38 



THE CANADIAN ENTOMOLOGIST. 



The Mature Larva. — Length lG-18 

 nun; diameter of second abdominal seg- 

 ment 3 mm.; width of head 1.75 mm. The 

 shape is nearly cylindrical, tapering slight- 

 ly towards both extremities. The general 

 colour is greenish \ellow al)o\e, light \ellow 

 on sides and beneath. The head, mouth 

 parts, cervical shield, thoracic legs and 

 spiracles are shiny black. 



The heafl is notched or emarginate on 

 its caudal border and the cervical shield 

 is divided by a median longitudinal line. 

 The body is beset with numerous shiny 

 black setigerous warts or tul)ercles, as 

 shown in the figure. 



The Yoiin^ Larva. — The larva in its 

 lirst instar is 1.5-2 mm. long and differs 

 very little from the mature larva except 

 in size and in being a darker greenish yel- 

 low anteriorly and a lighter yellow 

 posteriorly. 



The Pupa. — The pupa measures 1 mm. 

 long and .3 mm. wide The thoracic seg- 

 ments are dark brown and the abdominal 

 segments a lighter brown. 



The Adult. — The adult is a greyish 

 moth with a wing expanse of 23^ mm. 

 The wings are of a satiny lustre and 

 fringed with long hairs. The front wings are a dark grey with 

 darker longitudinal streaks, the hind wings a uniform light grey. 

 When at rest, the wings are held flat over the back, giving the 

 insect a flattened appearance. 



Life History and Habits. 

 The eggs were first observed this season on June 18th. They 

 are deposited singly and in large numbers on leaves, stems, and 

 particularly on the sheath surrounding the flower heads. The 

 time spent in the egg stage averages about seven days, and the 

 period of oviposition extends over a considerable period, as newly 



Fig. 1. Parsnip Wcbworin, 

 mature larva (X 11) 



