72 SEVENTEENTH Report STATE ENTOMOLOGIST OF MINNESOTA—1918 
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rings. Cornicles wanting. Cauda distinct, enlarged or globate. Anal 
plate divided or bilobed as in the Callipterina. Media simple; cubitus 
appearing as a branch of the anal; hind wings with one oblique vein. 
Biological characters. The Hormaphidini represent the extreme 
of the Pemphiginae line of development. Their approach to the 
Coccidae may be looked upon as a convergence rather than any close 
phylogenetic relationship. Their favorite habitat for hibernation and 
gall generations are Hamamelis and Betula. 
