48 STORRS AGRICULTURAL EXPERIMENT STATION 
the winter. Some writers on the subject hold that they 
spend the winter in the pupa state, but, in this section at 
least, that is not the case. In the spring they transform to 
pupae, and, judging from the time the first mines were ob- 
served, the adults appear some time in May. 
With one exception the writers on the subject have record- 
ed but one brood in a season. It is tertain that a second 
brood occurs and it is possible that a third brood sometimes 
occurs. The immature caterpillars which Lintner* observed 
“toward the last of September” were possibly of the third 
brood. | 
OTHER APPLE LEAF MINERS. 
Several species of insects are occasionally fo md mining in 
apple leaves. Besides the Trumpet Miner, two other species 
were quite abundant during the past season. One of these 

“Bie. 12—A serpentine mine on the right and a trumpet mine on the 
left (slightly magnified). 
*rith Rept. Ins, N. “Y., 1805, p, 161; 
