128 



A MANUAL OF DANGEROUS INSECTS. 



layers of bark on old wood, and also on leaves, in clusters of 4 to 30. Eggs yellowish 

 white, elongate cylindrical. Larva white, with yellowish-brown head, short legs. 

 Pupa white, formed in earthen cell. Ths larva feeds on the roots several feet under 

 ground, doing much damage. The adults feed on the foliage and fruit. 



Distribution: Europe, Asia, North Africa, and introduced into California. 

 SoRAUER, P. Handbuch der Pflanzenkrankheiten, 3d ed., 1913, vol. 3, pp. 512, 513. 

 QuAYLE, H. J. California Agr. Exp., Sta. Bui. 195, 25 pp., 18 figs. 



Haltlca ampelophaga Leesb. 



(Vine Flea-beetle. Chrysomelidse; Coleoptera.) 



Hosts: Grape, willow. 



Injury: Serious. Defoliation. 



Description and biology: Adult, length 4 mm. ; brilliant green, sometimes deep blue- 

 green. Two generations, first appears in April (France), feeds on leaves. Pass winter 

 as adults at bases of vines, in bark, etc. Pupate in soil. Larva, length 6 mm., black; 





Fig. 65. — Vine flea-beetle {Haltica ampelophaga): Adult, larva, and injury, (v. Rendu.) 



feeds on leaves, flowers, and shoots. Larval period of first generation about a month . 

 Eggs clear yellow, oblong; placed on under surface of leaves in clusters of about 30. 

 (See text fig. 65.) 

 Distribution: France, Italy, Spain, Algiers. 



MoNTiLLOT, L. Les Insectes Nuisibles, 1891, p. 116. 



GuENAUX, G. Entomologie et Parasitologie Agricoles, 1904, p. 340. 



SoRAUER, p. Handbuch der Pflanzenkrankheiten, 8d ed., 1913, vol. 3, pp. 523, 524. 



Scelodnota strigicoUis Motschulsky. 



(Chrysomelidse; Coleoptera.) 

 Host: Grape. 

 Injury: Serious pest. 



Description and biology: Probably similar to grape root worm. 

 Distribution: India. 

 Maxwell-Lefroy, H. F. Indian Insect Life, 1909, p. 359. 



Brachyrlilnus (Otlorhynchus) spp. 



(Grape Root Weevils. Brachyrhinidse (Otiorhynchidse); Coleoptera.) 



The weevils of this genus breed at the roots of plants and are very destructive as 

 adults, often defoliating vineyards. 



