572 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



the third line on the fore wing is deeply but quite regularly sinuate, and near the 

 <;osta acutely dentate. It varies a good deal, especially in the tint of the brown shade 

 •accompanying the third liue. Expanse of wings, 1.40 to 1.55 inches. 



32. TllK PINK-STRIPED WILLOW SPAN-WORM. 



Deilinia variolai'ia Guen. 

 (Larva, Plate v, fig. 6.) 



The caterpillar of this pretty moth is one of the commonest inch 

 worms to be found on the willow. 



The genus to which this caterpillar belongs was founded by Huebner 

 for a moth referred by Guenee to Gabera. The species of Deilinia are 

 <listingui8hed from those of Gorycia bj^ the pectinated antennje, the two 

 €ommou lines, and the generally ocherous tint, though the females of 

 D. variolaria are with diflQculty separated from those of Gorycia. From 

 AcidaUa the species differ in having pectinated antennae, in the want of 

 a decided band on the hind wing, and in the larger palpi. The species 

 is figured on PI. 10, fig. 26, of Packard's Monograph of Geometrid 

 Moths. 



The caterpillar occurred August 10 on the willow at Brunswick, Me. 

 It pupated August 14, and the moth emerged from May 20 till June 6. 

 The moths are seen flying among willows in June and July. We have 

 also found the larvae July 24, and from that date till the first week in 

 September. 



Larva. — Body smooth, cylindrical. Head as wide as the body, flattened from 

 above, especially in front ; anteunaj pinkish. Green with a pinkish tinge; on the 

 side of the head a lateral distinct deep pink line, sutures and upper side of the seg- 

 ments pinkish. There are eight dorsal median spots along the abdominal segments, 

 a central dark brown dot flanked on each side by a pale lilac patch. First pair of 

 abdominal feet deep lilac; anal legs with a vertical anterior lilac line. Supra-anal 

 plate large, triangular, with two minute tubercles. Length, 22™™. 



Pupa. — Thorax moderately stout, at first greenish, finally becoming like the abdo- 

 men, mahogany-brown ; terminal spine (cremaster) rather stout and blunt, ending 

 suddenly in two large curved bristles with three minute slender much curved ones on 

 each side ; the basal pair situated about half-way between the base and the middle of 

 the spine. Length, 10™™. 



Moth. — Front of head deep reddish-ocherous ; white on the front edge ; palpi deep 

 ocherous; antennae white. Fore wings with the costal edge rather full. Both wings 

 strigated more or less thickly with brown ; sometimes the wings are pure white. In 

 the male, the strigie (or short lines) are arranged in two parallel lines on both wings. 

 Beneath, pure white, sometimes a complete black discal dot on each wing. Fore and 

 middle legs ocherous. Expanse of wings, 26™™. This species diflfers from D. erythe- 

 maria (Guen.), also common in the Atlantic States, by its white wings, which are 

 often without lines, and by the deep reddish-ocherous front of the head. 



33. Hydria undulata (Linn.) 



(Larva, PI. v, fig. 9.) 



The larvae were found on the willow at Brunswick, August 5, and for 

 the colored figures on PI. v I am indebted to Mr. H. H. Wilder. The 

 moth issued May 19, but as the specimen flew away before I pinned it, 



