BEUTENMULLER, MONOGRAPH OF THE SESIDME. 299 



Types : One female. Coll. T. W. Harris, Boston Soc. Nat. Hist. JEgeria cemula, male and 

 female. Coll. U. S. Nat. Mus. 



Larva. — " Head normal, lobes meeting in a point, paraclypeal pieces narrowed centrally and 

 rounded above, slight impressions centrally and toward apex ; pale brown, dark about the mouth, 

 epistoma colorless, a pale area above the paraclypeus, clypeal sutures dark. Body scarcely annu- 

 late, but the second annulet (tubercle ii) apparently the highest ; subventral folds distinct ; 

 spiracles small, brown ringed. Crochets 12 to 15 in a row, distinct, normal though fine and small on 

 account of the small size of the larva. Lower posterior ocellus pale, without pigment spot, but with 

 a weak lens. White, a dark vascular dorsal line centrally ; cervical shield membranous with brown 

 curved lines at the corners. Joint 13 normal, divided into two segments, the posterior one small." 

 (Dyar, MS.) 



Closely allied to Sesia pyri, but the legs are largely yellow ; the thorax has a 

 yellow stripe on each side ; the antennae lack the white patch and the female has 

 the fourth segment wholly yellow above and below. It lives in the larval stage 

 under the bark of oak, chestnut, and dogwood, and it also inhabits the oak-gall 

 (Andricus cornigerus). The dogwood {Cornus floridd) seems to be one of the 

 most favorite food plants. The larvae live under the bark on the sap wood and 

 produce burrows as shown on Plate XXXV, Fig. 5. The moth emerges in May 

 and June. It is also said to live on hickory and willow. 



Sesia ithacae Beuten. 



Plate XXXI, Fig. 22, Female. 



Sesia ithacce Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. IX, 1897, p. 215. 



Male. — Head black, palpi pale yellow beneath, black above and at the tip ; collar narrowly 

 yellow. Antennse black. Thorax black with a pale yellow patch on each side beneath. Legs 

 black, joints with pale dirty yellow rings ; fore coxae pale yellow. Abdomen and anal tuft black. 

 Fore wings transparent, borders and discal mark black ; basal area long ; outer area small, sub- 

 quadrate. Underside washed with yellow along the costa and inner margin. Hind wings trans- 

 parent with narrow black margin above and below. 



Female. — Black and yellow like the male, but the borders on the fore wings are considerably 

 broader, thus reducing the transparent area of the wings. Underside with yellow rays between the 

 veins on the outer part. Hind wings with margin also broader. Otherwise like the male. 



Expanse : Male, 15 mm.; female, 18 mm. 



Habitat. — New York (Ithaca). 



Types : Male and female. Coll. Am. Mus. Nat. Hist. 



Resembles Sesia pyri, but the margins of the wings and body are wholly 

 black. Life-history unknown. 



Sesia corusca (Hy. Edw.). 



Plate XXXI, Fig. 21, Female. 



s£geria corusca Hy. Edwards, Papilio, Vol. I, 188 1, p. 193 ; Grote, New Check List N. Am. 



Moths, 1882, p. 12. 

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



Vol. VIII, 1896, p. 140. 



