
Pe. 1860:) SENATE—No. 60. 27 
mon species observed during the breeding season, would be of great 
value. However few the facts, they will be very gratefully received. 
The recipient of this is accordingly respectfully solicited to con- 
tribute such facts on the subject as he may have at command, 
transmitting them as directed below. Full credit will be given to 
each observer in the Annual Reports of the Museum, and finally, 
in working up the observations thus collected, his name will be 
given as a guaranty of their authenticity. 
A series of specimens of the birds of any locality in the Southern 
and Western parts of the Continent, with or without their nests 
and eggs, with the date and place of collecting carefully noted and 
appended, would be thankfully received, and, if so desired by the 
collector, after careful examination, will be returned to him prop- 
erly labelled. 
Communications or packages should be addressed to J. A. ALLEN, 
care of Prof. Lours Agassiz, Museum of Comparative Zodlogy, 
Cambridge, Mass. 
L. AGaAssiz. 
Museum oF CoMPARATIVE eng 
CampBrincE, Mass., June 4, 1868. 
a Report on the Collection of Articulata, by Dr. H. HaGen. 
I arrived in Cambridge October 12th, 1867, having come to 
this country in order to take charge of the collection of Articu- 
lates in the Museum of Comparative Zodlogy, and especially to 
re-arrange the entomological collection. Prof. Agassiz desired 
me before beginning the work to draw up a detailed written 
plan, containing my views on the subject and explaining the 
method of arrangement which I thought best. 
This plan being generally adopted, I began with the class of 
Crustacea, postponing my work upon the Insects, because it was 
very important that the new boxes and cabinets intended to 
contain them, should be made by a first-rate workman, and they 
could not be ready for some months to come. The first lot 
arrived in August, 1868. 
The numerous objects received from Mr. Thayer’s expedition 
had for some time occupied all working hands; the importance 
of putting them in safety being generally recognized. On this 
account it had been impossible to give more attention to the 
collection of articulates than was absolutely necessary to keep 
