CONTENTS, 



On the Period and Ratio of the Annual Increase in the Circum- 

 ference of Trees. By Thomas Meehan 292 



Third Contribution to the History of the Balaanida) and Delphi- 



nidse. By Edward D. Cope 293 



On the Reptilia and Batrachia of the Sonoran Province of the 



Nearctic Rsgion. By Ed w. D. Cope 300 



Fifth Contribution to the Herpetology of Tropical America. By 



E. D. Cope 317 



On the Agricultural Ant, (Myrmica Molefaciens.) By Gideon 



Lincecum 323 



Descriptions of some new species of Diurnal Lepidoptera. By 



Try on Reakirt 331 



