178 Maine Agricultural Experiment Station. 1918. 



The Egg. 



Coloration. The eggs do not as a rule show any change ini 

 color before hatching, except that the 4 black thoracic spots 

 show through the shell about 24 hours previous to the emer-;l 

 eence of the larva. 



Where deposited. The eggs are deposited on the lower ! 

 surface of the leaves of the food plant. They are always: 

 streaked with excrement. 



How many deposited. As is customary among chrysome- [j 

 lids, the eggs are deposited in clusters. Usually there are about j 

 7 deposited in each cluster, and the largest number that the 

 writer has found in any one group is 12. 



The Larva. 



Hatching. The process of hatching is exactly the same r 

 as that already described for A. corui on page 166. 



Coloration after hatching. When the larva hatches from 

 the egg it is entirely honey yellow, except for the 4 black thoracic i 

 spots characteristic of the just hatched flea-beetles, as the dorsal j 

 portion of the lateral tubercles (fused v, vii, and viii) of the 

 mesothorax and the metathorax is the only pigmented portion h 

 of the cuticula when the larva ruptures the egg shell. Thell 

 larva colors up gradually, requiring about 2 hours to reach the 

 normal coloration. 



Color description of a first instar larva, early. Head and legs shin- |: 

 ing black, prothoracic and anal • shields brown ; body dark olive yellow, j 

 tubercles dark black brown, general aspect almost black; anal proleg; 

 honey yellow. 



Color description of a first instar larva, late. Head, prothoracic ! 

 shield and legs shining black, anal shield brown ; body honey yellow, 

 slightly greenish, both above and below ; tubercles dull brown ; anal 

 proleg honey yellow. 



The molt to the second instar (first molt). The process of molt- 

 ing is the same in all of the flea-beetles studied, and is described in 

 detail under the second molt of the elm flea-beetle (page 188). 



Coloration after the first molt. The coloration after the first molt 

 is exactly the same as that described below under the heading "colora- 

 tion after the second molt." 



Color description of the second instar larva, early. Head, legs, pro- 

 thoracic shield and tubercles shining black; anal shield incompletely 



