Cecidomyiidae 731 



CONTARINIA Rondani 

 C. agrimoniae Felt. Bath, Sep 3, reared from florets of Agrimonia striata. 

 C. ampelophila Felt. Albany, Ap 26, on grape. 



C. balsamifera Felt. L. Clear, Je 7, very common about balsam trees. 

 C. canadensis Felt. Southern Hudson R. Val., abundant; a possible maker of the 



familiar turgid midrib gall on ash generally ascribed to Cecidomyia pellex. 

 C. clematidis Felt. Newport, Aug 12, reared from an irregular, subglobular gall 



on virgin's bower. 

 C. divaricata Felt. Albany, Je 21, on hard pine. 

 C. flavolinea Felt. Albany, Je 11. 

 C. johnsoni Sling. Appears to be generally distributed in the Chautauqua grape 



region, and occasionally causes rather serious injury by blasting the blossom 



buds of grapes. 

 C. maculosa Felt. Albany, Jl 17, on bittersweet. 

 C. obsesa Felt. Albany, May 9, in pine woods. 



C, perfoliata Felt. Albany, Aug, reared from florets of thoroughwort. 

 C. pyrivora Riley. A pest of pears, well established in the Hudson R. Val.; New 



Baltimore, May. 

 C. rumicis Lw. Newport, Jl 18, reared from reddish or brown seeds of curled dock, 



Yg. 

 C. sambucifolia Felt. L. Clear, Je 7, on elder. 

 C. trifolii Felt. Albany, Je 1, on white clover. 

 C. truncata Felt. Albany, May 25. 

 C. viatica Felt. Albany, Je 9, on clover. 



C. virginianiae Felt. Infests the fruit of choke cherry (Prunus virginiana), pro- 



ducing an enlarged bladdery condition. Appears to be widely distributed. 

 Has been recorded from Bethlehem and Keene Valley, and is known from a 

 number of New England localities. 



Thecodiplosis Kiefifer 



T. hudsonici Felt. Poughkeepsie, Ap 19, on red cedar. 



T. liriodendri O.S. Tulip Spot Gall. Produces a dark, circular blister leaf gall 

 on tulip. Canandaigua L., Sep ; vie. Albany, sometimes common ; Liverpool, 

 Aug, H.D.House; Yonkers, Jl (Leon); Cornwall, Jl; Tivoli, Aug. 



T. mosellana Gehin. Batavia, reared from wheat chaff; Troy, Je, on rye heads. 



Dentifibula Felt 



D. caryae Felt. Albany, Je 19, on hickory. 



D. viburni Felt. Albany, Je 11, on maple-leaved arrowwood. 



Group TRIFILI 

 YOUNGOMYIA Felt 

 Y. podophyllae Felt. Albany, Je 11, on May apple. 

 Y. producta Felt. Karner, Jl 5, on bush honeysuckle. 

 Y. rubida Felt. Nassau, Je 29, on sedge. 



Y. umbellicola O.S. Produces a conspicuous, globose enlargement of the blossoms 

 of elder, and occurs generally in the State. 



