472 NEW YORK STATE MUSEUM 



Aegeria tibialis Harris 



A large brown, yellow-marked clearwing moth having a wing spread of 1^ inches 

 lives as a larva in willow and poplar trunks. 



This species occurs in Canada, the New England States, New York, 



British Columbia, Vancouver, Colorado and California, and attacks the 



trunks of willow and poplar. 



Male. Head black, orbits and top lemon yellow, as are also the palpi. 

 Antennae jet-black. Thorax deep brown black, with a very narrow yellow 

 line on each side forming a yellow spot behind and meeting a rather broad 

 curve'd line on each side in front. Sometimes the two lines on top are very 

 indistinct or almost absent. The lateral line connects with the yellow spot 

 on the base of the fore wings ; sometimes the line is broken below the 

 middle. Posterior edge of thorax with black hairs, broadly edged with 

 yellow. Abdomen with first segment black, more or less narrowly edged 

 with yellow behind, second segment wholly black, third segment yellow, 

 narrowly edged with yellow behind, fourth segment wholly brown black, 

 remaining segments brown black, with very narrow yellow bands behind, or 

 yellow with very narrow brown black bands behind. Anal tuft brown 

 black mixed with yellow. Underside of abdomen brown black with yellow 

 bands. Legs yellow, washed with brown. Fore wings transparent with 

 the margins, veins and discal mark orange brown or deep brown black. 

 Hind wings with the borders very narrow, orange brown or brown black. 



Female. More robust than the male, with the markings of head, 

 thorax, and wings similar, but as a rule a little more pronounced. 

 Abdomen with the first, second, third and fourth segments as in the male ; 

 last three sometimes almost entirely golden yellow, with the tip washed 

 with brown ; the fifth and sixth segments are half yellow and brown. 

 Underside yellow, with narrow brown, black bands, except the last or last 

 two segments, which are wholly yellow. 



Expanse, male 30-32 mm ; female 35-40 mm. Bcutenmuller 



Aegeria apiformis Clerck 



A large brown, yellow-marked clearwing moth having a wing spread of 1^ inches 

 lives as a larva in roots of willow and poplar. 



This European species is relatively rare in this country although it has 

 been recorded as far west as Nevada. It attacks the roots and trunk of 

 willows and poplars, requiring two years to attain maturity. The adult is. 

 very sluggish in habit and readily captured. 



