11 TABLE OF CONTENTS. 



TowNSENO, C. H. Tyler. On the Diptera of Baja California, Includ- 

 ing Some Species from Adjacent Regions 593 



Uhler, p. R. Observations upon the Heteropterons Hemiptera of 



Lower California, with Descriptions of New Species. .... 223 

 Van Denborgh, John. Descriptions of Three New Lizards from 

 California and Lower California, with a note on Phryno- 



soma Blainvillii 296 



Notes on Crotalus Mitchellii and " Crotalns Pyrrhus " 450 



Phrynosoma Solaris, with a Note on its Distribution 456 



VoDGES, A. W. Notes on Palaeozoic Crustacea No. 4. — On a New 



Trilobite from Arkansas Lower Coal Measures 589 



Proceedings 621 



Index 643 



List of Plates. 



I-III. Perophora annectens. 



IV. Lewisia Kelloggii. 



V-VI. Lower Californian MoUusca. 



VII- VIII. Coleoptera of Baja California. 



IX. Trachypterus rex-salmonoruni. 



X. HippoceiDhalus japoniciis. 



XI. Neotonia californica. 



XII. Neotoma albigula. 



XIII. Neotoma mexicana 



XIV. Pliocene fresh water fossils. 



XV-XVII. Odonata of Baja California. 



XVIII-XIX. Aquilegia ecalcarata; Aquilegia micrantha. 



XX-XXI. West American Crustacea. 



