AMERICAN DIPTERA. 347 



tips of deformed leaves. The whole appearance of the gall is not un- 

 like that of a ripe rose-apple (seed of a rose). The consistency of the 

 <rall, when young, is fleshy ; the cavity on the inside occupies about 

 one half of the diameter of the gall; it is filled with bright-yellow 

 larvae, which have the power of leaping by the contraction of their 

 bodies. Found in Tarrytown, May 28 1871. 



3. Additions and Corrections. 



As related by me in the Trans. Am. Ent. Sac. 18G9, p. 299. I 

 bred Aaphondi/lia monacha, O.S. from Solida go-galls in September 

 and October. Since then, I caught a male specimen of this insect on 

 the 17th of June 1871, near Tarrytown, N. Y., on what was appar- 

 ently a young shoot of Solidago. That the insect should reappear in 

 the early summer in order to lay its eggs on that plant, thus giving 

 rise to the growth of the future gall, is very natural. But the ques- 

 tion remains to be solved, what becomes of it between September and 

 June? The specimen caught by me was perfectly fresh and did not 

 look rubbed and battered, as insects which are covered with scales and 

 delicate decidous hairs usually do after hybernating. Did it belong to 

 a second brood ? And if it did, where does this brood develop ? Al- 

 most every gall suggests similar questions as to the mode of existence 

 of the gall-producing insect during the greater part of the year; but 

 in most cases, Ctcidomyix, on account of the uniformity of their color- 

 ing, hardly attract any notice, except in connection with galls. The 

 coloring of A. monacha however is so striking, that it affords a very 

 good oportunity for observations of this kind. 



This summer (June, 1871) at Tarrytown, N. Y., I have again ob- 

 served the enlarged buds of Samhucus racemosa, containing larvae of 

 Vecidomyia samhuci umhellicola (compare these Transactions, Vol. 

 in, p. 52.) The buds fall to the ground very easily, where, I sup- 

 pose, the transformation of the fly takes place. 



In the same paper (Trans. Am. Ent. Soc. Vol. Ill, p. 53), Cecid- 

 quercus majidis, should read C. q. majalis. 



