vi University of Michigan 



No. 52. Williamson. E. B.— Results of the University of Michigan- 

 Williamson Expedition to Colombia, 1916-1917. I. Two Interesting 

 New CoIoml)ian Gomphiiies (Odonata). (2 plates.) 



No. 53. Andrews, A. W. — Diptera Collected on Whitefish Point, Chip- 

 pewa County, Michigan. 



No. 54. McAlpine. W. S. — A Collection of. Eepidoptera from White- 

 fish Point, Alichigan. (i map.) 



No. 55. Rogers, J. Speed. — A Collection of Tipulidae from School- 

 craft County, Alichigan. 



No. 56. Fowler, Henry W. — Fishes from the Middle Atlantic States 

 and \'irginia. (2 plates.) 



No. 57. Swales, Bradshaw H. — The Purple Sandpiper at Cleveland, 

 Ohio. 



No. 58. Walker, Bryant. — Foreign Land Snails in Michigan. 



No. 59. Williamson, E. B. — Results of the University of Michigan- 

 Williamson Expedition to Colombia, 1916-1917. II. A New Species 

 of Agriogomphus (Odonata). (2 plates.) 



No. 60. Fowler, Henry W. — A Review of the Fishes Described in 

 Cope's Partial Catalogue of the Cold-Blooded Vertebrata of Mich- 

 igan. ( 13 plates.) 



No. 6r. Hine, James S. — Notes on Robber Flies from Southwest 

 Texas, Collected by the Bryant Walker Expedition, with a Descrip- 

 tion of a New Species of Erax. 



