136 



NEW YORK STATE MUSEUM 



Irregularly oval, frequently fissured twig gall, length 3 to 4 cm, diameter 2.5 cm. 

 Felt and Joutel '04, p. 62 



Coleop. Thorn limb borer, Saperda fayi Bland. 



Fig. 137. Cecidomyia sp. on Crataegus, 32727. 

 (Original) 



Irregular twig swelling, resembling black knot of plum but with bright red 

 spores, length 1-2 cm, on C. o x y c a n t h a. 



Fungus. Cedar rust, Gymnosporangium globosum 



Fig. 138. Cecidomyia sp. 

 on Crataegus, ai840. (Original) 



Fig. 139. Thorn vein gall, L o b o p t - 

 eromyia venae Felt, typical and 

 confluent forms. (Original) 



Cockscomb leaf gall, green and red, length i cm. Felt '07a, p. 160 



Itonid. Thorn cockscomb gall, Hormomyia crataegifolia 



Felt 



