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 

 querciperda 

 Felt. (Original) 



Fig. 57. Gouty oak gall, Andricus punctatus 

 Bass. 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, 



