672 



AN INTRODUCTION TO ENTOMOLOGY 



moths issue in October or November; and then the wingless females 

 ascend the trees to oviposit as do the females of the canker-worms. 

 The female is represented in the lower left-hand part of the figure. 



Fig. 833. — Erannis tiliaria. (From The Author's Report for 1879.) 



She is grayish in color, with two black spots on the back of each 

 segment except the last, which has only one. The male has pale 

 yellow and brown or buff fore wings, with a central spot and a band 



beyond the middle, while the hind 

 wings are much lighter. This insect 

 ' can be combated by the same meth- 

 tods as are used against canker 

 worms. 



The notched-wing geometer, En- 

 nomos niagndruis. — This is one of the 

 larger of our geometrids. The larva 

 is a common looper upon maple, 

 chestnut, and birch trees, and meas- 

 ures about 58 mm. in length when 

 full-grown. It spins a rather dense, 

 spindle-shaped cocoon within a clus- 

 ter of leaves. The moth (Fig. 834) is ochre-yellow with reddish 

 tinge. The wings are shaded towards the outer margin with brown, 

 and are thickly spotted with small brown dots. 



Fig. 834. — Ennomos magnarins. 



