TABLE OF CONTENTS 



No. 62. Case, E. C.^A Mounted Skeleton of Edaphosaiints crucigcr Cope, 

 in the Geological Collection of the University of Michigan. (4 pages, 2 plates.) 



No. 63. Williamson, E. B. — Results of the University of Michigan- 

 Williamson Expedition to Colombia, 1916-1917. III. Archaeogomphus, 

 a New Genus of Dragon-Flies (Odonata). (6 pages, i plate.) 



No. 64. Walker, Bryant. — A New Species of Camptoceras. (5 pages, i plate.) 



No. 65. Hubbs, Carl L. — Nomenclatural Notes on the Cottoid Fishes of 

 Michigan. (9 pages.) 



No. 66. Ruthven, Alexander G. — Contributions to the Herpetology of Iowa, 

 III. (3 pages.) 



No. 67. LaRue, George R. — A New Species of Tapeworm of the Genus 

 Proteocephalus from the Perch and the Rock Bass. (9 pages, i plate.) 



No. 68. Williamson, E. B. — Results of the University of Michigan- 

 Williamson Expedition to Colombia, 1916-1917. IV. Notes on Species 

 of the Genus Heteragrion Selys with Descriptions of New Species (Odonata). 

 (65 pages, 12 plates.) 



No. 69, Ruthven, Alexander G. — The Amphibians of the University of 

 Michigan-Walker Expedition to British Guiana. (14 pages, 2 plates.) 



No. 70. Blanchard, Frank N. — Two New Snakes of the Genus Lampropeltis. 

 (11 pages, 2 tables, i plate.) 



No. 71. Parshley, H. M. — On Some Hemiptera from Western Canada. (35 

 pages.) 



No. 72. VanCleave, H. J. — Acanthocephala from Fishes of Douglas Lake, 

 Michigan. (12 pages.) 



No. 73. Walker, Br>'ant. — New Species of Amnicola from Guatemala. 

 (4 pages, I plate.) 



No. 74. Walker, Bryant. — Notes on North American Naiades. II. (8 pages, 

 2 plates.) 



No. 75. Hussey, Roland F. — The Waterbugs (Hemiptera) of the Douglas 

 Lake Region, Michigan. {2^ pages.) 



No. 76. Barbour, Thomas. — An Undescribed Microhyla. (4 pages.) 



