Bui. 808, U. S. Dept. of Agriculture. 
Plate 
Jointworm Flies of the Genus Harmolita. 
A, Characteristic manner in which H. vaginicola dwarfs wheat plants. These 
plants rarely form grain. About one-third natural size; B, Head from a plant 
dwarfed by H. vaginicola with the surrounding leaf sheath removed, showing 
the galls in the sheath and not in the stem. Slightly reduced; C, Characteristic 
galls of H. vaginicola. Note the rootlike growth at the base of galls. Slightly 
reduced; D, Galls of H. captiva in bluegrass (Poa pratensis). There is little 
external evidence of the galls. Note that the galls are placed end to end. Slightly 
reduced. 
