6 BULLETIN 833, U. S. DEPARTMENT OF AGRICULTURE. 
From these data it is apparent that the insect is a serious pest, 
especially in cases where growers require from 50,000 to 100,000 plants 
for their own use and five to ten times this number to fill annua] 
orders for shipment. 
x 
[ PE SHod ere s'57 
Fic. 2.—The chrysanthemum midge: A, Leaf covered with galls; B, a single gall, more enlarged; C, gall 
cut open from above, showing young larva within; D, two gallscut in vertical section; £, larva, enlarged 
about 13times; F, pupa; G, fly emerging from a gall on right, discarded pupal skin remaining in opening 
ofgall onleft; H, adult female fly, enlarged about 13 times; J,eggs. (9th Ann. Rept. State Ent. Ind.) 
TECHNICAL DESCRIPTION.! 
Egg [fig. 2, I].—Reddish orange, length .15 mm., diameter .03 mm., the extremities 
narrowly rounded. 
Gall [fig. 2, A, B, C, D, G].—Conical swelling projecting obliquely from the surface. 
Size about 2 mm. in length. Color, generally green. Reddish green when growing 
outside and depending on variety affected. Tips appear dried out and grayish at 
' Technical description of egg, larva, pupa, male, and female taken from Felt (20). 
