50 N. S. ENTOMOLOGICAL SOCIETY. 



Adult (Female). Clypeus, five-eighths longer than broad, being slightly constricted 

 at base, subacute at apex; basal suture straight. Lorae, one-half longer than wide, of 

 equal length to clypeus. Genae, long; narrow. Front, one third longer than wide at 

 widest place above antennae; two and one half times as long as clypeus; superior 

 angle greater than a right angle. Length of head at middle of disc of vertex, about 

 two-thirds more than at eyes. Prothorax, twice wider than long; anterior margin 

 strongly procurved; posterior margin slightly procurved in centre; lateral angles broadly 

 rounded; scutellum one-half broader than long. Entire surface of head and thorax glab- 

 rous. Color, pale yellow. Eyes, greyish yellow, each facet being grey in color. Elytra, 

 hyaline, iridescent at tip; very slightly yellow. Legs, light yellow. Length 3.37 to 

 3.78mm. 



LIFE HISTORY. 



The emergence of this insect from the egg state begins a short time before the blos- 

 soms open and continues for some time after they fall. The first brood takes from four 

 to five weeks to reach maturity, the eggs of this generation being laid in the leaves of its 

 food plant. About a month elapses from the time the insects of the first brood reach 

 the adult state and the nymphs of the second begin to emerge. Owing, however, to the 

 long period over which emergence takes place in the spring, a certain overlapping of the 

 two broods occurs. The period of nymphal life of the second brood is from three to four 

 weeks. Shortly after reaching maturity the female lays the eggs for the next year's 

 brood in the twigs of the apple or the rose. The eggs are deposited obliquely in the bark 

 of the young growth, one or two in a place, and form small blisters upon the surface. 



NATURAL ENEMIES. 



The chief enemies of both species of leaf-hoppers are probably egg parasites. We 

 have dissected eggs of E. rosae from their blisters and found a large proportion attacked 

 by a minute hymenopterous parasite. We have not succeeded as yet, however, in hav- 

 ing any of these parasites identified. 



REFERENCES. 



The following are some of the chief references to the insect in North American lit- 

 erature: 



1. Weed, C. M. Notes on some Little Known Injurious Insects. Ohio Agr. Exp. 



1889 Sta. Vol. 2, No. 6. Sept. 1889. 5 Figs. 



2. Lintner, J. A. The Rose Leaf-hopper and Rose Slug. Country Gentleman. July 



1890 1890: 538, 



3. Gillette, C. P. & Baker, C. F., Preliminary List of the Hemiptera of Colorado. Bui. 



1895 No. 31. Tech. Series. No. 1. Col. Agr. Coll. : 112. 



4. Lintner, J. A. Rose Leaf-hopper. Country Gentleman. Oct. 1896:763 



1896 



5. Hillman, H. F. Some Common Injurious Insects of Western Nevada. Bui. No. 36. 



1898 Nev. Agr. Expt. Sta. Dec. 1897. 



