IOI 



LIST OF 

 CECIDOMYID^E FOUND NEAR TADCASTER. 



FRANCIS G. BINNIE. 



The arrangement here followed is that of Dr. Schiner's ' Catalogus 

 Systematicus Dipterorum Europae,' 1864. The chief interest in 

 these minute gall-midges is to be found in their economy and pro- 

 ductions rather than in the perfect insects themselves. The name 

 of each species is followed, therefore, by an indication of its food- 

 plant, and the gall is briefly characterised. 



Diplosis tritici, the well-known wheat-midge, is the only species 

 in this list which is not a gall-maker, but lives free, often causing 

 considerable injury. 



Cecidomyia rosaria Lw. Gall found on various willows ; terminal 



compact cluster of leaves, with central cell containing a single 



larva. Newton Kyme ; Stutton. 

 Cecidomyia persicaria^ L. On Polygonum persicaria. Margin 



of leaf rolled, swollen, and reddish. Stutton. 

 Cecidomyia salicina Schrk. On Salix alba. End of shoot 



arrested and somewhat twisted. Newton Kyme ; Stutton. 

 Cecidomyia onobrychidis Bremi. On Vicia cracca. Folded 



fleshy leaflets. Near Catterton. 

 Cecidomyia marginemtorquens Bremi. On Salix viminalis. 



Margin of leaf folded. Willow-garth, Stutton. 

 Cecidomyia crata^gi Winn. On Crataegus oxyacantha. End of 



shoot arrested, forming a tuft of leaves. Common ; Tad- 

 caster, etc. 

 Cecidomyia veronicas Bremi. On Veronica chamadrys. Terminal, 



forming woolly globular heads. Everywhere ; Tadcaster, 



Spofforth, etc. 

 Cecidomyia galeobdolontis Winn. On Galeobdolon luteum. 



Axillary woolly gall. Boston Spa. 

 Cecidomyia urticae Perris. On Urtica dioica. Irregular swellings 



of mid-rib and principal veins of leaf. Common; Tadcaster, etc. 

 Cecidomyia ulmariae Bremi. On Spiresa ulmaria. Leaf-gall, 



hemispherical above, produced into a cone beneath. Every- 

 where. 

 Cecidomyia bursaria Bremi. On Nepeta glechoma. Oblong- 



cylindric hairy gall on upper surface of leaf. Boston Spa ; 



Stutton. 



April 1889. 



