157 



May 23rd, 1904, and Friedrich Moritz Brauer on Dcct-nilxT 

 29th, 1904. The principal entomological work of both lay outside 

 the Odonata, although Brauer did more synthetic work in this 

 order than M'Lachlax, especially on the Libelluiinie; but both 

 have left their impress on the taxonomic and faunistic literature. 

 Alpheus S. Packard, who died February 14th, 1905, was still 

 less deeply concerned with the Odonata, but he was a distin- 

 guished entomologist, and he is to be remembered for his mor- 

 phological work on the thoracic sclerites and the ovipositor of 

 the dragonflies. Still more recently have we had to record the 

 deaths of H. W. van der Weele on August 29th, 1910. and oí 

 Samuel H. Scudder on May 17th, 1911. Van der Weele's 

 work has already been noticed ; Dr. Scudder wrote on the 

 Odonata of the White Mountains of New Hampshire and of the 

 Isle of Pines, before he began those palieoentomological studies 

 w'hich have so largely contributed to his reputation, and which 

 included careful original accounts of American Tertiary Odonata. 



In conclusion, what has chiefly contributed to the progress 

 of Odonatology during the period under review is the applica- 

 tion of the developmental method as a means of tracing the 

 origin, and so comprehending the significance, of the various parts 

 of the Odonate's body. If the application of this method to these 

 insects seems to students of other animal classes to have been 

 slow, the excuse must be the great number of insect forms, the 

 consequent great mass of detail to be mentally digested, and 

 the relativelv smaller number of investigators. 



(In order not to unduly extend this paper, no bibliography 

 is appended. The dates placed after each author's name will 

 enable any one desiring to consult the original memoirs to find 

 them by referring to the Concilium Bibliographiciim, the Zoolo- 

 gical Record, or the International Catalogue of Scientific Literature, 

 Zoology, for the appropriate \'ears.) 



