MEMBRANE-WINGED INSECTS. 269 
which you see in the centre of Fig. 209. Fishes are very 
fond of the larve of the Caddice, and hence the necessity 
of such a covering as they make for themselves. For this 
reason, also, they are often used as a bait by the angler. 
Questions. —In what are the Neuroptera like the Coleoptera and 
the Orthoptera? What is said of their wings? How are they divided 
into two groups? What are the families of the first group? What 
is there peculiar in three of these families? What is said of the Drag- 
on-flies? What of their eggs? What of their larve? What of 
their metamorphosis? What is said of the Day-flies? Give the nar- 
ration of Jaeger in regard to them. What is said of the ravages of 
the Termites? What of their habitations? What are the different 
classes in their communities? What is said of the laborers? Of the 
soldiers? Of the queen and her cell? What is said of the Book- 
lice? What is the characteristic of the second group of the Neurop- 
tera? What is said of the Ant-lion? What is said of a family of 
insects that deposit their eggs on stalks? Give the account of the lar- 
ve of the Caddice-flies. Describe their pupa state and thei: meta- 
« morphosis. 
— 
‘CHAPTER XXVII. 
MEMBRANE-WINGED INSECTS. 
460. Tue wings of the insects of the order Hymenop- 
tera are membranous, like those of the Neuroptera, but 
differ from them in not having a fine net-work of veins 
or nerves.* In some of the’very small species there are 
almost no nerves. The name membrane-winged is there- 
fore more appropriate than vein-winged, which is some- 
times given to them. The anterior wings of the Hyme- 
noptera are usually much larger than the posterior, and 
during flight the wings of each side are fastened togeth- 
er by minute hooks on the posterior wing, which take 
hold of the rear margin of the anterior one. The females 
* These two terms, meaning the same thing, must not be confound- 
ed with the same terms used in their ordinary sense. In insects they 
are applied to the frame-work of the wings. 
