REPORT OF THE STATE ENTOMOLOGIST I908 1 5 



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. 4tli l^tp't, p. 44-46. (Brief account, as 

 Aulacomerus lutescens) 



1889 Ins. X. Y. /th Rep't, p. 223-24. (Synonymy, as Aula- 

 comerus lutescens) 



1906 Felt, E. P. X. Y. State Mus. Mem. 8, 2:568-69. (General account) 



i 

 Grape blossom midge 



Co)itariii{a johnsoni 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 v i o 1 i c o 1 a Coq., has proved very 

 injurious to the extensive violet-growing industry located at Rhine- 

 cliff, N. Y. Another member of this genus, Contarinia 

 pyrivora Riley, is well known on account of its destroying 

 young pears. A third form, Contarinia s o r g h i c o 1 a 

 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 Riibs., 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 Riibsaamen,^ a noted authority upon this group. 



Injuries. The grape blossom midge of the ChautJiuqua 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, Westficld, 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 Rubsaamen. E. H. Zcitsclirift fiir Wisscnschaftliclic Insekten- 

 biolnpie, 2 -.uj^-ijS. 



1909 Die Wichtigsten deutschen Reben-Schadlingc und Reben- 



Niitzlingc, p. 74-76. 



