556 ' JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 10 



certain to reveal that the unthrifty condition of the vines, in these 

 infested areas, is due primarily to some other agency. Such agency 

 may be drought, unsuitable land for cranberry production, or the 

 attack of other cranberry insects of well-known economic importance. 



The remedy should, therefore, be directed at the removal of the 

 greater pests, such as the fireworms, the cranberry girdler or the cran- 

 berry rootworm, if any of these are present, and, in general at improv- 

 ing conditions for growth of the vines by better cultural methods such 

 as pruning, sanding and the application of commercial fertilizers. 



If the bog can be refiowed during the summer the bugs may easily 

 be exterminated by applying the water for twenty-four hours, prefer- 

 ably during a period of cloudy weather, about the 1st of August. All 

 of the nymphs will have hatched at that time and no eggs of the new 

 adults will have been laid. A slight wind will blow the bugs to one 

 shore where they may be killed by the use of a kerosene burning spray 

 torch. 



Literature Cited 



(1) Smith, J. B. 1884. Reports of Observations and Experiments in the Practical 



Work of the Division. In U. S. Dept. Agr., Div. Ent., Bui. 4, p. 30. 

 (2) . 1900. Insects of New Jersey. In Sup. 27th Ann. Rpt. State Bd. Agr., 



1893, p. 87. Trenton. 

 (3) SwEZEY, Otto H. 1904. A Preliminary Catalogue of the Described Species 



of the Family Fulgoridse of North America, North of Mexico. In Ohio Dep. Agr., 



Div. Nurs. and Orchard Insp., Bui. 3, p. 10. 



STUDIES ON THE MORPHOLOGY AND SUSCEPTIBILITY OF 

 THE EGGS OF APHIS AVEN^ FAB., APHIS POMI DEGEER, 

 AND APHIS SORBI KALT. 



By Alvah Peterson, Ph. D., Assistant Entomologist, New Jersey Agricultural 



Experiment Station 



A number of observations have been made on the structure and 

 behavior of the outer coverings of the eggs of three species of aphides, 

 A. avence, A. pomi and A. sorbi, found on apple trees. Some of the 

 facts observed during the dormant period of the egg and at the time of 

 hatching have an important bearing on certain control measures and 

 these will be reported in brief with the expectancy of giving a more 

 detailed account in the near future. 



Explanation of Plate 29 



Plate 1. Amphiscepa bimttata Say: A, Placement of the eggs in cranberry wood, 

 X 7; B and C, Tufts of woody fibre above the egg punctures in cranberry wood, X 7; 

 D, Adults on cranberry upright, X 62; E, Pupal instar, X 7; F, Cast skin of 4th instar, 

 X7. 



