6 PROCEEDINGS OF THE NATIONAL MUSEUM art. 1 1 



sometimes absent; cheeks with dense, long pile; arista with a few 

 scattering miniite setules mider high power (35 diameters). Femora 

 almost black, with long hair and no bristles; tibiae reddish to 

 blackish, all with long pile, the middle ones with several apical 

 spines on lower side, middle basitarsi also pilose, with several shorty 

 ciu'A^ed spines on front edge below ; hind tibiae with long pile, below 

 at tip with one longer and one shorter spine. The golden brush of 

 hairs for cleaning are conspicuous on inner side of hind tibia on 

 apical third, and on basitarsus. Abdomen shining black, with no 

 bristles, but a good deal of black hair, especially posteriorly. 



Female. — Pilose as in male, but the pile is shorter; front with 

 some distinct f rontals, but they seem variable ; cheek with dense but 

 rather short pile. 



Length, 2.Y to 5.5 mm. 



Described from nine males and eight females. The type and allo- 

 type are from St. Paul Island, Bering Sea, collected August 1, 1914, 

 by E. A. Preble, and August 16, 1915, by G. D. Hanna. Another 

 male and a female from the same island were collected b)'' Hanna in 

 1915 and 1916, a male and female by A. G. Whitney in 1914, and 

 another male by Preble in 1914; a male and a female from Bering 

 Island, of the Commander group in Bering Sea (palaearctic), by 

 Barrett-Hamilton and Dr. Leonhard Stejneger respectively, in 1897 ; 

 a female from Pribilof Islands by Stejneger some years earlier, not 

 dated ; two females from Nikolaki, Bering Island, in 1895 ; a female 

 frome Skagway, Alaska, June 14, 1921 (Aldrich) ; and a male and 

 female from Union Ba}^, Vancouver Island, April 26, 1916 (Hanna). 

 Also a male and female from Katmai, Alaska, 1917, lent by Prof. 

 James S. Hine and collected by him. 



ry^e.— Male, Cat. No. 41860, U.S.N.M. 



Named in honor of Dr. Leonhard Stejneger, of the United States 

 National Museum, whose interest in the life of the Bering Sea islands 

 has been continuous for nearly half a century. 



This is the nearest of all our species to the European pilipes Hali- 

 day, type of the genus, which also has all the legs with long pile and 

 not bristles. It however has the abdomen opaque, the dorsocentral 

 bristles quite appreciably developed, and the front with distinct 

 lateral bristles in the male and not so much pile. The thin expan- 

 sion of the front basitarsus below its apex is less noticeable in 

 stejnegerl than in nehularum, but in j>ilW'^^ i^ i^ hardly perceptible 

 at all. The female of stepiegeri can be distinguished from that of 

 pilipes by its more shining abdomen. In making these comparisons 

 I am using four European specimens of piUj^es received from Mr. 

 Collin and two from Prof. T. D. A. Cockerell. 



U. S. GOVERNMENT PRINTING OFFICE: 1929 



rVjr sale by tlie Supeiintendent of Documents, Washington, D. C. - - - - - Price 5 cents- 



