CHERMES OF MAINE CONIFERS. 307 



2. Scraggly deformed twig. Gall-needles not much abbreviated. 



Ripening first of July. Migrants ovipositing on spruce Picea 

 sp. similis. 



3. Gall usually well formed l-il in. long. Needles not much abbre- 



viated. Ripening mid-July. Migrants ovipositing on needles 

 of white pine. (Pinus strobus L.) floccus. 



4. Gall small, \ inch or less, pink or pale green. Gall needles short. 



Ripening first of August. Species also found on larch (Larix 

 laricina Koch.) consolidate. 



B. Galls on white spruce. 

 Gall terminal, 



Scraggly deformed branch. Ripening first of July. Migrants 

 ovipositing on spruce (Picea sp.) similis. 



Gall not terminal, 



1. Pine-apple shaped. Ripening last of July. Migrants ovipositing 



on needles of larch. (Larix laricina Koch.) lariciatus. 



2. Pine-apple shaped. Ripening mid-August. Winged form not 



migrating to oviposite. abietis. 



C. Galls on Norway spruce, Picea abies (L) Karst. 

 Gall terminal, 



Scraggly deformed branch. Ripening first of July. Migrants 



ovipositing on spruce, Picea sp. similis. 

 Gall not terminal, 



Pine-apple shaped. Ripening mid-August. Winged form not 



migrating to oviposite. abietis. 



EXPLANATION OF 



Fig. 1 08. Chermes pinifoliae Fitch. Migrant from spruce gall to 



needles of white pine. Figs. 109, ioo,a. Antenna. 

 Fig. no. Chermes floccus Patch. Migrant from spruce gall to needles 



of white pine. Figs, in, ma. Antenna. 

 Fig. 112. Chermes floccus, pupa developing in spruce gall. 

 Fig. 113. Chermes similis Gillette. Form which emerges from spruce 



gall. Figs. 114, 1143. Antenna. 

 Fig. 115. Chermes abietis. Form which emerges from spruce gall. 



Fig. 116. Antenna. 



Fig. 117. Chermes abietis, pupa developing in spruce gall. 

 Fig. 118. Chermes lariciatus Patch. Migrant from spruce gall to 



needles of larch. Figs. 119, H9a. Antenna. 

 Fig. 120. Chermes lariciatus. Migrant on needle of larch with egg 



mass nearly completed and showing through the thin transparent 



wings. Drawn from living specimen. 



Fig. 121. Chermes lariciatus. Egg mass on larch needle. 

 Fig. 122. Chermes lariciatus. Pupa developing in spruce gall. 

 Fig. 123. Chermes consolidatus Patch. Migrant which develops in 



spruce gall. Figs. 124, I24a. Antenna. Notice two strong terminal 



spines. 



