REPORT OF THE STATE ENTOMOLOGIST 1908 15 
Remedial measures. This leaf feeder should be easily con- 
trolled by timely applications of an arsenical poison, preferably 
arsenate of lead. 
Bibliography 
1888 Lintner, J. A. Ins. N. Y. 4th Rep’t, p. 44-46. (Brief account, as 
Aulacomerus lutescens) 
1889 ———— Ins. N. Y. 7th Rep’t, p. 223-24. (Synonymy, as Aula- 
cemerus litvesecen:s ) 
1906 Felt, E. P. N. Y. State Mus. Mem. 8, 2:568-69. (General account) 
} 
Grape blossom midge | 
Contarinia johnson Sling. 
The work of this little midge has been observed here and there 
in Chautauqua vineyards for the last four years. The enlarged 
blossom buds, infested by maggots, have been found in small 
numbers each spring. Nothing was known as to the source of 
these little pests, aside from the fact that they were produced by 
some small fly. It was not till the spring of 1909 that we were 
enabled to rear this insect and show that it belonged to the genus 
Contarinia and has as allies several destructive species. One closely 
related form, Contarinia violicola Coq., has proved very 
injurious to the extensive violet-growing industry located at Rhine- 
catt; .N: YY. Another amember of this geaus, Contarinia 
pyrivora Riley, is well known on account of its destroying 
youne pears. A third form, Contarinia sorghicola 
Coq., infests sorghum in the South and causes a serious shrinkage 
_in the production of seed, while a West Indian species, Conta - 
rinia gossypii Felt, is injurious to cotton. In addition, 
Contarinia viticola Rubs., which further study may show 
to be identical with the species attacking grape blossoms in the 
Chautauqua region, has been recorded as injurious to grape blos- 
soms in Europe by Rutbsaamen,’ a noted authority upon this group. 
Injuries. The grape blossom midge of the Chautauqua region 
was first observed in scattering numbers by the late Professor 
Slingerland and Fred Johnson in 1904, at which time it was re- 
corded from the towns of Ripley, Westfield, Portland and Brocton. 
It has occurred in small numbers from year to year since then, and 
in 1908 aroused considerable apprehension among growers on ac- 
+1906 Riibsaamen, E. H. Zeitschrift fiir Wissenschafiliche Insekten- 
biologie, 2:194-08. 
1909 ———— Die Wichtigsten deutschen Reben-Schadlinge und Reben- 
Niitzlinge, p. 74-76. 
