216 
THE STUDY OF INSECTS. 
The larvae are nearly naked, and grub-like in appearance, 
although furnished with sixteen legs. They feed upon 
wood, and are found at the roots or within the stems of plants. 
They transform either in their burrows, or, in the case of 
those that feed outside of roots, within loose cocoons. The 
pupae have transverse rows of teeth on the abdominal seg¬ 
ments ; these aid them in emerging from their burrows. 
The best known American species bores in the stems of the 
speckled or hoary alder (AInns incana ). 
Family MICROPTERYGID.E (Mi-crop-te-ryg'i-dae). 
The Little-zvinged Jugates (Ju'gates). 
These are very minute moths, which resemble Tineids in 
size and appearance. The largest species known to the 
writer expands but little more than half an inch. Figure 245 
represents the venation of the wings. Only a single genus. 
Microptcryx (Mi-crop'te-ryx), occurs in this country. The 
larvae are leaf-miners. 
Suborder Frenatve (Fre-na'te). 
The Frenate (Fre'nate) Lepidoptera. 
To the Frenatae belong nearly all of our moths, and all 
skippers and butterflies. With most moths of this suborder 
