Number 59 _ June 24, 1918 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan. Published by the University. 



RESULTS OF THE UNR^ERSITY OF MICHIGAN- 

 WILLIAMSON EXPEDITION TO COLOMBIA 

 1916-1917^ 



II. A New Species of Agriogomphus (Odonata)- 



By E. B. Williamson 



The genus Agriogomphus was described by de Selys in 

 1869.^ Four years later, in* 1873,* in describing Cyanogom- 

 phus, he took the opportunity of making some corrections and 

 additions to the original description. Since then the genus 

 has been identified but two times, in 1903 by Needham,^ and 



^ A Collecting Trip to Colombia, South America, Miscellaneous Publications, 

 Museum of Zoology, University of Michigan, No. 3, February, 1918. 



'I. Two New Interesting Colombian Gomphines (Odonata). Occ. Papers, 

 Museum of Zoology, University of Michigan, No. 52, April, 1918. 



^ Secondes Additions au Synopsis des Gomphines. 



■• Troisiemes Additions au Synopsis des Gomphines. 



"A Geneologic Study of Dragon-fly Wing Venation. Proc. L'^. S. Nat. Mus., 

 Vol. XXVI, p. 738, fig. 27. Of the specimen which served for the figure. Pro- 

 fessor Needham has written me: "Adolph Hempel sent it to me from somewhere 

 in Brazil. It was a fragment of a teneral specimen, rolled up in a ball and un- 

 recognizable. I boiled it and obtained two nearly perfect pairs of wings. The 

 specimen lacked the head and the apex of the abdomen and was in such bad con- 

 dition that I did not preserve it." 



