CLEAR-WING MOTHS OF FAMILY AEGEKIIDAE 119 



and 3 with yellow scales mixed with the darker scales on the underside; 

 the anal tuft fan-shaped, rarely expanded, black above, yellow beneath 

 and at the sides. Coxa, trochanter, and femur pale yellow ; tibia yellow 

 beneath, broadly banded with blue-black above, tarsus yellow beneath, 

 black above, narrowly ringed with yellow at the joints. Forewing trans- 

 parent, veins, narrow border, and oblong discal mark black ; outer margin 

 broad, dull cupreous between the veins ; underside golden yellow at the 

 outer margin and along the veins. Hindwing transparent, discal mark 

 faint; border narrow, black; cilia dull black. Genitalia with sacculus 

 spined in a straight line curved at the tip. 



Female. — Antennae clear pale yellow on the outside for nearly half 

 their length. Abdomen with segment 4 more broadly banded with yellow 

 above than in the male, on underside the band broadening over the whole 

 segment, connecting with segment 5, which also is yellow beneath; seg- 

 ments 1 and 2 striped with yellow at the sides, the stripe continuing in 

 a thin band posteriorly on dorsum of segment 2 ; anal tuft short and 

 blunt, black with yellow edges. 



Expanse: Male 15 to 18 mm., female 16 to 20 mm. 



Distribution. — Canada to Mississippi. Western records doubtful. 



Types. — Male. In the Boston Society of Natural History. The type 

 of Aegeria koehelei, a male, is in the American Museum of Natural 

 History. A specimen in the United States National Museum labeled 

 "Aegeria koehelei Hy. Edwards, male, type, Arizona," is a female and 

 not pyri. There are no records of pyri from Arizona. The specimen is 

 in very poor condition. 



Rejfiarks. — T. pyri and scitula are easily confused when not in good 

 condition or if discolored by grease. The outstanding dififerences are 

 as follows : pyri with thorax wholly black above, tibiae black, tufted 

 with yellow at the spurs, tarsi black, narrowly banded with yellow at 

 the joints, antennae of the female well marked with white before the 

 tips ; scitula with antennae black in both sexes, thorax with a yellow stripe 

 on the patagia, tibiae yellow, black between the spurs, tarsi yellow. 



As a bark borer on apple, pyri has received considerable attention 

 from orchardists and economic entomologists. Healthy, well-cared-for 

 trees, however, are fairly immune to attack. Trees suffering from neglect, 

 injured by storms, and weakened by disease are subjected to heavy in- 

 festations, the borer hastening the decline of the tree. Aside from apple, 

 hawthorn {Crataegus) is another food plant, presumably the original 

 one. The borer also has been reported from mountain-ash (Sorhiis) and 

 from Juneberry (Anielenchier) , but there are no records from pear. The 

 larvae live in shallow, tortuous channels in and beneath the bark, which 

 they cause to blister and peel. The moths emerge from late in May 

 to July. 



