37 2 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



A. abietis (Schrank). Hemlock scale. 



Beitr. Z. Naturg., 48, 1776. 



Scale of female : Length 2-3 mm., dark gray, varying from 

 nearly circular to elongate with ends rounded ; exuviae subcentral, 

 orange. 



Female : Median lobes separated, small and variable ; both inner 

 and outer margins notched; rounded apically; two pectinae 

 between the median lobes. There are four groups of circum- 

 genital gland-orifices; anterior lateral, 9-1 1 ; posterior lateral, 5-6. 



Scale of male: Length 1.4mm., similar to scale of female, 

 though smaller and darker. 



On hemlock. 



Norwalk, 13 Mar., 1906 (W. E. B.) ; New Haven, 31 Jan., 1913. 

 A. ancylus (Putnam). Diaspis ancylns. Putnam's scale. 



Trans. la. Hort. Soc, xii, 321, 1877. 



Scale of female: Diameter 1-1.5 mm., dark gray or black, with 

 lighter gray margin; exuviae subcentral, brick red, covered with 

 a gray excretion which is easily removed by rubbing. The scales 

 often occur in clusters, and when crowded are more or less 

 irregular. 



Female : Median lobes large, well developed, well separated, the 

 inner margins parallel, usually entire, occasionally notched, the 

 outer margins notched. There are two pectinae between the lobes. 

 The five groups of circumgenital gland-orifices are as follows: 

 median, 2-3; anterior lateral, 6-10; posterior lateral, 4-9. 



Scale of male: Length i-i.5mm. ; of same color as female 

 scale, but smaller and more elongated. 



Though not an important pest, this scale is fairly common on 

 peach, cherry, currant, birch, beech, maple, and many other host 

 trees. 



New Haven, 19 Dec, 1899; 11 Apr., 1900; 11 Mar., 1901 ; 19 Apr., 

 1902; 20 Jan., 1906; Norwalk, 3 Nov., 1900; 7 Mar., 1901 ; Ansonia, 2 

 June, 1902; Storrs, 1 May, 1906. 



A. brittanicus Newstead. 



Ent. Mon. Mag., xxxii, 279, 1896. 



Scale of female: Diameter 1.75-2 mm., dusky ochreous, with a 

 broad, smoky brown central zone, moderately convex ; exuviae 

 subcentral, orange-yellow. Scales easily detached from host plant. 



Female : Median lobes emarginate, or notched on both outer and 

 inner margins, giving them a trilobed appearance. Second pair 

 of lobes nearly as large as median and of similar shape. There 

 are usually four groups of circumgenital gland-orifices, rarely a 

 median group of 2-3; anterior lateral, 7-10; posterior lateral, 7-8. 



Scale of male : Similar to scale of female, nearly circular, ovate 

 or elongate, fulvous. 



This species has been recorded from Massachusetts, and is found 

 on holly and Ruscus hypoglossum. 



