No. 34- J HEMIPTERA OF CONNECTICUT I COCCIDAE. 359 



also been reported from New York and Ohio, but has not as yet 



been recorded from Connecticut. 



L. pruinosum Coquillett. robiniae. Frosted scale. 



Ins. Life, iii, 382, 1891. 



In some situations this scale is covered with fine powdery wax ; 

 hence the name.- In California it attacks the stone fruits as well 

 as apple, pear, ash, locust, walnut, grape, and rose. It has not 

 been recorded from Connecticut, though reported from Canada, 

 New York and Massachusetts.* 



L. quercifex Fitch, quercitronis, antennatitm. Oak Lecanium. 



Rept. Ins. N. Y., v, 805, 1858. 



This species attacks oak trees, and though not recorded from 

 Connecticut, it has been found in Canada, Massachusetts, and New 

 York. 



Saissetia Deplanches. 



Female scale nearly hemispherical, strongly convex; derm 

 closely crowded with large pores, circular to oval in shape ; middle 

 spiracular spine exceeding twice the length of the two outer spines ; 

 anal ring with eight hairs. 



One species is perhaps our commonest soft scale on greenhouse 

 plants and the others may also occur. 



Key to Species. 



1. Adult female brown 2 



Adult female black nigra 



2. Female strongly convex, nearly hemispherical, dark brown, with 



two transverse ridges and a median longitudinal ridge forming a 

 letter H ; derm thick with large closely-set pores ; caudo-lateral 

 margins of anal plates distinctly longer than cephalo-lateral 



margins oleae 



Female hemispherical, lighter in color, without ridges ; derm pores 

 slightly smaller and farther apart; caudo-lateral margins of anal 

 plates scarcely longer than cephalo-lateral hemisphaerica 



S. hemisphaerica Targioni-Tozzetti. Lecanium coffeae, filicum. 

 Hemispherical scale. (PL xiv, 3.) 



Studii sul Cocc, 26, 1867. 



Perhaps the commonest greenhouse species infesting nearly all 

 kinds of plants. It is of considerable economic importance, 

 occurring throughout the state. 



Hamden, Milford, New Haven, Shelton, Sterling, Suffield, Terryville, 

 Washington, Waterbury, West Goshen. 



S. nigra Nietner. depressa. Black scale. 



Enemies of Coffee Tree, 9, 1861. 



Occasionally occurring on greenhouse plants though not recorded 

 from the state. 



* Morrison considers that most of the records of this and the preceding 

 species from the eastern United States refer to L. corni. 



