THE EIJVULEAF BEETLE. 



held them in check at home, did not come with them. 

 G. luteola came in at Baltimore about 1834. The adult 

 hibernates beneath bark, in cracks in buildings, and in 

 other shelter. It may go into hibernation quite yellow 

 and come out very dark green. The orange-yellow eggs 

 are laid in clusters on the lower side of a leaf and the 

 larvae feed on the lower side also, gradually skeletonizing 

 the leaf. When two or three weeks old, they enter the 

 ground and pupate, emerging as adults in about a week. 

 Usually it is the adults of the second annual brood which 

 hibernate. Hints as to some of the other species may be 

 gained from their food-plants. The following have stripes 

 (often narrow and indistinct, especially in americana} 

 on their elytra: americana is found on golden-rod; notulata, 

 on rag- weed (Ambrosia); and notata, on Eupatorium. 

 The following have no elongate, dark markings on the 

 elytra: cavicollis is found on peach, plum, and cherry; 

 rufosanguinea, on Azalea; nymphccce, on water-lilies; 

 tuber culata and decora, on willow. 



Among others, Trirhabda may be distinguished from 

 Galerucella by having the third antennal joint shorter 

 than the fourth ; and the antennae of Monoxia do not reach 

 the middle of the body, ta.rsal claws bifid only in males. 



Two species are familiar to gardeners. 

 D. 12-punctata (Plate LXXXIII) is called 

 the Southern Corn Root- worm because its larvas live in the 

 roots of corn (and other grasses) and are sometimes quite 

 injurious in the South. It is called the Twelve-spotted 

 Cucumber Beetle because the adults eat cucumber leaves, 

 but they feed also on melons of various kinds. The 

 hibernating adults are among the first insects to appear 

 in the spring and the last to take shelter in the fall. The 

 Striped Cucumber Beetle, which feeds also on all the 

 melon family, is D. vittata (Plate LXXXIII). The larvae 

 live in the roots and in the base of the vine of cucumbers, 

 melons, etc. Adults hibernate in the ground. D. atri- 

 pennis (elytra black) and D. longicornis (elytra green or 

 yellow, without black margins) have the outer edge of their 

 tibiae ridged. The latter species is called the Western 

 Corn Root- worm. 



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