NOTES. 191 
cel, excepting such as relates exclusively to the contents of the 
package. 
ll packages must be delivered in Washington free of freight 
and other expenses. 
Unless all these conditions are complied with the parcels will 
not be forwarded from the Institution ; and, on the failure to com- 
ply with the first and second conditions, will be returned to the 
sender for correction. 
Specimens of natural history will not be received for transmis- 
sion, unless with a previous understanding as to their character 
and bulk. 
Our contemporary, the ‘‘ Revue Scientifique” (Jan. 13, 1872, p. 
679) in analyzing a paper by one of the editors of this journal, 
has made several mistakes, one of which we might notice. It says 
“Mr. Packard rejects in consequence the idea of Fritz Müller and 
Brauer that the primitive insects had all leptiform larvze, and were 
hot afterwards modified to produce insects with eruciform larve.” 
On the contrary he agrees with the opinion of Müller and Brauer 
that the earliest insects were those with an incomplete metamor- 
phosis, quoting with approval Miller’s note to that effect. 
In a previous number (Sept. 23, 1871, p. 300) Dr. Packard is 
made to say “ that the king crabs are nearer the Trilobites than 
Plerygotus.” He has never said this, but on the contrary follows 
Mr. Woodward in uniting the king crabs with the Eurypterida, of 
Which Pterygotus is a member; considering the king crabs as on 
_ the whole much more remotely allied to the Trilobites than to the 
 Enurypterida. . 
Extomonoatsts will be pleased to learn that Mr. R. H. Stretch 
of San Francisco is now ready to begin the publication of “ Mus- 
trations of North American Zygeenide and Bombycide ” in which 
| he hopes to be able to figure all the North American species. The 
first plate, containing eight species of Alypia, six of Ctenucha, 
one Scepsis and a Psychomorpha are in the hands of Miss Peart 
(°F Philadelphia to be lithographed. Mr. Stretch proposes to fig- 
m the species as he can procure them, and so to arrange the let- 
2 ter press that it can be bound in proper order. The book will be 
 Maiform in size with the transactions of the American Entomo- 
MR Society. The value of such a work will largely depend on 
aid rendered to Mr. Stretch by museums and individuals, and — 
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