No. 34-] HEMIPTERA OF CONNECTICUT I COCCIDAE. 349 



Key to Genera. 



1. Adult female with a hard shell; legs absent; no cottony wax 



secretion , 2 



Adult female soft-bodied; legs present; white cottony wax secre- 

 tion 3 



2. Body of insect forming a hardened gall-like excrescence usually 



dull in color and conspicuous on twigs Kermes, p. 350 



Body of insect soft and variable in color, but covered with a hard 

 smooth and shining "shell," situated in a depression or pit in 

 the bark . . Asterolecanium, p. 349 



3. Anal ring with eight hairs .... 4 



Anal ring with six hairs 5 



4. Adult female dorsally naked, with a fringe of white wax filaments 



Gossyparia, p. 349 



Adult female enclosed in a cottony sac, caudal lobes long 



Eriococcus, p. 351 



5. Antennae with nine segments Phenacoccus, p. 352 



Antennae with seven or eight segments ; body oval 



Pseudococcus, p. 353 



Asterolecanium Targioni-Tozzetti. 

 Asterodiaspis Signoret. 



Only one species of this genus occurs in the northeastern United 

 States and this species came from Europe. 



A. variolosum (Ratzeburg) Asterodiaspis quercicola. Pitted 

 oak scale. (PI. xiii, 2.) 



Tharander Jahrbuch, 187, 1870. 



Adult female: Length 1.5mm., breadth 1.25mm., nearly cir- 

 cular, slightly attenuated posteriorly, exterior of case yellowish 

 green, often turning brown after death ; smooth and shining, 

 glassy, with a marginal fringe of minute curved glassy rods; 

 moderately convex, partially imbedded in a depression or pit in 

 the bark. 



This species was recorded from New Haven, March, 1905, under 

 the name of Asterodiaspis quercicola. 



Found occasionally on English oak, Quercus robur, and its 

 variety aurea in nurseries and ornamental plantings. 



Hartford, 9 May, 1903; New Haven, March, 1905, 21 Aug., 1915; Yales- 

 ville, 4 Sept., 1917, 30 Sept., 1918. 



Gossyparia Signoret. 



The females of this genus are soft, naked on dorsum and fringed 

 around the margins with white cottony wax secretion. Only one 

 species occurs within our territory. 

 G. spuria (Modeer) ulmi. Elm scale. (PL xiii, 3.) 



Act. Goth., i, 43, 1778. 



Adult female 2-2.5 mm - m length, oval, reddish or purplish in 

 color, dorsum naked, surrounded by an irregular white fringe of 

 cotton-like wax threads. Antennae of six segments, the second 



