INSECTS AFFECTING PARK AND WOODLAND TREES 563 



irregular edges, four on each segment in a straight, even line, not shining 

 like the subventral tubercles. Body light green; joints 2, 12 and 13 

 posteriorly orange. Venter orange tinted. Thoracic feet black, except at 

 the joints ; abdominal ones green. 



Larvae entered the earth without molting and formctl thin, elliptic 

 black cocoons of uniform close texture. Size 6 to 7 x 2.5 to 4 mm. 



The adult female of this species is nearly y^ inch long ; black, marked 

 with dusky and ferruginous. The male is slightly smaller, black and 

 marked with light yellowish, which is also the color of the venter. 



Bibliography 

 1894 Dyar, H. G. Can. Ent. 26:187 

 1896 Marlatt, C. L. U. S. Dep't Agric. Div. Ent. Tech. Ser. 3, p. 65 



Willow flea beetle 



Disonycha caroliniana Fabr. 



A striped, rather stout, black and yellow beetle about }^ inch long, occurs in June 

 on willow. 



This insect was taken by us in small numbers on willow and as a gen- 

 eral thing it can hardly be considered injurious. Dr Walsh records rearing 

 it from a cecidomyid gall, Rhabdophaga brassicoides, of the same 

 season's growth, and states that he captured another at large on that gall 

 about the same date. He also records, on the authority of Dr LeConte, 

 that Say found this species in considerable numbers on the common elder 

 (Sambucus) and some other plants, but he states that he failed to obtain 

 any specimens on elder at Rock Island, though it is a coinmon plant in that 

 section. Dr J. B. Smith records this species from a number of New Jersey 

 localities. Mr F. H. Chittenden obtained eggs of this species and suc- 

 ceeded in bringing the insect to maturity on purslane, though the larvae 

 rejected chenopodium and amarantus. The eggs were obtained July 30, 

 and the largest larvae had attained full growth by Aug. 9, and entered the 

 earth the following day. The remainder buried themselves in the sand 

 Aug. II, and all but one had transformed to pupae on the 17th. He found 

 the pupal stage to be of about nine days duration. He has described the 

 larva and pupa as follows : 



