(iv) CONTENTS. 



P ; ,ge 



Nipher — On a New Form of Lecture Galvanometer 2S7 



Engelmann, G. — Notes on Agnvc 291, 370 



Riley — Notes on the Yucca Borer, Megathymus yucccc Walk. . .. 323, 566 

 Broadhead, G. C. — The Rocky Mountain Locust and the Season of 



1875 345 



Broadhead, G. C. — The Meteor of December 27, 1875 349 



Conant— Archaeology of Missouri 353 



Broadhead, G. C. — Age of Our Porphyries 366 



Engelmann, G.— About the Oaks of the United States.. .. 372, 3S5, 539 

 Seyffarth — Correction of the present Theory of the Moon's Motions, 



according to the Classic Eclipses 401 



Croswell — Mound Explorations in Southeastern Missouri 531 



Riley — On the Larval Characters and Habits of the Blister-beetles 

 belonging to the Genera Macrobasis Lee. and Epicauta Fabr. ; 



with Remarks on other Species of the Family Meloid.e 544 



Riley — On a remarkable new Genus in Meloid.-e infesting Mason- 

 bee Cells in the United States 563 



Riley — Further Remarks on Pro?ntba yuccasella, and on the Pollina- 

 tion of Yucca 56S 



Riley — On the Differences between Anisopteryx fometaria Hair, 

 and Anisopteryx cescularia W.-V., with Remarks on the Genus 



Paleacrita 573 



Riley — A new Gall on Acorn-cups 577 



Engelmann, G.— The Flowering of Agave SAa-zvii 579 



Engelmann, G. — The American Junipers of the section Sabina 583 



Engelmann, G. — A Synopsis of the American Firs (Abies Link) . . . 593 



Journal of Proceedings i-cclxxv 



Publications received in exchange. 

 " donated. 



General Index eclxxvii 



Errata — Corrections and Additions eclxxxv 



