THE POPLAR HAWK-MOTH. 



21 



on emergence, or had been afterwards injured in some way and 

 so were unable to fly. 



When full grown the caterpillar is green, roughened with 

 yellow points, oblique stripes on the sides yellow, spiracles 



reddish, horn of the 

 general colour, some- 

 times tipped with red- 

 dish. Head triangular 

 in shape, but not 

 pointed on the top. A 

 reddish spotted form 

 of the caterpillar is not 

 very uncommon. In 

 its very early life the 

 head is rather trian- 

 gular than rounded, 

 as is the head of the 

 young caterpillar of 

 the previous species, 

 and also that of the 

 Eyed Hawk. P>eds 

 on poplar, aspen, sal- 

 low, and willow, and 

 may be found from 

 July to September and 

 sometimes October. Chrysalis blackish, rougher than that of 

 the Lime Hawk. It lies in the ground so close to the surface 

 that it is often exposed when the garden borders under or 

 near poplars are raked over. The moth appears in May 

 and June as a rule, but in backward seasons it may not 

 emerge until July or even August. Caterpillars from eggs 

 laid in early May are likely to feed up and attain the perfect 

 state in late July, and eggs resulting from these will pass 

 through the caterpillar state to that of chrysalis by about 



Fig. 17. 

 Eg-g-s of Poplar Hawk-moth. 



