1918] Weiss and Dickerson — Nofes on Trioza Alacris 59 



Fig. 26. Panorpa nebulosa, Westw. (Mecoptera) , ventral. 



Fig. 27. Panorpodes of Fig. 19, ventral. 



Fig. 28. Nannochorista dipteroides, Tillyard (Mecoptera), dorsal 

 view, based on Fig. 11 of Plate XVII, by Tillyard, 1917 (Proc. 

 Linn. Soc. N. S. W.). 



Fig. 29. Merope tuber, Newm. (Mecoptera), ventral. Gono- 

 pods cut off. 



Fig. 30. Philopotamus Sp. n.? (Trichoptera) , lateral. 



NOTES ON TRIOZA ALACRIS FLOR IN NEW JERSEY. 



By Harry B. Weiss and Edgar L. Dickerson.^ 

 New Brunswick, N. J. 



This Psyllid, which was introduced into New Jersey from Bel- 

 gium and which is well known and destructive in Europe, has al- 

 ready been recorded as occuring in New Jersey (Weiss, Canadian 

 Ent. Feb., 1917, pp. 73-75). D. L. Crawford in the Monthly 

 Bulletin of the California State Commission of Horticulture Vol. 

 I, No. 3, p. 86, gives an account of its presence in California together 

 with suggestions for its control and also treats it in his Monograph 

 of the Psyllidse of the New World, Bull. 85, U. S. N. M. 



It occurs in New Jersey on bay trees which are kept either under 

 glass all the year or out of doors during the summer and under 

 glass the remainder of the year. The following observations were 

 made on trees kept outside during the summer months. Its 

 presence on Bay {Laurus nobilis) can be readily detected by the 

 curled, discolored, swollen, blistered leaves, usually at the tips of 

 the branches, containing what appear to be whitish masses. Upon 

 uncurling a leaf the nymphs are readily seen clothed in a white waxy 

 secretion. In severe infestations the tree has a sickly and unwhole- 

 some appearance. 



In New Jersey, the Psyllid overwinters as an adult on bay trees, 

 which are kept in storage houses where the temperature is never 

 allowed to go below 38 or 40 degrees F. About the middle or end 

 of May according to the weather, the trees are moved outside and 

 at is then when egg laying starts. 



1 The arrangement of the authors' names has no significance and indicates neither seniority 

 nor precedence. 



