bigelow] EDUCATIOXAL BEE-HIVE 209 



that the bees see fit to build. By having a hole in the center of the 

 cover board, a super or any other apparatus may be placed above it. 

 But for this purpose the writer prefers the original straw hive, and 

 thus in one complete structure would be shown the interior of the 

 original bee tree, the first steps in hive making (the straw hive above 

 it) and at the left a complete modern hive with most improved ex- 

 perimental apparatus and accessories. 



The use of a hand-lens five inches in diameter makes any part of 

 the hive, or of any structure, or the movements of the bees more 

 readily and effectively seen and is strongly advised. 



I believe this hive to be worthy of the subject. It is a great and 

 unusual convenience. Its facilities are unlimited, and it will soon 

 become a joy to the purchaser, especially if he will use it for the 

 study of the Apis mellffica. 



My best wish to you, my reader, is that you may obtain as much 

 instruction and enjoyment in the use of this hive as I have found. 

 I own three complete with about forty-five sides of frames under con- 

 stant observation. 



If you can't get the whole, start with the one-frame travelling hive. 

 Watch the two sides, and be happy — and dream of getting more hives 

 and more happiness. 



DO BIRDS EAT BUTTERFLIES 



BY T. D. A. COCKERELL 



Lecturer in the University of Colorado 



One of the last papers written by Dr. A. S. Packard was on 

 the origin of the markings of organisms, with criticisms of the 

 commonly-held theories regarding mimicry in butterflies. 1 I do 

 not propose to discuss this essay in detail, but merely to point out 

 how well it exposes our ignorance of common things — things 

 which any intelligent child might observe. The whole of it (58 

 pages) is interesting and suggestive, and whatever one may be- 

 lieve as to the validity of Dr. Packard's deductions, it is well 

 worth reading. 



It is well known that certain butterflies exhibit a wonderful 

 " cryptic coloration " — that is to say, they resemble their sur- 

 roundings to such an extent that they can hardly be seen when at 



1 The Origin of the Markings of Organisms (Poecilogenesis) Due to the 

 Physical rather than the Biological Environment ; with criticisms of the 

 Bates-Muller Hypotheses. Proc. Amer. Philosophical Society. Vol. 43, 

 No. 178. Read Dec. 2, 1904. 



