164 Maine Agricultural Experiment Station. 1918. 



Cornus leaves are just separating from the blossom buds and 

 are about half an inch long. In 191 7 this was on June 2, and 

 this is the earliest date on which the writer has taken a specimen; 

 however in a normal year they probably appear about two weeks 

 earlier. Only one beetle was taken at this time, and there was 

 but slight indication of the work. On June 7 (1917) the leaves 

 were quite well expanded and separated from the blossom buds, 

 the beetles were abundant. In 1917 the dogwood did not blos- 

 som until June 18, which is at least 10 days later than is usual 

 in Orono. 



The first eggs in 1917 were deposited on June 5, but in 1918 

 larvae about 3 days old were collected in Orono, so eggs must 

 have been laid at least as early as May 22. Eggs are not ordi- 

 narily found until the middle of June, but may be found from 

 then on until the middle of July. In the laboratory, the last 

 eggs were deposited on July 24, (1917). The majority of the! 

 eggs are deposited in early July. 



The first larva to hatch in the laboratory appeared on June 

 14 (1917), but larvae were found in the field on June 12 (1917) I 

 and on June 3 (1918). Larvae may be found in the field from 

 early June through mid-July, and scatteringly a few even in 

 early August. 



The adults are very "scarce in the field by the 12th of July, 

 and practically all of the hibernating adults are dead by the 

 20th. In the laboratory all have died on or before August 1, 

 except for one female which lived until October 2. The writer f 

 doubts if they ever live as long as that under natural conditions. 

 The first adult of the new generation was bred on July 15 

 (1917). The adults of the new generation do not feed at all, 

 but enter into hibernation as soon as they have emerged. 



There is only one generation each year, and no indication 

 of a second under any conditions. 



Distribution. 



During the past spring (1918) the writer has had a limited 

 oportunity to observe something of the seasonal history of this 

 species in Connecticut. They were found locally common on 

 the dogwood in Middletown and later in Norfolk. They had 

 already begun to pair on May 17 when they were first observed' 



