Number 63 January 5, 1919 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



RESULTS OF THE UNIVERSITY OF MICHIGAN- 

 WILLIAMSON EXPEDITION TO COLOMBIA 

 1916-1917^ 



III. Archaeogomphus, a New Genus oe Dragon-flies 

 (odonata)- 



By E. B. Williamson 



In Occasional Papers of the Museum of Zoology, Number 

 59, June 24, 1918, I described a new dragonfly which, after 

 ^some hesitation, was referred to the genus Agriogomphus, and 

 the species was named hamatus. In that paper, page 3, I re- 

 ferred to the fact that I had written to Dr. Ris to have a 

 photograph made of de Selys' type, if this were possible. 

 Fortunately through the kindness of Mons. Severin and Dr. 

 Ris I now have this photograph, and it is evident at once that 

 the Agriogomphus of Needham, Ris and myself, has nothing 



1 A Collecting Trip to Colombia, South America, Misc. Publ. Mus. of Zool., 

 Univ. of Mich., No. 3, February, 1918. 



''I, Geo. Papers. Mus. of Zool. No. 52; II, /. c, No. 59 



