152 I'll ill BEPOBT OF THE ENTOMOLOGICAL COMMISSION. 
the head and form the thoracic patch are bright tiiwiiv-hniwn, becoming darker 
towards the edges on the thorax. Ifetathoraeio and lateral hairs concolorous with 
posterior wings. Abdomen pale tawny, anal segment darker. Expanse, male and 
female, 1.85 Inches. (Grota and Robinson.) 
'210. Edtina ulbifron8 (Abbot and Smith). 
This is perhaps the most common iiotodontian caterpillar to be found 
on the oak. At first the caterpillars are gregarious, but after the tirst 
or second molt they begin to scatter over the tree. In Georgia, ac- 
cording to Smith and Abbot, the caterpillar "spun itself up in a thin 
white web between the leaves October 28, and came out on the wing 
the 18th of February. Others spun on the 29th of March, and came 
out on the 2d of May. The whole brood feeds together, especially when 
small." 
Mr. James Fletcher reports that in 1884 the caterpillars appeared in 
great numbers and were most injurious to both oaks and maples at 
Ottawa, Canada. (Rep., 32.) 
It is common on white oaks in Rhode Island and Maine late in August 
and through September ; those observed at Providence spinning a thin 
cocoon between the leaves early in October and until October 20-28. 
October 5 I found some small larva? (probably next to the last molt) 
with the stripes straw-yellow instead of orange. The moth appears in 
June in the Northern States. 
Larva. — Head large, orange-red, swollen, raised towards the apex ; wider than the 
thoracic segments, the body increasing in width towards the end, which has a large 
swollen orange-red hump on the eighth segment. The body smooth and shining, 
with no hairs ; a pair of broad subdorsal yellow lines 
inclosing five median black lines on a pale lilac ground. 
Below the yellow line are three black lines, with a 
second yellowish spiracular line. Anal legs pale or- 
ange-red ; all the legs pale orange. 
Pupa. — Of the usual form ; the cremaster is very 
characteristic ; it is flattened from above, deeply cleft, 
\J with tubercles from which arise three or four curved 
Fig. 52.— Edema albi/rons (from seta on each side. Length, 0.73 inch. 
Packard). Moth. — It is easily recognized by its whitish ash 
color, the square apex of the fore wings aud the broad 
white costal margin on the outer two-thirds of the wings; this white band 
sends a tooth backwards, bounding the upper and outer side of the discal brown 
ring, and there is an obtuse tooth between that and the apex : the inner 
brown line is curved and sinuous; there is a faint deeply-toothed outer line and a 
distinct narrow deeply-scalloped, rich, deep-brown marginal line, the scallop rilled 
in with whitish ash scales. Base of the wing inside of the middle line whitish ash ; 
hind wing and abdomen uniform ash-slate color; wings beneath of the same color; 
costal edge slightly bathed with whitish, with traces of a curved submargiual band, 
broadest on the costa and broken up behind. Expanse of the wings, 47 mm . 
While in Florida in April I collected at Crescent City on the live or water oak a 
fully grown caterpillar which I supposed to be Edema albi/rons. Bringing it to Provi- 
dence in a tin box, it spun a slight cocoon between the leaves late in April. Dot the 
moth did notemerge until September 30. Although the summer was a warm one. and- 
the room iu which it was kept had a warm exposure, the moth was evidently re- 
