October, '19] CROSBY and LEONARD: HONEYSUCKLE MINER 391 



A second lot planted July 26 fared the same. In a third lot, planted 

 August 26, the injury soon became apparent. In making these cut- 

 tings the greenhouse foreman had been careful not to select cuttings 

 on which mines were apparent but as many eggs were present on the 

 leaves the injury soon appeared. Owing to the great difficulty of 

 growing plants from green cuttings due to the depredations of this 

 insect, this method of propagation has been abandoned at this nursery 

 and hard-wood cuttings have been used instead. 



We visited the nursery on August 26 and found moths, eggs, pupae 

 and all stages of the larvae present on the plants out of doors. The 

 eggs were deposited singly on the underside of the leaves. The egg 

 (Fig. 20, 1) is oval in outline, flattened on the side of attachment, con- 

 vex above and pale yellowish in color. The surface is beautifully 

 sculptured with more or less regular hexagonal pits. The measure- 

 ments of three eggs are as follows: .24 by .18; .26 by .16; and .28 by 

 .2 mm. 



The beginning of the mine is indicated by the empty egg shell. The 

 young larva at first forms a linear mine on the underside of the leaf 

 which gradually widens and extends along a vein. After running for 

 about 5 mm. this abruptly enlarges into a blotch which obliterates 

 the hnear mine. The blotch mine (Fig. 20, 2) is on the underside of 

 the leaf, is about 10 mm. in diameter and is usually outlined by the 

 larger veins. There is only one larva in a mine but there are often 

 several mines in a leaf. 



The recently hatched larva (Fig. 20, 3) measures .44 mm. in length 

 with the prothorax very wide. It is pale translucent or pale greenish 

 from the ingested food with the head slightly brownish. In the next 

 to the last stage the larva is about 2.5 mm. in length, pale yellowish 

 in color, distinctly flattened and the prothorax is twice as wide as the 

 head. The sides of the prothorax project so as to almost form tulier- 

 cles. The body gradually tapers posteriorly and becomes nearly 

 cylindrical. The head which is .25 mm. wide is slightly less rounded 

 than in the next stage and is held in ;i nearly horizontal position. 

 The legs are somewhat paler than in the full-grown larva. 



The full-grown larva (Fig. 20, 4) is about 5 mm. in length, yellowish 

 and nearly cylindrical with the last four or five segments tapering. 

 The head is dark brown, almost black, with the cervical shield some- 

 what lighter. The thoracic legs are well developed and brown in 

 color. Only three pairs of prolegs are present l)esides the usual anal 

 pair, and are situated on the third, fourth and fifth abdominal seg- 

 ments. There is a small black bar between the protlioracic legs. 



In the next to the last stage the larva lines the mine with silk and 

 folds the leaf downward, puckering the under surface of the mine into 



