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NEW YORK STATE MUSEUM 



d Galls on twigs, consisting of fibrous material which conceals one or more cells containing larvae 



(i) Cells large, solitary or clustered 



Elongate or oblong, woody, tubelike twig gall resembling a date" seed, sessile 

 on the branch and covered with long, brownish yellow wool, length 2 cm, 

 diameter 5 to 7 mm, onQ. chrysolepis. Ashm. '97, p. 1 17 



Cynipid. Woolly tube gall, Andricus dasydactyli Ashm. 



Elongate, irregular, hard, woody cell, broadly attached to the twig and covered 



with a compact mass of white, woolly substance sometimes tinged with red 



or brown, length 15 to 20 mm, diameter 12 to 20 mm, on Q. minor. 



Beutm. 'oQf, p. 248 



Cynipid. Andricus aciculatus Beutm 



Pig. 66. Oak fig gall, 

 Biorhiza forti- 

 cornis Walsh. (Origi- 

 nal) 



Fig. 67. Wool sower, Andricus 

 seminator Harr. (Original) 



(2) Cells small, numerous, massed in a cluster beneath the fibers 



Globular white, pinkish marked, woolly growth containing seedlike grains 

 and occurring on twigs in June, diameter 2.5 to 4 cm, on Q. alba. Fig. 

 67. Walsh '70, p. 71 



Cynipid. Wool sower, Andricus seminator Harr. 

 Among the fibers of fresh Andricus seminator galls 



Itonid. Cecidomyia sp. 

 Round, woolly twig gall containing seedlike grains and closely resembling that 

 ofC. seminator Harr., on Q. nigra. Osten Sacken '62, p. 256 



Cynipid. Callirhytis operator O. S. 



