COIsTTElsTTS. 



On the Insects, Coleopterous, Hymenopterous and Dipterous, 

 inhabiting the Galls of certain species of Willow, Part 2d 

 and last, by Benj. D. Walsh, (Commencement in No. 2.) 253 



Notes ou the Zygsenldse of Cuba, Part 1, by Aug. R. Grote, . 287 



Notes on the Habits of a few Califoroian Cokoptcra, by Geo. 



H. Horn, M. D., 289 



On Uscchus lacerta, Motsch., by Geo. H. Horn, M. D., . . 293 



On Rhagodera tuberculoid, Mann., by Geo. H. Horu, M. D., 294 



Some observations on Phodaga altieeps, Le Conte, by Geo. H. 



Horn, M. D., 29G 



Descriptions of new species of North American Formicldse, by 



S. B. Buckley, (Commencement in No. 1.) . 335 



Descriptions of two new species of Trigonafys, by E. T. Cresson, 351 

 Revision of the Fossorial Hymen optcra of North America. — 

 I. Crabronidae and Nyssonidas, by A. S. Packard, Jr., 

 M. D., ... . .353 



Description of two new species of North American Brachyce- 



rous Dlpttra, by Aug. R. Grote, ..... 445 

 Index, 44f> 



