﻿FIELD AND FOREST. I 95 



used with ether or chloroform the chamber is to be filled with cotton 

 or sponge and then saturated, and the cork put in tightly. If cyanide 

 of potassium is used, the chamber is filled with sawdust, mixed with 

 the cyanide broken up small, but this should never be used in taking 

 Hymenoptera, as it changes yellow to crimson or red. 



Frankford, Phila. J. S. Johnson. 



Mrs. Maxwell's Colorado Museum. 



Catalogue of the Birds. 



The following is a systematic catalogue of the birds contained in 

 the " Colorado Museum," prepared by Mrs. M. A. Maxwell, of 

 Boulder, Colorado, and by her exhibited at the Centennial Exposition 

 held in Philadelphia during the past summer. The collection con- 

 sists of excellently mounted specimens, many of which were procured 

 by the lady herself, while all were put up by her hands. It illustrates 

 very fully the avian fauna of Colorado, while it bears testimony, not 

 only to the great richness and variety which characterize the produc- 

 tions of the new State, but also to the success which has crowned the 

 enthusiastic and intelligent efforts of a "woman Naturalist." 



The collection embraces many species whose occurrence in Color- 

 ado was wholly unlooked for ; such as Nyctherodias violaceus, Gar- 

 zetta candididssima, and Tantalus locula tor among southern species, and 

 Stercorarius parasiticus, Xema sabinei, and CEdemia americana from 

 the high north; the latter, it will be observed, is a strictly littoral 

 species, hence, its occurence in Colorado, the very centre of the con- 

 tinent is all the more remarkable. 



Family TURDID^E : Thrushes. 



1. Turdus migratorius, j3. propinquus, Ridgw. — Western Robin, a, ^ ad.; b, ^ 

 ad. 



2. Turdus guttatus, -y.- auduboni, Baird. Rocky Mountain Hermit Thursh. a, $ 

 ad. ; b, 9 ad. 



3. Turdus ustulatus, /3. swainsoni. Olive-backed, or Swainson's Thrush. a, $ 

 ad. 



4. Turdus fuscescens, Stephens. Tawny Thrush ; Wilson's Thrush, a, <^ ad. 



5. Galeoscoptes carolinensis, (Linn.) Cat Bird, a, ^ ad.; b, 9 a d. 



6. Oreoscoptes montanus, (Towns.) Sage-Thrasher; Mountain Mocking Bird, a, 

 (^ ad. ; b, Juv. 



