Vol. XXvii] ENTOMOLOGICAL NEWS. 383 



entomological contributions. He was born in Xeustrelitz, 

 December 14, 1848, and studied at Gottingen and Leipzig. A 

 brief notice of his life, chiefly from the geographer's stand- 

 point, is given in Petennann's Mitteilungen, Ixi, 315. 



LUCAS FRIEDRICH JULIUS DOMINIKUS VON HEYDEN, who 

 died September 13, 1915, at Frankfurt am Main, is the sub- 

 ject of an appreciative obituary notice and portrait in the 

 Entomologische Blatter (Berlin) for December 30, 1915. Von 

 Hey den was born in Frankfurt, May 22, 1838, and spent most 

 of his life in that city, although he made entomological ex- 

 cursions into Spain, Portugal, Croatia, Slavonia and Bosnia, 

 as well as in the neighborhood of his home. His associates 

 included Reitter* and Hopffgarten, the coleopterists, Saal- 

 miiller (whose work on the Lepidoptera of Madagascar he 

 completed), Moritz Schmidt, Oskar Bottger and Albrecht 

 Weiss. He devoted himself chiefly to palaearctic insects, ac- 

 cumulating a collection of 20,000 species, chiefly Coleoptera. 

 By an agreement with the late Dr. Kraatz, his beetles go to 

 the German Entomological Museum in Berlin ; his other insects 

 he presented to the Senckenberg Naturforschenden Gesell- 

 schaft in Frankfurt, which in June, 1911, established the Karl 

 and Lucas von Heyden Fund (after father and son), of 50,000 

 marks, the income of which is expended for scientific publi- 

 cations. Von Heyden was the author of more than 350 papers 

 and was very generous in loaning material from his collection 

 to various specialists. 



ELIE METCHNIKOFF, who died in Paris, in an apartment of 

 the Pasteur Institute, of which he was Sub-director, on July 

 15, 1916, was chiefly known in recent years for his researches 

 into the causes of old age, into various human diseases and 

 into the functions of the white blood corpuscles. But as a 

 note in the NEWS for February, 1915 (page 83), pointed out, 

 he had, in the third decade of his life, devoted much time to 

 investigations on the terrestrial Arthropods. Such were his 



*K(lmuml Rcittcr celebrated his 7<>th birthday on Oct. 22, 1915. 



