No. 34-] HEMIPTERA OF CONNECTICUT: COCCIDAE. 357 



T. liriodendri Gmelin. Lecanium tidipiferae Cook. Eulecanium 

 tulipiferae. Tulip-tree scale. (PL xiv, 2.) 



Syst. Nat., Edn. 13, 2220, 1789. 



This is our largest scale insect, often nearly one-third of an inch 

 in diameter. It occurs on the lower branches of the tulip-tree 

 Liriodendron tulipifcra, and also on linden and magnolia. 



Found throughout the state. Our records are from Berlin, Branford, 

 Bridgeport, Bristol, Brookfield, Collinsville, Columbia, Danbury, Deep 

 River, East Hartford, Fairfield, Glastonbury, Greens Farms, Greenwich, 

 Hamden, Hartford, Killingworth, Lyme, Middletown, Naugatuck, New 

 Canaan, New Britain, New Haven, New London, Newtown, Norwalk, 

 Norwich, Plantsville, Pomfret, Rockville, Ridgefield, Rowayton, Southing- 

 ton, Southport, South Windsor, Springdale, Stamford, Stratford, Suffield, 

 Talcottville, Waterbury, Waterford, West Haven, Wilton, Woodbury and 

 Woodbridge. 



A closely allied species, usually listed as Neolecanium cornu- 

 parvum Thro, occurs on magnolia and may be found in Connecti- 

 cut. Apparently Dietz and Morrison* consider this species con- 

 generic with Toumeyella liriodendri. It may be distinguished 

 from liriodendri by its more elongate and less convex shape. 



Lecanium Burmeister. 



Eulecanium Cockerel!. 



Commonly known as soft scales, usually brown, oval to circular, 

 convex ; anal ring with eight hairs ; legs and antennae fairly well 

 developed; except in one species {nigrofasciatum) the middle 

 spiracular spine is not twice as long as the outer two. 



Key to Species. 



1. Female dorsum without appendages; middle spiracular spine not 



twice as long as the outer ones 2 



Female dorsum with a row of about thirty minute conical appen- 

 dages extending forward from the anal cleft; derm pores not 

 grouped; middle spiracular spine more than twice the length of 

 the outer two nigrofasciatum 



2. Anal plates at least half as wide as long 3 



Anal plates less than half as wide as long caryae 



3. Smallest spiracular spine not twice the average length of a mar- 



ginal spine ; derm pores more or less definitely grouped 4 



Smallest spiracular spine at least twice the average length of a 

 marginal spine; derm pores not grouped, scattered; strongly 

 convex, sometimes nearly globular ; on oak quercif ex 



4. Derm pores arranged in rows radiating from the center of the 



body 5 



Derm pores not arranged in rows radiating from the center of the 

 body 6 



5. Derm pores large, and arranged in single rows radiating from the 



center of the body; surface fairly smooth, not roughened or 

 wrinkled ; occurring only on Arbor-vitae fletcheri 



* The Coccidae or Scale Insects of Indiana, office of the State Entomolo- 

 gist, Indianapolis, Ind., April, 1916. 



