Bui. 808, U. S. Dept. of Agriculture. 
Plate IV. 
Jointworm Flies of the Genus Harmoljta. 
A, Characteristic galls of H. hordei, some clearly showing that the plants were 
straw-fallen. About actual size; B, Larva of H. grandis form viinuta in a cell 
in the center of a wheat stem. Greatly enlarged: C, Larva of H. albomaculata 
in a timothy stem (Phleurn vratense). 'Greatlv enlarged; D, H. hordei touching 
the ovipositor to barley stem, the first process in oviposirion; E, forcing the 
ovipositor into the stem, the second step; F, the ovipositor completely down, 
the third and last step, and the abdomen resting lightly against the stem. 
About natural size. 
