Fig. 
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W WW WO 
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. Hamamelistes spinosus, young larva, four th penernian E 
. Hamamelistes spinosus, young larva, first stage, fifth generation - 
. Hamamelistes spinosus, young larva, sixth or sexual generation __. 
. Hamamelistes spinosus, male and female antennze 
ILLUSTRATIONS. 
> Elormaphis hamamelidisyealls: 2) 2s a. eee eee 
. Hormaphis hamamelidis, young larve on bud, young stem-mother, 
ANtCNM AOC ee ee a i ey ate ee 
. Hormaphis hamamelidis, second stage of stem- mother ot Aare 
. Hormaphis hamamelidis, adult stem-mother ______ ____. eee 
. Hormaphis hamamelidis, second generation, young larva, pupa, 
MM STANt Pec eee ee as eae E Reet ae 
Hormaphis hamamelidis, third generation, young larva Bee, Goo 
Hormaphis hamamelidis, third generation, third stage 
. Hormaphis hamamelidis, third generation, fourth or final stage__- 
. Hormaphis hamamelidis, sixth generation, second stage..__. ____- 
. Hormaphis hamamelidis, sixth generation, return migrant... .._- 
. Hormaphis hamamelidis, sexual generation....__ ______.________- 
. Hamamelistes spinosus, winter eggs, eggsin position on nfower buds_ 
. Haniamelistes spinosus, twig of witch-hazel with young galls ____. 
. Hamamelistes spinosus, mature gall... ______.____.- 
. Hamamelistes spinosus, mature stem-mother _ 
. Hamamelistes spinosus, spring migrant 
. Hamamelistes spinosus, hibernating larva, antenna, etc 
. Hamamelistes spinosus, adult female, third generation 
. Hamamelistes spinosus, pseudo galls or corrugations on leaves of 
birch 
37 
