PROCEEDINGS 137 



Proc 

 No. 



2299. Report on a small collection of Indian parasitic Hymenoptera. By A, B. 



Gahan, Pp. 513-524. Oct. 20, 1919. 



2300. A mounted skeleton of Dimetrodon gigas in the United States National 



Museum, with notes on the skeletal anatomy. By Charles W. Gilmore. 

 Pp. 525-539, 8 figs., 4 pis. Dec. 15, 1919. 



2301. New genera and species of muscoid flies. By Charles H. T. Townscnd. 



Pp. 541-592. Dec. 15, 1919. 



2302. Recent Foraminifera from off New Zealand. By Joseph C. Cushraan. Pp. 



593-640, 2 pis. Dec. 16, 1919. 



2303. The red spiders of America and a few European species likely to be intro- 



duced. By E. A. McGregor, Pp. 641-679, 11 figs., 6 pis. Jan. 8, 1920. 



Volume 57 



Proceedings of the United States National Museum, vol. 57. Pp. i-x (title page, 

 advertisement, table of contents, and list of illustrations) ; pp. 1-678 (Pro- 

 ceedings papers 2304-2324) ; pp. 679-689 (index) ; 99 figs., 55 pis. 1921. 



2304. On some hitherto unrecognized reptilian characters in the skull of the In- 



sectivora and other mammals. By Jacob L. Wortman. Pp. 1-52, 16 figs. 

 Apr. 5, 1920. 



2305. On some forest Lepidoptera with descriptions of new species, larvae, and 



pupae. By Carl Keinrich. Pp. 53-96, 13 pis. June 17, 1920. 



2306. The Cumberland Falls, Whitley County, Kentucky, meteorite. By George 



P. Merrill. Pp. 97-105, 1 fig., 5 pis. June 15, 1920. 



2307. New species of Lepidoptera in the United States National Museum. By 



William Schaus. Ppp. 107-152. June 15, 1920. 



2308. Observation on living specimens of Iridic diaphana, a species of Foramini- 



fera. By Joseph Augustine Cushman. Pp. 153-158, 3 pis. June 16, 1920. 



2309. Three new species of Indian drynnid parasites of rice leaf-hoppers. By 



S. A. Rohwer. Pp. 159-161, 1 pi. June 16, 1920. 



2310. Report on cephalopods collected during 1906 by the United States Bureau 



of Fisheries steamer Albatross in the northwestern Pacific. By Madoka 

 Sasaki. Pp. 163-203, 4 pis. Sept. 3, 1920. 



2311. American records of whales of the genus Pseudorca. By Gerrit S. Miller, Jr. 



Pp. 205-207, 5 pis. June 15, 1920. 



2312. Descriptions of twenty-five new species of North American Hymenoptera. 



By S. A. Rohwer. Pp. 209-231. June 16, 1920. 



2313. Eocene insects from the Rocky Mountains. By T. D. A. Cockerell. Pp. 



233-260, 11 figs., 5 pis. June 15, 1920. 



2314. Annotated list of the Recent Brachiopoda in the collection of the United 



States National Museum, with descriptions of thirty-three new forms. 

 By William Healey Dall. Pp. 261-377. June 24, 1920. 



2315. Holarctic tribes of the ichneumon-flies of the subfamily Ichneumoninac 



(Pimplinae). By R. A. Cushman and S. A. Rohwer. Pp. 379-396, 14 figs. 

 June 18, 1920. 



2316. Diabantite, stilpnomelane, and chalcodite of the trap quarries of Wcstfield, 



Massachusetts. By Earl V. Shannon. Pp. 397-403. June 15, 1920. 



2317. The North American ichneumon-flies of the tribes Labenini, Rhyssini, 



Xoridini, Odontomerini, and Phytodietini. By S. A. Rohwer. Pp. 405-474, 

 13 figs. June 19, 1920. 



2318. Petrography of some lamprophyric dike rocks of the Coeur d'Alene mining 



district, Idaho. By Earl V. Shannon. Pp. 475-495, 4 figs., 3 pis. Sept. 

 2, 1920. 



2319. A new Chinese isopod, Ichthyoxenus geei. By Pearl L. Boone. Pp. 497-502, 2 



pis. July 27, 1920. 



2320. The North American ichneumon-flies of the tribe Acoenitini. By R. A. 



Cushman and S. A. Rohwer. Pp. 503-523, 3 figs. June 21, 1920. 



2321. A new fresh-water mollusk from Indiana. By Bryant Walker. P. 525, 1 fig. 



Sept. 9, 1920. 



