324 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



pore plates well developed. Composed of many several-sided 

 facets and bordered by a chitinous ring. 



Alate viviparous females with six-jointed antennae. Joint iv 

 distinctly greater than one-half of iii, usually about three-fourths 

 the length of iii. Secondary sensoria oval; without fringe of 

 celia. Wax pore plates well developed. Those of abdomen 

 similar to those of apterous forms. 



Fore wing with M simple. Media and cubitus both present in 

 hind wing. Cornicles wanting or present. 



Sexuals small, beakless, the females laying but one egg. 

 Antennae five-jointed. Species live exposed on stem or twigs of 

 host. 



Key to Species. 



Secondary sensoria on joints iii, iv and v of antennae. Cornicles 



wanting attenuatus 



Secondary sensoria on iii only. Cornicles present in alate forms aceris 



N. aceris (Monell). 



Can. Ent, xiv, 16, 1883. 



A flocculent species on the limbs of Acer. The peculiar 

 antennae of this and the succeeding species indicate their affiliation. 



On sugar maple, New Haven, 15 June, 1910; on maple, Bethel, 23 June, 

 1913 (R. C. Keeler). 



N. attenuatus (Osborn and Sirrine). 



Proc. la. Acad. Sci., i, 100, 1892. 



A flocculent species in dense colonies on stem of Smilax 

 herbacea. An account of this species with figures is given by 

 Patch (1912). 



Thecabius Koch. 



Stem mother with five- jointed antennae. Wax pore plates on 

 head, thorax and abdomen. Prothorax with six plates. The 

 central four in the form of a trapezoid. The forward pair small- 

 est and closest together. Cornicles wanting. Young of stem 

 mother all acquire wings. Third generation apterous. 



Antennae of alate viviparous females six- jointed. Secondary 

 sensoria broadly linear to narrowly oval, transverse, not fringed 

 with celia. Wax pore plates on mesothorax distant. Distance 

 between them greater than greatest diameter of plates. M of fore 

 wing simple. Hind wing with media and cubitus both present 

 Rudimentary gonopophyses, three. Cornicles wanting. 



Sexuals small, beakless and with antennae five- jointed. Females 

 lay but one egg. The species of this genus produce pseudo galls 

 on leaves of winter host. Summer hosts, trees and herbs so far 

 as known. 



Key to Species. 



1. Antennal joint vi and frequently v also, without secondary sensoria 2 

 Antennal joints iii to vi with secondary sensoria populi-conduplifolius 



(Fundatrigenia) 



