KEY TO AMERICAN INSECT GALLS 



125 



Subconical, solitary or compound leaf, stem, petiole or fruit gall with a bluntly 

 truncate, dehiscent larval cell, diameter about 4 mm. Wells '16, p. 277 



Itonid. Ceci domyia sp. 



Humuhis (hop) 

 Swollen stems, diameter i cm, length 4 to 50 cm. Fig. 119. Felt. '07a, p. 151 

 Itonid. Hop stem gall, Lasioptera humulicaulis Felt 



Urtica (nettle) 

 Globose, hoary, pubescent, yellowish white gall on the under surface of the 

 leaf, diameter 4 mm. PI. 7, fig. 8. Felt 'iij, p. 474 



Itonid. Nettle bullet gall, Cecidomyia sp. 

 Urn-shaped, subsessile, pale green midrib or vein gall, diameter 3 mm. Osten 

 Sacken '75, p. 202 



Itonid. Nettle urn gall, Cecidomyia urnicola O. S. 



Laportea (wood nettle) 



Irregular, oval, stem gall. Felt 'iij, p. 463 



Itonid. Cecidomyia sp. 



Fig. 120. Ce- 

 cidomyia sp. 

 Bud gall on Lapor- 

 tea. (Original) 



Fig. 121. Ce- 

 cidomyia boeh- 

 m e r i a e Beutm. 

 Stem gall. (Origi- 

 nal) 



Irregular, probably bud gall, length 1.2 cm. Fig. 120. Felt 'iij, p. 463 



Itonid. Cecidomyia sp. 



Boehmeria (false nettle) 



Fusiform stem gall, length 12 mm, diameter 6 mm. Fig. 121. Beutm. '08, p. 74 



Itonid. Cecidomyia boehmeriae Beutm. 



Aristolochiaceae (birthwort family) 

 Aristolochia (birthwort) 



Ovate leaf gall, diameter 4 mm. Hagen '81, p. 37 



Itonid. Cecidomyia h a g e n i Aldr. 

 Small, woolly capsule on under surface of the leaf, on A. macrophylla. 

 Chadwick '08, p. 127 



? Acarid. Eriophyes sp. 



