35' CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



as long as the tarsi ; tarsal digitules long and slender, the claw 

 large and strong. 



On twigs and stems of Azalea, Rhododendron and Crataegus. 



Hartford, 26 July, 1916 (P. Hansling) ; New Haven, 5 June, 1922 

 (M. P. Z.). 



E. quercus (Comstock). Rhisococcus quercus. 



Kept. U. S. Dept. Agr., 340, 1880. 



Female tibiae twice as long as tarsi. 



On oak, Vaccinmm and grass. 



Recorded from Massachusetts and probably occurs in 

 Connecticut. 



Phenacoccus Cockerell. 



Females with antennae of nine segments, and which construct 

 more or less distinct ovisacs. Only two species are found in our 

 territory, one an important pest of maple shade trees, and the other 

 occurs in ants' nests. 



Key to Species. 



Forming cottony egg-mass on maple leaves ; female 5 mm. in length 



acericola 

 Without wax covering, in ants' nests ; female 3.5 mm. in length . . 



americanae 



P. acericola King, erroneously Pseudococciis aceris. Woolly 

 maple leaf scale. False maple scale. (PL xiii, 5 and 6.) 



Can. Ent, xxxiv, 211, 1902. 



Appearing on the under sides of the leaves as an irregular oval 

 cottony mass, in the center of which is the female and her eggs. 



Female: Length about 5 mm., width about 3 mm., light yellow; 

 spinnerets scattered over the dorsal surface, most abundant at pos- 

 terior extremity. Margin of body with several groups of stout 

 spines ; antennae of nine segments, the ninth being longest ; first, 

 second, third and fifth about equal, with the fourth, sixth, seventh 

 and eighth shorter and subequal. 



The young are hatched on the leaves, where they feed until 

 mature, the males transforming in white woolly cases in the crev- 

 ices of the bark. On the approach of winter the females also go 

 into the crevices of the bark of the trunk and larger branches where 

 they hibernate in woolly wax cases similar to those of the males. 

 There are three generations each year. 



On sugar and Norway maple. A pest of shade trees in cities. 

 Occurs throughout the state. 



New Haven, 29 Aug., 1905; 10 Aug., 1911; i July, 1919; West Haven, 

 26 March, 1906; 31 Aug., 191 5; Bridgeport, 11 Feb., 1906; 16 Oct., 1911 ; 

 Hartford, 27 March, 1906; Danbury, 13 Aug., 1907; 14 June, 12 July, 

 191 1 ; New Britain, 9 Aug., 1906; 3 Sept., 1912; Meriden, 17 Apr., 1907; 

 9 Sept., 1912; 14 Sept., 1915; Greenwich, 3 July, 1909; 20 Aug., 1910; 

 Stamford, 22 Aug., 1910; Ansonia, 12 Aug., 19 Sept., 191 1 ; South Norwalk, 

 26 March, 1912; New London, 25 July, 1913; Waterbury, 19 Aug., 1915; 

 Glastonbury, 11 Aug., 1919; Naugatuck, 16 Aug., 1919. 



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