KEY TO AMERICAN INSECT GALLS 



59 



Irregularly rounded or elongate, woody, polythalamous twig swellings much 

 like those of A. c o x i i, on Q. v i r g i n i a n a. Beutm. '09, p. 281 



Cynipid. Compsodryoxenus maculipennis Ashm. 

 Irregular, dense, corky, polythalamous twig swellings, length 4 cm, diameter 

 1.6 mm, on Q. u n d u 1 a t a. Gill. '92, p. 247 



Cynipid. Andricus frequens Gill. 

 A gradual twig or branch swelling 3.6 to 8 cm long and 12 to 24 mm in diameter, 

 on Q. cine re a. Ashm. '85, p. VIII 



Cynipid. Andricus medullae Ashm. 



Fig. 56. Oak 

 twig _ midge, 

 Lasioptera 

 quercip erd a 

 Felt. (Original) 



Fig. 57- 

 Bass. 



Gouty oak gall, Andricus punctatus 

 Old gall and one in section. (Original) 



Irregular twig enlargement similar to that of A. medullae, length 1.2 

 to 3 cm, on Q. c h r y s o 1 e p i s. Ashm. '97, p. 124 



Cynipid. Callirhytis chrysolepidicola Ashm. 

 Oblong, irregular, woody swellings on leaf petioles or at the base of the new 

 shoots, length 8 to 9 mm, diameter 3.5 to 4 mm, on Q. 1 a u r i f o 1 i a. Fig. 

 53, II. Beutm. '10, p. 125 



Cynipid. Neuroterus longipennis Ashm. 

 Irregularly rounded or elongate, somewhat potato-shaped, polythalamous oak 

 twig gall, length 15 to 30 mm, diameter 14 to 20 mm, on unknown scrub oak. 

 Beutm. '07, p. 464 



Cynipid. Andricus wheeleri Beutm, 



