1879. | Zoology. 393 
tive position of the various organs. It is more than probable 
that these differences result in a modification of function, and o 
so marked a nature that the external characters may be sensibly 
changed. ; 
Notwithstanding the work already done in the direction of 
synonomy, when a more complete knowledge of the anatomy of 
Unio is attained, and more is known of the modifications due to 
range and station, the number of species names will be sensibly 
diminished: This work will lie almost wholly in the line of their 
comparative anatomy and embryology. Not oneorgan, but all, must 
receive their due attention, then the external expression of these 
organs will be far more clearly comprehended.—P. Ellsworth Call. 
THe WESTWARD PROGRESS OF THE IMPORTED CABBAGE-WORM.— 
In 1869, in my second report, in treating of this insect, I remarked, 
“There is every reason to fear that it may some day get a foot- 
hold in our midst,” after showing that it was then confined to 
certain restricted parts of Canada and New England, and had not 
spread west of New York. It has been making further progress 
dissolved in about six gallons of water, or even strong tar-water 
may be used to advantage. The application should be made 
several times during the year, as it will be most effectual when 
the worms are 
PARTHENOGENESIS IN THE Honey-pee.—In the article in the 
April American NATURALIST, p. 261, copied from the Comptes 
Rendus, we have illustrated the danger of hasty generalization. 
The writer of the article suggests. that the “ Dzierzon Theory” 
rests on insufficient observation. This is far from the truth. The 
__ Closest observation not only by German but also by many Ameri- 
= Can apiarists, not only of one queen and her progeny, as was the 
