17 



yellowish-white; the head and legs brownish, immature larvs slightly 

 lighter in Color ; segments of the body tuberculate on the sides^ 



The pupae are at first whitish, later becoming a rich honey color. 

 They are more convex and shorter than the larvae, but resemble them 

 otherwise. The tubercles still persist, and each is furnished with two 

 or three bristles, which, together with several spines and tuberCules on 

 other portions of the body, enable them to move about, in the mines 

 quite rapidly. i; 



In Ohio there are probably two generations, especially in the south- 

 ern portioii, while in more northern regions there is probably but one. 

 At Columbus, June 24, 1905, a large number of egg masses were found, 

 a few of which had hatched, and on July 29 near Logari, Ohio, several 

 mines were opened and found to contain larvae in all stages, as well as 

 pupae. A considerable number of newly-laid egg masses were also noted. 



Fig. T. The Locust Hispa {Odontata dorsalis) ; a, larva (from Chittenden, Bui. 

 38, (n. s.) Div. Ent, U. S. Dept. Agri.) ; b, pupa; c, aduh ; d, egg mass 

 and beginning of mine (shaded portion) on black locust leaf. Greatly 

 enlarged. (Original.) 



At New Concord all stages of the insect were found on September 6, 

 1905, and one newly-laid egg mass was observed. 



The insect has quite a wide range of food plants, having been 

 observed feeding upon the leaves of white oak, beech, birch, hawthorn, 

 apple, crab-apple, the tender leaves of Ulmus americana and the red oak. 

 It also feeds upon herbaceous plants, as quite large number^ of them 

 were seen by Mr. Chittenden feeding upon clover plants growmg under 

 locust trees at Cherry Dale, Va. They are also known to feed upon the 

 hog peanut (Fo/cam comoja) and the soy bean. 



NATURAL ENEMIES. 



Dr Howard reports four parasites which he has been able to rear 

 from larvae and eggs of this insect, and one possible secondary parasite. 



