]^38 THE CANADIAN ENTOMOLOGIST 



ation) with little sexual disparity and set in a tuftinc^ of wliitish scales. 

 Thoracic vestitnre yellow overlaid by longer, purjjle-brown scales, the prominent 

 anterior tuft has the long purple scales predominant, the yellow standing out 

 strongly on the tegulae and dorsal area, here margined with purple. 



Primary proportionately broad, of the typical maculation ; tlie chrome 

 yellow ground color is overlaid anj much obscured with purple-or reddisa- 

 brown powderings, deepest on the veins and productive of a rather tawny effect. 

 At the extreme base a dot of yellow or whitish scales, the basal spot is yellow, 

 the basal line double, from which outwardly a yellow dot appears on the median 

 vein; the basal area remaining appears as an irregular inirplish band, bounded 

 outwardly by the sinuous, double, antemedial line ; the median field is evenly and 

 entirely of one shade of yellow, upon which the powderings appear more dense 

 in individual cases ; the median shade line is prominently drawn in brown, angles 

 at the lower corner of reniform and has a course thence straight to the inner 

 margin, with a tendency to be denticulate between the veins. The orbicular 

 is a rounded white spot, dotted or cut centrally with a few yellow scales ; the 

 claviform is composed of two smaller spots, with the u])per minute and either 

 white or stained with yellow, and the lower one pure white. The reniform is 

 the usual combination of broken spots, mostly yellow but with some white ap- 

 pearing in varying degree. The post-medial line is double, excurved past the 

 reniform, thence nearly straight to inner margin. Sub-terminal area glistening 

 purplish, defined from the terminal space by the very denticulate sub-terminal 

 line, and the latter area more yellowish especially at the apex where the bright 

 yellow ground again shows. Fringes are lustrous purple-brown. 



Secondary is of a much paler yellow, more or less suffused with a rosy 

 flush, a faint median line and sub-terminal banding appearing in darker tone ; 

 the fringes paler than primary. The undersides of all wings are of similar liue 

 to the secondary, a median line appears and stipplings of purple-brown arc den- 

 sest on costal margins. The abdomen is of same colour as secondaries, the 

 usual tuftings appearing. Normal expanse, 38 to 45 mm. 



The genitalic structures of the male conform to the conventional pattern, 

 being similar to marginidens and others in detail. The trigonate, spinose area 

 of the cost has the lower angle produced into a long point (called the pollex 

 by Pierce) and this exceeds the curved, thorn-like har]K\ which has the usual 

 array of fine teeth posteriorly. 



Five males and three females are under examination ; one male type and 

 One dwarfed example not fully typical. Emergence for the series, Sept. 24 to 

 30, 1920. 



Type locality, Sussex County. Delaware. 



The larval habit evidently conforms to the usual happenings in the genus ; 

 the hybernated egg doubtless gives up its larva the latter part of May, the 

 growth proceeding as with allied species. 



LarvOf. Penultimate stage : Belong to that section of the genus where the 

 first four abdominal segments appear as a dark girdle, with the continuous dor- 

 sal and sub-dorsal lines broad and well defined in yellowish white, excpt where 

 the latter are broken at the girdle, this species might be well selected as typifying 

 what Papaipema attains in its best showing of tubercle arrangement and the 

 attributes of its congeners. 



