Kaltenbachiella ulmifusa (Walsh & Riley)

Galls on Ulmus rubra are large, spindle-shaped, bag-like, about 2.5 cm long, green when young and becoming straw-coloured when mature, projecting upward from mid-rib of leaf (fig. 134I and Patch 1910b). Emigrant alatae, BL 1.4-1.5 mm, with media either unbranched or once-branched, leave galls in June-July to found colonies on roots of Lamiaceae; successful transfers were made to Lycopus virginicus (Smith 1985). Apterous exules are yellowish orange with wax-wool (C.F. Smith, pers. comm.); BL unrecorded. Distributed throughout the range of U. rubra in North America, and recently reported (on Ulmus) in China (Jiang et al. 2004).

- Roger Blackman, Victor Eastop: (2013) Aphids on the world's plants^©

Reference: http://www.aphidsonworldsplants.info/d_APHIDS_K.htm#Kaltenbachiella