CHERMES OF MAIXE CONIFERS. 307 



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



Ripening first of July. Migrants ovipositing on spruce Picca 

 sp. shnilis. 



3. Gall usually well formed 2-ii in. long. Needles not much abbre- 



viated. Ripening mid-July. iMigrants ovipositing on needles 

 of white pine. (Piiius sirobiis L.) floccus. 



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

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

 laricina Koch.) consolidatus. 



B. Galls on white spruce. 

 Gall terminal, 



Scraggly deformed branch. Ripening first of July. JMigrants 

 ovipositing on spruce {Picca sp.) simUis. 



Gall not terminal, 



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



on needles of larch. {Larix laricina Koch.) lariciatiis. 



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



migrating to oviposite. abietis. 



C. Galls en Norway spruce, Picca abics (L) Karst. 

 Gall terminal, 



Scraggly deformed branch. Ripening first of July. ]vligrants 



ovipositing on spruce, Picca sp. siiiiilis. 

 Gall not terminal, 



Pine-apple shaped. Ripening mid-August. \\'inged form not 



migrating to oviposite. abietis. 



Explanation of Peates. 



Fig. 108. Chcriiics pinifoliac Fitch. Migrant from spruce gall to 



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

 Fig. no. CJtcniics floccus Patch. ^ligrant from spruce gall to needles 



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

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

 Fig. 113. CJiermes siinilis Gillette. Form which emerges from spruce 



gall. Figs. 114, 114a. Antenna. 

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



Fig. 116. Antenna. 

 Fig. 117. Chermcs abietis. pupa developing in spruce gall. 

 Fig. 118. Chermcs lariciatus Patch. IMigrant from spruce gall to 



needles of larch. Figs. 119, 119a. 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. CJiermes lariciatus. Pupa developing in spruce gall. 

 Fig. 123. Chermcs consolidates Patch. ^Migrant which develops in 



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



spines. 



