ON TIO NEW SPECIES OF CECIDOMYID FLIES PRODUCING GULLS 
ON ANTENNARIR PLflNTAGINIFOLIA. 
WM. M. WHEELER. 
During the spring months of 1S8S and 1889 I observed 
that the plantlets of Antennaria plantaginifolia covering 
a sloping pasture in an open wood near St. Francis, Mil¬ 
waukee, had been so severely attacked by Cecidomyids as 
to have almost all their terminal buds converted into 
galls. As the plant infested is only a weed and the dies 
consequently of no agricultural interest, I at first deter¬ 
mined to leave undescribed the two new species which 1 
reared from the galls, but careful examination of the larvae 
during pupation convinced me that I had found a subject 
which would reward careful morphological study, especi¬ 
ally as there was no lack of material. I shall probably 
publish at some future time the results of my investiga¬ 
tions on the tissue changes accompanying metamorphosis, 
and for this reason have concluded to describe the two new 
species. 
CECIDOMYIA ANTENNARIiE, N. sp. 
Ovum. Length, .404 mm; cylindrical, about 6 times as long as wide, 
ightly curved, with rounded poles; yolk orange red, chorion an 
ne membrane transparent. 
Larva. Length, 4 mm; tapering at both ends, inttrse^men a 
actions not very deeply marked, orange red, the pigment, w 
: ated in the corpus adiposum, being slowly soluble in "O p 
cohol; two minute black pigment dots close together in t e 
^sal-line on the anterior segment; chitinous cuticle ne y papi 
nder a high power; movements sluggish. 
Pupa. Length, Female 3.5-3,75 mm. Male 2,75-3 ^ when 
>«ng orange, the head, thorax and sheaths of all the cephahc and 
loracie appendages red; when ready to hatch, shear is o app " 
