KEY TO AMERICAN INSECT GALLS 133 



Liqnuhunbar (sweet gum) 

 A tawny or brown erincum on the under surface of the leaf, in tlie angles of the 

 veins and elose to the petiole. Cliadwick '08, p. 152 



Acarid. Eriophyes sp. 



Platanaceae (plane tree family) 

 Platanus (buttonwood) 

 Reared from rolled leaves, probably predaceous on plant lice. Felt 'o8e, p. 410 

 Itonid. Lestodiplosis platanifolia Felt 



Exochorda 

 Small, confluent, lobulate leaf vein swelling, diameter i mm, length 4 to 6 mm. 



Fig. 132 



Acarid. Eriophyes sp. 



Rosaceae (rose family) 

 Spiraea latifolia (meadow sweet) 



Slightly enlarged, reddened flowers. Felt 'eye, p. 304 



Itonid. Spiraea flower midge, Itonida spiraeaflorae Felt 

 Reared from unopened flowers. Felt 'eye, p. 302 



Itonid. Prodiplosis floricola Felt 

 Globose axillary bud galls. PI. 14, fig. 9 



Cecid. Cecidomyia sp. 

 Deformed, deep-red or purplish and greenish leaf buds, length i cm, diameter 

 4 mm. Felt 'iij, p. 472 



Itonid. ? A s p h o n d y 1 i a sp. 

 Terminal, globular, usually green bud gall, diameter 4 mm. Felt '08a, p. 388 

 Itonid. Lobular bud gall, Hormomyia clarkeae Felt 

 Terminal, oval, brown bud gall, diameter 3 mm. Felt 'iik, p. 555 



Itonid. Itonida spiraeina Felt 



Terminal, clustered bud gall, diameter 3 mm, length 7 mm. Felt 'iik, p. 553 



Itonid. Clustered bud gall, Parallelodiplosis clarkei 



Felt 

 Terminal " cabbage " or " lettuce " bud gall. Felt 'iik, p. 547 



Itonid. Spiraea cabbage gall, Contarinia spiraeina Felt 

 Terminal bud gall, the leaflets fringed, diameter 3 to 4 mm. Felt 'iij, p. 473 



Itonid. Fringed bud gall, Cecidomyia sp. 

 Arrested development of flower buds. Chadwick '08, p. 148 



Acarid. Eriophyes sp. 

 Conic leaf gall forming a pustule on the under side, diameter 4 mm, height 2 mm. 



Fig. 133 



Itonid. Cecidomyia sp. 



Yellowish brown, spotted, blister leaf gall, diameter 3 mm. Felt 'oge, p. 287 



Itonid. Lasioptera spiraeafolia Felt 

 Thickened, greenish, midrib fold, length i to 1.5 cm, diameter .5 cm. PI. 12, 

 fig. I. Felt 'i5e, p. 106 



Itonid. Spiraea pod gall, Rhabdophaga salicifolia Felt 



Apparently reared from the same gall, probably predaceous. Felt 'o8e, p. 410 



Itonid. Lestodiplosis spiraeafolia Felt 



