66 ANIMAL ACTIVITIES. 
for sucking, having a long proboscis formed of the two 
maxilla. The metamorphosis is complete. 
The Hymenoptera have four membranous wings 
with few cross-veins, the fore and hind wings being 
commonly hooked together for flight. The mouth- 
parts are fitted for both sucking and biting and the 
metamorphosis is complete. 
Names of Insects. Animals, like plants, are desig- 
nated in scientific works by two names, the first the 
name of the genus, and the second the name of the 
species. Thus, Danatis archippus means that the 
butterfly bearing that name belongs to the genus 
Danais and the species archippus. We also distin- 
guish men by using two names. Stuyvesant, Peter, 
as found in a directory, means that the man in question 
belongs to the family Stuyvesant, and that he is the 
particular member of that family known as Peter. 
Questions. How does the grasshopper differ from 
all the other insects studied ? 
How does the butterfly differ from the beetle? from 
the dragon-fly ? from the other insects studied ? 
How does the fly differ from the other insects ? 
How does the beetle differ from the other insects ? 
How does the squash-bug differ from the beetle ? 
from the grasshopper. 
How does the wasp differ from the fly? from the 
other insects studied ? 
How does the dragon-fly differ from the wasp ? from 
the butterfly ? 
In what respects do all the insects studied resemble 
one another ? 
Topics for Reports. House-flies. Insects in Brooks. 
Agricultural Ants. Insects in Ponds. Earwigs. The 
Cicada. Insects in Houses. Insects on Apple-trees. 
How to Prepare Insects for Cabinets. How to Kill 
Injurious Insects. Length of Life among Insects. 
Insect Friends. Sounds Made by Insects. 
