APRIL 19, 1921 abstracts: entomology 191 



Caraboidea, and descriptions of the American Barinae. Many new genera 

 and species are characterized. The species are treated systematically, being 

 placed in subgenera or unnamed species groups and tabulated. In the re- 

 \ision of Platyninac, all of the species belonging to the subfamily are described 

 in tabulated form, and in the part dealing with the Barinue all the species are 

 described whether they were known to the author or not. The types of all 

 of the new species are in the author's collection. Comments on the new 

 species, showing their affinities to described forms, are included and make the 

 paper more available to students. S. A. Rohwer. 



ENTOMOLOGY. — Holarciic tribes of the ichneumon- flies of the subfamily 

 Ichnenrnoninae {Pimplinae). R. A. Cushman and S. A. Rohwer. 

 Proc. U. S. Nat. Mus. 57: 379-39(). 1920. 



This paper contains a historical sketch of the various classifications and 

 treatments of the Ichneumon flies belonging to the subfamily Ichnenrnoninae 

 (formerly called Pimplinae), followed by a synopsis of the tribes. The key 

 is divided into two parts, the first based entirely on characters taken from the 

 females and illustrated by insert cuts. The primary characters used in this 

 key are secondarv sexual, and much value is placed on the shape of the ovi- 

 positor. It is believed that these characters show the natural relation of the 

 various groups. The second key includes characters common to both sexes. 

 After the synopsis, the various tribes are briefly defined and the North Ameri- 

 can genera included in them are listed. This subfamily has previously been 

 divided into five tribes, but in the present paper the authors propose eight 

 new ones, making the total number of tribes thirteen. S. A. R. 



ENTOMOLOGY. — The North American ichneumon-flies of the tribes Labenini, 

 Rhvssini, Xoridini, Odontomerini, and Phytodietini. S. A. Rohwer. 

 Proc. U. S. Nat. Mus. 57: 405-474. 1920. 



In this paper the North American parasitic Ichneumon flies belonging to 

 the groups listed in the title are described and tabulated, and some of the 

 more typical members of each group illustrated. A few new species are de- 

 scribed, but the paper, as a whole, is a revision and endeavors to bring to- 

 gether the taxonomic and biologic information axailable on these groups of 

 parasites. S. A. R. 



ENTOMOLOGY. — The North American ichneumon (lies of the tribe Acoe- 

 nitini. R. A. Cushman and S. A. Rohwer. Proc. U. S. Nat. Mus. 

 57: 503-523. 1920. 



This paper deals with the parasites belonging to the tribe Acoenitini of the 

 subfamily Ichneumoninae {Pimplinae) and is one of a series of papers by the 

 authors, who have undertaken to revise the North American parasites of this 

 subfamily. All of the genera known to occur in the Holarctic region are 

 tabulated and the species that occur in North America treated in detail. 

 Only two of the genera of this tribe occur in the Nearctic region. One, 

 Coleocentrus Gravenhorst, is treated by the senior author, and the other, 

 Arotes Gravenhorst, by the junior author. Full page illustrations for two 

 well known species are included. S. A. R, 



