THE CANADIAN ENTOMOLOGIST. 143 



Where permitted to continue their depredations undisturbed, they weaken 

 and injure, and occasionally destroy the trees attacked. They affect 

 chiefly the under side of the branches and twigs. 



REMEDIES. 



The branches of the infested trees may be vigorously rubbed with a 

 stiff brush or broom, which will dislodge many of the insects, and then 

 coated with a strong alkaline wash made by melting either soft or hard 

 soap and diluting it to the consistence of paint with a strong solution of 

 washing soda ; or they may be destroyed with an emulsion of coal oil 

 made by agitating vigorously and for a considerable time one pint of coal 

 oil with an equal quantity of milk, until the mixture assumes a creamy 

 appearance, when it should be diluted with about ten times its bulk of 

 water and applied with a brush or syringe. 



DESCRIPTION OF THE LARVA OF HEMARIS TENUIS, Gr. 



BY PH. FISCHER, BUFFALO, N. Y. 



Head light green, around which is a ring of bright fine yellow granu- 

 lations. Body light green whitish at the dorsal region; a whitish subdorsal 

 line on each side running from caudal horn to third segment, also a dorsal 

 green line running from caudal horn to 3rd segment, where they both become 

 indistinct. Under side and legs chocolate brown, prolegs black, with a 

 narrow white band near base. Caudal horn thin, slightly curved forward, 

 flanked at base with bright yellow. Stigmata on first, and from third to 

 tenth segments, dark blue. Length about two inches. Larva finely granu- 

 lated with white. It is found from middle of June to end of July. Of 

 these, some of the earliest larvae will, after pupating, hatch within about 

 two weeks, (the balance staying over till next spring) which will deposit 

 their eggs and also grow to maturity towards the latter part of September ; 

 so that the larvae may be found almost continually from June to October, 

 The eggs are small, round and green, and hatch in about ten days ; 

 they are found on the under side of the leaves of Symphoricarpus, 

 Lonicera (different species), and Triosteum perfoliatutn, its food plants. 

 The color of the larvae of this latter brood varies considerably, some 

 being a reddish brown with a slight purple tint, the head sometimes being 

 yellow like the ring around it, sometimes brown \ others when young are 

 green above and black below, with a black head ; others again have the 

 normal color and other characteristics. 



