80 
ede 
SAB. 
st. 
. 184. 
Barts 
. 786. 
BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 
The paleolithic period in the District of Columbia. By 
Thomas Wilson. 
pp. 371-376, 2 pls. 
Notes on a third collection of birds made in Kauai, Hawaiian 
Islands, by Valdemar Knudsen. By Leonhard Stejneger. 
pp. 377-386. 
Descriptions of new Ichneumonide in the collection of the 
U.S. National Museum. By William H. Ashmead. 
pp. 387-451. 
. Description of the yellow-finned trout of Twin Lakes, Colo- 
rado. By David 8. Jordan and Barton W. Evermann. 
pp. 453-454. 
. Contributions toward a monograph of the Noctuide of tem- 
perate North America. Revision of some teniocampid 
genera. By John B. Smith. 
pp. 455-496, 2 pls. 
. Catalogue of the described Aranez of temperate North 
America. By George Marx. 
pp. 497-594. 
. Notes on the serpentinous rocks of Essex County, New York; 
from Aqueduct shaft 26, New York City; and from near 
Easton, Pennsylvania. By George P. Merrill. 
pp. 595-600. 
A revision of the genus Araucariowylon of Kraus, with com- 
piled descriptions and partial synonymy of the species. By 
F. H. Knowlton. 
pp. 601-617. 
Notes on North American crayfishes—family Astacide. By 
Walter Faxon. 
pp. 619-634. 
Description of two new species of bats—Wyctinomus europs 
and VV. orthotis. By Harrison Allen. 
pp. 635-640. 
. Scientific results of explorations by the U.S. Fish Commis- 
sion steamer Albatross. No. VIII. Description of a new 
cottoid fish from British Columbia. By Tarleton H. Bean. 
pp. 641-642. 
. Description of a new lizard from Lower California. By Leon- 
hard Stejneger. 
pp. 643-644. 
. Scientific results of explorations by the U. S. Fish Commis- 
sion steamer Albatross. No. LX. Catalogue of fishes col- 
lected at Port Castries, St. Lucia, by the steamer Albatross, 
November, 1888. By David 8. Jordan. 
pp. 645-652, 
