular tardus being 

 employed and the fish preserved in formalin. 

 A meeting is noticed to consider ' The Organi- 

 zation of British Zoologists ' and the balance 

 of the number is filled with reviews and notes. 



We learn from the Journal of the American 

 Medical Association that Dr. K. Kjellberg, of 

 Stockholm, has commenced the publication of 

 a weekly medical journal, to be the official 

 organ for the General Swedish Medical Asso- 

 ciation. The title is Almanna Svenska 

 Ldkartidningen. The first two numbers con- 

 tain instructive articles on ' Arrhenius and 

 the Doctrine of Immunity ' and others on 

 Finsen treatment of lupus, paraffin prothesis, 

 etc. The list of collaborators on the journal 

 includes Professor E. Almqvist, J. Borelius, 

 H. Koster and seventeen others. The journal 

 Eira was previously the organ of this asso- 

 ciation, but it suspended publication on 

 the death of its editor. Dr. Simon, last 

 June. 



SOCIETIES AND ACADEMIES. 

 geological society, WASHINGTON. 



The one hundred and fiftieth meeting of 

 the society was held January 27. 



Mr. Wm. H. Dall read a paper on ' The 

 ]\Iiocene of Maryland and its Relations,' in 

 which the relations of the Chesapeake Miocene 

 of Maryland to that of Virginia, North Caro- 

 lina, Florida and the Miocene of central and 

 northern Europe were elucidated and discussed. 

 This paper will form a chapter in the forth- 

 coming report on the Miocene of Maryland, 



