8l8 CONNECTICUT EXPERIMENT STATION REPORT, I9O7-I908. 



under surface of the leaves, eating off the green tissue between 

 the veins and leaving the veins and the upper epidermis, as is 

 shown on Plate LIV a and c. 



In about three weeks the larvse or grubs are fully grown, and 

 crawl down the trunks of the trees or drop from the ends of 

 the branches to the ground and transform to the rtaked pupa 

 stage. The great proportion of the pupae are found close around 

 the base of the tree or lodged in the crevices of the rough bark 

 of the trunk and larger branches. Except for being in crevices, 

 they are unprotected. The writer has seen trees in New Haven 

 where it would be possible to gather several quarts of these pupae 

 at the base of a single tree. 



The pupa stage lasts about ten days, then the adult beetles 

 appear, and lay eggs for the second generation, which seldom does 

 much harm in Connecticut. Those emerging late probably do not 

 lay eggs for a second brood, but may be seen crawling and flying 

 about for a time, feeding more or less, but early going into 

 winter quarters, usually in church belfries, attics of houses, barns, 

 sheds or other out-buildings; They also pass the winter in cracks 

 of fences, telephone poles, or under the edges of the loose bark 

 of the trees. In some of the cities worst infested the adults 

 sometimes gather in church belfries in such numbers that they 

 can be swept up by the half bushel. The elm leaf beetle often 

 occurs with the two-spotted lady-beetle in dwellings, simply 

 because they both seek the same kind of a place for hibernation. 

 Correspondents frequently send both species to the writer and 

 desire to know if they are not in some way responsible for the 

 injuries to their carpets. There is, of course, no relationship 

 or similarity in food habits of the three species. The lady-beetle 

 is predatory, and in the larval stage destroys numbers of plant 

 lice, and therefore should never be destroyed. The elm leaf 

 beetles should, of course, be killed wherever they are found. 



DESCRIPTION. 



The eggs are bright yellow in color, bottle-shaped, and resemble 

 the eggs of the Colorado potato beetle, but are smaller. They 

 are fastened vertically to the under side of the leaf in clusters 

 of from five to twenty-five arranged in two or three irregular 

 rows. 



