83 
to the group pseudo-galls. Next in importance in both respects 
come the gall-mites (Phytoptus), but almost all their produc- 
tions are pseudo-galls or open galls. The Aphididae cause very 
few galls with us, aud these are also pseudo-galls or open galls. 
The remaining gall-makers all cause true galls, and are confined 
to a limited number of natural orders of plants; the Saw- 
flies (Tenthredinide) being restricted in ‘Dee’ to the genus 
Salix; the Gall-flies (Cynipide) chiefly attacking the Oak, but 
some also occurring on the Roses, on Potentilla, and on Hier- 
acia; the Trypetide I have found only in the carpels of some 
Composite ; while the Beetles (curculionide) have their head- 
quarters in the roots of Crucifere, with three species attached 
to plants of other orders—one in the stem of Vicia Cracca, one 
in the scape of Plantago lanceolata, and one in the seed vessel 
of Campanula rotundifolia. 
