PROCEEDINGS, 1916. 51 



6. Lugger, O., Bugs Injurious to Cultivated Plants. Bui. 69 Minn. Agr. Exp. Sta. 



1900 131-132. 



7. Wilson, H. F. & Childs, LeRoy., The Rose Leaf-hopper as a Fruit Pest. 2nd Bien. 



1915 Crop Pest & Hort. Rept. Ore. Agr. Expt. Sta. :189-194 



8. Osborne, H. The Rose Leaf-hopper. Me. Agr. Expt. Sta. Bui. 238:158. 



1915 



9. Brittain, W. H. The Rose Leaf-hopper. Proc. N. S. Ent. Soc. for 1915: 37-38 



1915 



EXPLANATION OF PLATE. 



Fig. 1 Empoa rosae, egg (x 50). 



Fig. 2. Empoa rosae, first stage nymph (x 30). 



Fig. 3. Empoa rosae, second stage nymph (x 30). 



Fig. 4. Empoa- rosae, third stage nymph (x 30). 



Fig. 5. Empoa rosae, fourth stage nymph (x 25). 



Fig. 6. Empoa rosae, fifth stage nymph (x 20). 



Fig. 7. Empoa rosae, adult (x 20). 



NOTES ON THE ROSY APHIS (Aphis malifoliae Fitch) 

 IN NOVA SCOTIA. 



By W. H. Brittain. 



IN THE last number of these Proceedings (Proc. N. S. Ent. Soc. No. 1:7-36), the life 

 histories of three species of aphids injurious to orchards in Nova Scotia were 



briefly discussed and tables summarizing the same were given. Our studies 

 with these insects were continued throughout the past season and many facts of inter- 

 est recorded. 



Careful color drawings of the different forms of each species and of their chief na- 

 tural enemies have been prepared by Mr. L. G. Saunders of the provincial entomolo- 

 gical staff, and these, with descriptions, will be published when the work is completed. 

 Our work is still far from finished, but a few random notes regarding one species viz: 

 Aphis malifoliae Fitch, are herein recorded. 



THE EGG. 



The eggs are not laid in such numbers or in such conspicuous situations as those of 

 the green aphis. They are usually hidden under a bud scale or in a crack or crevice in 

 the bark and, though generally on the twigs or smaller branches, are sometimes deposit- 

 ed upon larger limbs or trunk. In the insectary they were laid anywhere upon the seed- 

 lings used in the experiments, even on the leaves. The eggs are usually all hatched by 

 the time the buds burst, which in most seasons will be during the first or second 

 week in May. 



THE STEM MOTHER. 



The stem mother settles down early in life on the under side of an unfolding leaf, 

 which, as it develops, curls around her, forming a protecting sheath. 



Occasionally on examining one of these curled leaves, a mature stem mother will 

 be found inside, with all four cast skins. Sometimes two or three stem mothers will 

 befound in a single curled leaf. 



The stem mothers begin to reach maturity at a period corresponding roughly with 

 the full bloom of the apple, and continue for some time later, i.e. during the last week in 



