REPORT OF THE STATE ENTOMOLOGIST IQI7 149 
Youngomyia umbellicola O. 5. 
1871 Osten Sacken, R. Amer. Ent. Soc. Trans., 3:52 (gall and larva 
scribed, Cecidomyia) 
1876 Bergenstamm, J. E. & Low, Paul. Verh. k. k. zool.-bot. Gesell. Wien., 
:91 (Cecidomyia) 
1892 Beutenmueller, William. Amer. Mus. of Nat. Hist. Bul. 4:269 
‘ecidomyia) 
1907 ——————_ Amer. Mus. of Nat. Hist. Bul., 23:393 (Cecidomyia) 
I910 Stebbins, F. A. Springf. Mus. of Nat. Hist. Bul., 2:48 (Cecidomyia) 
The gall is a common, widely distributed deformity. It occurs 
erally in New York State and has been observed in other eastern 
ates and recorded from both Illinois and Missouri. Adults were 
ared April 13, 1887 from blossoms of elder, Sambucus, taken at 
adet, Mo., April 9. The material was kindly loaned for study 
wrough the courtesy of the United States National Museum. 

Fig. 53 Youngom yia um- 
bellicola, terminal antennal 
segment of female. Thisis densely 
haired, only a few setae being 
shown (enlarged, original) 

Fig. 52 Youngomyia umbelli- 
‘ola, fifth antennal segment of fer ale 
enlarged, original) 
Gall. Diameter 4 to 6 mm, globose and conspicuous because 
of the larger size in comparison with the normal, smaller flowers 
Plate s, fig. 2). The gall contains one or more orange-yellow larvae. 
Larva. Length 2.5 mm, pale yellowish orange, the head moderately 
long, broad, the antennae long, slender, the segmentation distinct, 
breastbone bidentate, distinctly chitinized, the shaft slender, some- 
what irregular and with an expansion posteriorly; skin coarsely 
shagreened, the subtruncate posterior extremity with a submedian 
pair of well-developed, upeurved, chitinous spines resting upon a 
Bather well-defined, chitinous plate. These spines are moved by 
