TABLE OF CONTENTS. V 



GiRAULT, A. A. Notes and descriptions of miscellaneous Page. 

 Chalcid-flies (Hymenoptera). No. 2213. August 10, 

 1917 ' 445-450 



New species: Tumidiscapus oophagas, Abbelln americana, Gonato- 

 cerus utahensis, Cirrospilus ocellatus, Eulophus cali/ornicus, Chryso- 

 pophagus kansensis, Sympusis substigmatu^, Thripoctenus ameri- 

 censis, Sympiesis ancylae, Trydymus aureipes, T. biguttatipennis, 

 T. aphidis. 



Hay, Oliver P. Description of a new species of extinct 

 horse, Equus lambei, from the Pleistocene of Yukon 

 territory. No. 2212. June 5, 1917 ».. 435-443 



New species: Equus lambei. 



. Description of a new species of mastodon, Gom- 



photherium elegans, from the Pleistocene of Kansas. 



No. 2198. June 1, 1917 1 219-221 



New species: Gomphotherium elegans. 



Hay, W. p. A new species of bear-animalcule from the 



coast of North Carolina. No. 2203. June 1, 1917 ^ 251-254 



New species: Batillipes caudatus. 



HoLLisTER, N. Some effects of environment and habit on 



captive lions. No. 2196. June 1, 1917 ^ 177-193 



Jackson, Robert Tracy. Fossil echini of the Panama 

 Canal Zone and Costa Rica. No. 2218. September 24, 

 1917 K... 489-501 



New species: Clypeaster gatuni, Encope annectans, E. platytata, 

 E. viegatrema, Schuaster cristatus, S. panaviensu. 



Marshall, William B. New and little-known species of 

 South American fresh-water mussels of the genus Diplo- 



don. No. 2209. August 15, 1917 * 381-388 



New species: Diplodonfelipponei, D.fortis. 



Myers, P. R. An American species of the liymenopterous 

 genus Wesmaelia of Foerster. No. 2206. May 24, 

 1917 ' 293-294 



New species: Wesmaelia americana. 



. A new American parasite of the Hessian fly 



(Mayetiola destructor Say). No. 2204. May 28, 1917 ^ 255-257 



New species: Polygnotus vernalis. 



I Date of publication. 



