isor.j 55 



a dozen galls, and the inmates were still in the larval stage. Having 

 succeeded with the other in a glass tube, I placed these in similar 

 receptacles, two only changed to pupa, one on June 30th, 1890, and 

 emerged on July 25th, the other passed its excrement on July 8th, 

 changed to pupa on the 14th ; eyes began to colour on the 21st ; the 

 ocelli darkened on the 25th ; by August 5th the whole insect was 

 coloured dark green, two days later it was black ; on August 14th, 

 1890, the perfect fly appeared. Others obtained in September, 1890, 

 produced flies March 19th, 1892 ; another lot was obtained in Sep- 

 tember, 1893, and arrived at maturity April 13th, 1895. 



Andricus pilosus.— Cameron does not state when these flies 

 appear, he simply says, "galls found on ^ catkins in May," which is 

 correct, and galls obtained by me in May, 1888, produced flies on 

 June 10th following, and those collected in May, 1S95, produced flies 

 on May 22nd. No parasite is mentioned; I have, however, bred 

 Pteromalus tibialis in June. 



Drtophanta folii (= scuTELLAEis). — Camcron states, at page 

 123, that it "delivers the fly in October." My experience agrees with 

 that of Dr. Adler, viz., that the fly emerges in Januaiy or later, 

 according to the weather ; if it is a continuous sharp frost in early 

 spring it will remain in the gall until a thaw sets in ; I bred them in 

 1894 from January 18th to 25th. 



Dryophanta longiventris. — At page 125 Cameron says, gall 

 " found in August, and becoming ripe in October, when the flies leave 

 them." I do not find this to be the case, those that I bred came out 

 in December, and in one instance four came out on the 31st. 



TeIGONASPIS EENUM (mEGAPTERa) = BlORHIZA EENUM. 



Cameron does not say when this apterous species may be expected to 

 emerge from the galls. On October 21st, 1893, 1 gathered a quantity 

 of these galls, they were then fully ripe and falling to the ground ; on 

 January 17th, 1895, I discovered three apterous flies walking about 

 the flower pot in which I kept the galls, and on examining the galls 

 that remained I found the flies had all escaped ; I presume, therefore, 

 that they emerged in December, 1894. On referring to Dr. Adler's 

 book, I find that was also his experience. With regard to the sexual 

 form of this species, megaptera, the gall Cameron says appears in 

 May, but he does not say when the flies emerged ; I have always bred 

 them during the first half of June. 



Stonehouse, Plymouth : 



February 8th, 1897. 



