50 REPORT OF NATIONAL MUSEUM, 1919. 



On his return to the United States he resumed his artistic work, 

 and in 1889 went to Munich, where he studied art for two years, after 

 which he established a studio in Chicopee, where for several years he 

 made landscape painting his profession. 



During all this time he continued his study of the biologies of 

 North American beetles with Doctor Dimmock, and through the 

 latter, in 1903, secured the work of studying the life histories of the 

 New England species of mosquitoes for the monogi'aph of the mos- 

 quitoes of North and Central America and the West Indies, then 

 undertaken by Dr. L. O. Howard under a grant from the Carnegie 

 Institution of "Washington. This led to the further employment of 

 Mr. Knab on the same project, during which he made several trips 

 to the Tropics, and his increased activities in the subject and excel- 

 lent work in making the drawings of the larA'ae for this book led 

 to his being made coauthor of the monograph with Doctore Howard 

 and Dyar. 



On October 26, 1910, he was made honorary custodian of Culicidao 

 in the division of insects, United States National Museum, and after 

 the death of ISIr. Coquillett he was made honorary custodian of 

 Diptera on September 1, 1911. 



Alwaj'S an earne>=t student, he soon attained preeminence in his 

 newly chosen field, especially in the subject of insect-borne diseases, 

 and the amount of Avork done by him may be judged b}^ the long 

 list of titles of articles which he published, as well as by the numer- 

 ous notes published on the discussions of articles read before the 

 Entomological Society of Washington, all of which show his breadth 

 of knowledge and deep perception into all entomological problems. 

 During the last years of his life although constantly sulfering from 

 an obscure tropical disease, probably insect-borne, which finally 

 caused his death on November 2, 1918, he was always cheerful and 

 ready to help others, and he lived to see completed the monumental 

 work on mosquitoes to which he had so gi'eatly contributed. 



The death of Mr. William T. Evans, at Glen Ridge, New Jersey, 

 on November 25, 1918, removes a benefactor to whom the National 

 Gallery of Art is greatl}^ indebted. By a series of donations, con- 

 tinuing through a period of some eight years, from March, 1907, 

 Mr. Evans presented to the Gallery what is regarded as one of the 

 choicest and best collections of contemporary American paintings 

 existing. This contains 150 paintings and 1 fire etching, represent- 

 ing 106 American artists, besides 1 bronze by an American sculptor, 

 and 115 examples of the work of 16 of the foremost American wood 

 engravers. The gift was made most unostentatiously, with the sole 

 purpose of establishing a gallery of American painting in the Na- 



