l8 NEW YORK STATE MUSEUM 



Kidney shaped enlargements at base of needles of P. e d u 1 i s, length 7 mm, 

 diameter 4 mm, the walls thick and the needles rudimentary. Fig. 8. 



Itonid. Thecodiplosis cockerelli Felt 

 Globose swellmg at base of needles on P. v i r g i n i a n a. Fig. 11. Felt 'i2e, 

 p. 148 



Itonid. Janetiella coloradensis Felt 

 Base of needles of P. r a d i a t a. Snow and Mills '00, p. 489 



Itonid. Western pine needle gall, Thecodiplosis piniradiatae 



Sn. & Mils. 



Picea (spruce) 

 Green or brown, polythalamous, conehke swellings on Norway spruce. Fig. 9. 

 Felt 'o6b, p. 189 



Aphid. Spruce cone gall, Chermes abietis Linn. 



Fig. 7. Pine 

 needle gall, 



Cecidom y i a 

 pin i r i gid a e 

 Pack. Typical 

 swelling at base 

 of the leaf. 

 (Original) 



Fig. 8. Thecodiplosis cockerelli Felt. 

 Deformed needles of P . e d u 1 i s. (Original) 



Green or brown, polythalamous, produced, conelike swelling on Colorado blue 

 spruce, length 5 cm, diameter 2.5 cm. PI. 14, fig. i. Felt 'iim, p. 37 



Aphid. Long spruce cone gall, Chermes cooleyi Gill. 



Abies (fir) 



Reared from seeds. Fig. 10. Felt 'i5e, p. 162 



Itonid. Fir seed midge, Dasyneura canadensis Felt 

 Infertile seed of Douglas fir. Crosby '09, p. 379 



Hym. Fir seed wasp, Megastigmus sperm otrophus 



Wachtl. 

 Apical bud gall. PI. 5, fig. 9. Felt '143, p. 77 



Itonid. Spruce bud midge, Rhabdophaga swainei Felt 

 Bud galls and swellings at base of leaves. Felt '07a, p. 123 



Itonid. Spruce gall midge, Phytophaga tsugae Felt 



• Probably occurs on hemlock also. 



