BS-150 ° 
DS-151. 
Bo-155 . 
BS-156 . 
BS-157 . 
construction and uSe of which are described. The plate illus- 
trates details of tre devices. 
Suggestions for bird field study. By May Thacher Cooke. 7 DD., 
Januery 1940. (Supersedes Leaflet 55-76.) 
Popularity of the study; availability of aids; time to 
equipment; Where end when to go; field identifications; not 
ing; significance of bird study; organizations; list of nelpful 
vooks and pictures; addresses of their publishers, and prices 
Raising chinchillas in captivity. Prepared in the Section of Fur 
Resources, Division of Wildlife Research. 3 pp., Feoruary 19 
Deseriztion of the chinchilla and its native habitat; no: 
importations into the United States; and hints on fe 
ing, pens,and dens; value of the fur. 
Ege 
Suggested action program for sportsmen'’s organizations. Prepared 
in Division of Wildlife Research. 5 pp., February 1940 
Opportunities for cooperation in educational programs, in in- 
proving environment for wildlife, in restocking operations, in 
emergency winter feeding, and in the activities of State and 
Federal control and lew onforcement programs. 
The Biolovical Survey mammal collection. Prepared in the Section 
of wildlife Surveys, Division of Wildlife Research. 4 pp., 1 pDl., 
February 1940, 
Brief history of the Biological Survcy; notes of interest on 
the mammal coilection which contains 1,513 tyse specimens; bricf 
accounts of some of the expeditions that contributed to the col- 
leetion and of inveStigations based upon it; housing and care of 
the collection. 
Flora of the Patuxent Research’ Refuge, Marylend. By Neil Hotchkiss. 
64 pO0., l map, May 1940. 
Description of the refuse; ecolosy of its vezetation; and 
vey 
xs 
annotated list of 706 species of flowWerir; plants and ferns col- 
lected there. 
Reising mealworms. By Franklin H. May. 2 op., March 1940. (Sup- 
ersedes Leaflet Bi-?) 
Use of mealworms for feeding captive birds; equipment and 
methods of rearing; list of dealers. 
Ornamental woody plants attractive to birds. By Myer Katz. 18 pp., 
March 1940, 
General considerations as to attracting.birds; references to 
available publications; ond alnhabetical list of the more impor- 
tant genera of woody vlants with notes on their ornamental value 
and their utilization by birds, 
Sullys Hill National Game Preserve, North Dakota. Prepared in the 
Division of Wildlife Refuges. 4 pt., 2 pls., April 1940. 
(Sunersedes Leaflet DS-61.) 
a 
