Number 77 March i, 1920 



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^ 



V. Notes on a Few Species oe Progomphus 

 • (Odonata)- 



By E. B. Wiujamson 



The following notes deal with specimens of Progomphus 

 collected by me in Guatemala in 1909, and by J. H. Williamson 

 and myseU in Colombia in 1916. A new species from Guate- 

 mala is described. 



With the new species of Progomphus described in this pa- 

 per, twenty-three species of the genus are now known. Kirby 

 lists eleven species in his Catalogue. The elevation of borcalis 

 to its proper specific rank makes the number twelve. In the 

 Bio. Cent. Amer., p. 150, Calvert describes P. clcndoni, and in 



^ A Colleining Trip to Colombia. South America, ■Miscellaneous Publications, 

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



2 I. Occ. Papers, Mus. of Zool., Univ. of Mich.. No. 52, April 77. 1018. Tl. 

 ibid.. Xo. 59, June 24, 191S. Ill, ibid., No. 63 January 5, 1919. IV, ibid., No 

 68, April 24, 19 19. 



