REl'ORT OF TJIE STATP: ICNTOM ()1.()( IIST \i)\J 



97 



small numbers and in i()o> desLroyc;! 6o to 75 \)^r cent of the early 

 Moore blossoms in one vineyard at, Fredonia. It was generally 

 distributed though not quite so injurious in igog. 



Life history. This midge appears in early June with the unfolding 

 of the blossom buds and deposits its eggs in the florets. These 



Fig. 26 Conta- 

 r in ia 3 o h n so n i, 

 fifth antennal seg- 

 ment of male (en- 

 larged, original ) 



Fig. 27 C o n - 

 tarinia john- 

 soni, fifth anten- 

 nal segment of 

 female (enlarged, 

 original) 



Fig. 28 Con- 

 tarinia John- 

 son i, side view 

 of male claws (en- 

 larged, original) 



hatch shortly and the yellowish maggots attain maturity within a 

 few days to a week after the injury becomes noticeable. Seven to 

 eight or ten larvae may occur in one blossom bud. The larvae 

 winter in the soil at the base of the vines, sometimes in large numbers. 



Fig. 29 Contarinia johnsoni, palpus of male (enlarged, 



original) 



The parent fly is a small, yellowish species, the mesonotum fuscous 

 yellowish and the basal portion of the stem of the fifth antennal 

 segment with a length one-half greater than its diameter. The 

 lobes of the dorsal plate are broad, obliquely tnmcate and sparsely 

 setose apically. 



