296 BEUTENMULLER, MONOGRAPH OF THE SESIID^E. 



causing the trunks to become unsightly (Plate XXXVI, Fig. 2), in many 

 cases killing young trees. When once the larvae obtain an entrance into 

 the tree it is very difficult to detect them, and they will then carry on their de- 

 structive work all through the summer and in early spring the following year. 

 The moths emerge about the middle of May to about the middle of June. Ac- 

 cording to Mr. Hulst the eggs are probably laid at night. The moths emerge 

 soon after sunrise and are on the wing a few minutes after emerging from the 

 pupae. 



Sesia corni (Hy. Edw.). 



Plate XXXI, Fig. 17, Female. 



vFgeria corni Hy. Edwards, Papilio, Vol. I, 1881, p. 190 ; Grote, New Check List N. Am. Moths, 

 1882, p. 173 ; Kellicott, Can. Ent. Vol. XXIV, 1892, pp. 46 and 210; Insect Life, Vol. 

 V, 1892, p. 83 ; Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. IV, 1892, p. 173. 



Sesia corni Smith, List Lepid. N. Am. 1891, p. 20 ; Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. 

 VIII, 1896, p. 138 ; ibid. Vol. IX, 1897, p. 220. 



Male. — Head black ; palpi orange, orbits white ; collar dull orange. Antennae black. Thorax 

 deep purplish black with a very narrow stripe on each side ; pale orange beneath. Abdomen 

 slender, deep purplish or blue black with a very narrow ring on the second and last three seg- 

 ments ; underside pale yellow. Anal tuft black above, bright red beneath. Legs bluish or purplish 

 black, tibiae and tarsi banded with pale yellow ; anterior coxae yellow. P'ore wings transparent 

 with borders purplish or bluish black ; inner margin very narrow ; outer margin rather broad. 

 Discal mark large, black. Underside same as above or washed with pale yellow. Hind wings 

 transparent with very narrow margins. Discal mark small. Underside same as the upper. 



Female.— Like the male, except the anal tuft, which is wholly red, and the antennae have a large 

 white patch on one side before the tip. 



Expanse : Male and female, 18-21 mm. 



Habitat. — Massachusetts, New York, Pennsylvania, Ohio. 



Types : Two males. Coll. Hy. Edwards, Am. Mus. Nat Hist. 



Allied to Sesia acerni, but considerably darker, and lacking the yellow color 

 on the wings and body. According to Kellicott it infests the branches of the 

 maple. The larva lives in branches ranging from mere twigs to those an inch or 

 two in diameter. These are often enlarged at several points into rough barked 

 or gnarled excrescences. The swellings are often nearly globular, more often, 

 however, oblong and frequently there are openings into the centre of the stems. 

 Inside the branches are mined in various directions ; this often causing them to 

 die or become weakened. There may be one or more larvae in a single excres- 

 cence. The moths issue from about the middle of May to the middle of July. 



Sesia aureopurpurea {Hy. Edw.). 



Plate XXXII, Fig. 33, Male; Plate XXXIII, Fig. 7, Female (?) 



sEgeria? aureopurpurea Hy. Edwards, Bull. Brooklyn Ent. Soc. Vol. Ill, 1880, p. 72. 

 jFgeria aureopurpurea Beutenmuller, Bull. Mus. Nat. Hist. Vol. IV, 1892, p. 174. 

 Carmenta aureopurpurea Grote, New Check List N. Am. Moths, 1882, p. 12. 



