ANNETTE F. BRAUN 
199 
Locality. — P'alls ('hiirch, ^’il■ginia (Snyder, Heinrich, Busck). 
“The larva * * * lives in the lower layer of the bark of 
chestnut just al)ove and encroachinfi' upon the eanil)iuin; the 
mine is a slender serpentine, a few millimeters broad a’ld several 
inehes long, often doubling u])on itself and broadening out to 
twice or more in width in early spring, when the larva reaches 
maturity; in April and early May the full-grown larva leaves 
the bark and falls to the ground where it makes a closely woven, 
I’eddish brown cocoon amongst the rubbish, often boring down a 
few inches in the loose surface soil to find a suital)le moist place 
on the underside of an old leaf or twig. The cocoon is oval, 
flattened, about 2 by 3 millimeters in diameter and 1.5 milli- 
meters thick.” The imagoes emerge during September of the 
same year. 
This insect has been regarded as an important factor in the 
spread of the chestnut bark disease. 
The species is distinguished from its allies by the almost uni- 
form dark bluish fuscous color of the basal half of the fore wings, 
and the pale head. 
4. Ectoedemia heinrichi Busck 
Ectoedeynia heinrichi Busck, Proc. Ent. Soc. Wash., xvi, 149, 1914. 
Palpi pale ocherous, face and head black; antennae dark fuscous with nar- 
row pale annulations; ej'e-caps creamy-white. Thorax pale ocherous, more 
or less dusted with blackish scales. Fore wings pale ocherous, denselj' dusted 
with blackish fuscous scales which tend to form patches, leaving usually the 
extreme base of the wing, except along the costa, and two poorly defined trans- 
verse fascia, one at the basal third, the other at the apical third, on which the 
dark dusting is absent or scattered. The second fascia is the less distinct and 
is sometimes almost obliterated by scattered dusting. Cilia pale ocherous, 
with a row of dark-tipped scales around the base. Hind wings and cilia 
fuscous; male with the costa excised from the middle and with a yellowish 
hair-pencil at base of costa. Legs ocherous. Abdomen yellowish fuscous 
above, pale ocherous beneath. 
Expanse . — 9 to 10 mm. 
Localities . — Virginia (Heinrich); Ohio; Kentucky. 
The larva forms a characteristic oval spiral mine in the bark 
of young branches of pin oak (Quercus pahistris), well illustrated 
by Mr. Busck in a photograph accompanying the original 
description. The mine is a narrow linear track, closely coiled 
in a flattened oval spiral, resembling a watch spring; the empty 
egg shell often remains attached to the bark in the center of the 
TU.\NS. AM. EXT. SOC., XLIII. 
