MOTH GALLS 
55 
Gypsonoma aceriana Dup. : Young branches swollen. 
Sciapteron tabcinifovme Rott. : Knotty swellings on the 
shoots. 
Poplar, Grey (Populus canescens, Sm.). 
Gypsonoma aceriana Dup. : Young branches swollen. 
Poplar, White ( Populus alba Linn.). 
Gypsonoma aceriana Dup. : Young branches swollen. 
Sciapteron tabaniforme Rott., var. rhingiaeforme Hub. : 
Branch swollen. 
Ragwort, Common ( Senecio Jacobaea Linn.). 
Phalonia atricapitana Ste.: Stem swollen. 
Ragwort, Marsh ( Senecio aquations Hill.). 
Platyptilia isodactyla Zell. : Stem swollen. 
Willows ( Salix , various species, see catalogue). 
Grapholitha Servilleana Dup.: Fusiform swellings on the 
older branches. 
Willow Herb ( Epilobium , several species, see catalogue). 
Mompha decorella Steph.: Swelling in the stem. 
The resin gall moth (Rhyacionia* resinella = Retinia resin - 
ella) occurs chiefly in the northern part of England and in 
Scotland. It is common in parts of Perthshire and Inver¬ 
ness. Mr. Adkin gives the life-history as follows : “ The 
egg is deposited on the twigs of the Fir, and, upon hatching, 
the young larva eats through the bark, forms the narrow 
gallery, and feeds upon the soft wood of the tender shoot 
then growing, this operation probably occupying its first 
summer. It now taps the bark on the opposite side to that 
by which it entered, and causes the sap to flow, which by its 
own weight spreads along the twig in the direction of the 
stem, congeals, and forms a resinous lump, the inside of 
which the larva gnaws away, at the same time devouring 
the bark and a portion of the wood next to it, as it becomes 
* The genus Retinia , though a well-established one, was displaced 
by Evetria. The latter has been recently replaced by Rhyacionia — 
a typical instance of the senseless and irritating changes in nomen¬ 
clature which are constantly being made in all departments of zoology 
and botany. 
