94 N. S. ENTOMOLOGICAL SOCIETY. 



to 30, coincides with the hatching of the Tussock Moths, and the ad- 

 dition of Lead Arsenate to this spray with thorough work in applying it 

 should protect any orchard from outbreaks. The earlier sprays are of 

 practically no value in Tussock Moth control. Gathering and burning 

 the egg masses in winter when pruning is of some value but control can- 

 not be assured from such methods. 



PARSNIP WEB WORM (DEPRESSARIA HERACLIANA). 



By C. B. Gooderham, Truro, N. S. 



IN the summer of 1913 while collecting along the Salmon River 

 bank, it was noticed that the seed heads of the wild parsnip were 

 turning brown and covered with a web. Upon closer examination 

 it was found that a large number of caterpillars were feeding on the seeds, 

 and, as they attacked new parts, they tied them all up with silk, making 

 for themselves a complete covering. Some of these caterpillars were 

 collected and later on some of the pupae were taken and adults reared 

 from them. 



The following spring the plants were carefully watched, and eggs 

 were found the latter part of May. These eggs hatched and the resultant 

 larvae were reared to maturity. The same summer a large number of 

 parsnips that were being grown for seed purposes were attacked by this 

 pest, and much damage was done to the crop, making it almost 

 impossible to raise seed. 



This spring the eggs were first found on the 18th of May. They were 

 then very thick on both the leaves and stems of the plants, chiefly around 

 the sheath surrounding the developing seed heads. The eggs were watch- 

 ed closely and in a few days the young larvae escaped from the egg and- 

 immediately bored through the covering to the flowers. The eggs are 

 very small, measuring from 32-40 microns in length and 17-19 microns 

 wide. They are shining white and are ribbed longitudinally. They are 

 glued to stem or leaves of the plant and deposited singly. 



The larva in its first instar measures 1.5-2 mm. long, is a light greenish 

 color covered with small black tubercles, most of these tubercles bearing 

 a stiff bristle. The head and prothoracic shield are black. It moults five 

 times before it enters the pupal state and when mature measures about 

 3-4 of an inch long. 



The adult is a small greyish moth with a wing expanse of 2 1-2 cm. 

 The wings are fringed with long hairs, the front ones narrower and 

 darker than the hind wings. When folded they are held flat on the 

 back giving the insect a flattened appearance . They are very active and 



