56 THE CANADIAN ENTOMOLOGIST 



bright yellow-orange dorsally. Body shaded with black in supraspiracular 

 area and with the orange-yellow subspiracular line of previous stages 

 well marked. Lateral black hair-pencils from prothoracic warts; dorsal 

 black pencil from abdominal segment VIII. Well developed tufts dorsally 

 on abdominal segments I-I\', the anterior two light brown, often shading 

 into deeper brown apically and frequently edged laterally with white plumed 

 hairs; the two posterior tufts smaller, generally composed of white plumed hairs; 

 tuft 3, however, often considerably tinged with light brown; in such cases 

 tufts 1 and 2 are generally smoky brown ; abdominal verrucae bright yellow- 

 orange, edged at base by creamy line except verruca II of abdominal segments 

 I-IV which is black. Long black hairs from verrucae few in number; numerous 

 shorter hairs white. Eversible glands bright coral-red. Legs yellow-orange; 

 venter pale yellow-gray. 



Amount of dark suffusion on body variable, the 9 caterpillar being lighter in 

 colour than cf . 



Stage V. — Head black, with white clypeus; general ground color of body 

 grayish caused by white suffusion on black ground with thoracic dorsal portion 

 yellow with black centro-dorsal line; dorsum between tufts broadly black; on 

 other abdominal segments narrowly black, in 9 tinged with brown; dorsal 

 tufts white at base, tipped broadly with light or dark chestnut-brown; black 

 lateral anterior pencils as before; dorsal black pencil on abdominal segment VIII 

 preceeded by a brown recurved tuft half the length of the black pencil; a distinct 

 subspiracular orange line; verrucae bright coral-red, shaded with black at base, 

 ringed by whitish. 



The 9 larvae were noticeably larger than the cf 's but I was unable to dis- 

 cover that they underwent an extra moult as is generally the case in this group. 



Imago cf . — Colour dark chocolate-brown with none of the chestnut-brown 

 shades of allied species except traces around the reniform. Considerable sprink- 

 ling of white scales rather evenly distributed over the whole wing, more especially 

 noticeable in the apical and median areas. Usual lines well-defined and not 

 perceptibly different in course from those of allied species; reniform more or less 

 white-filled. Beyond the t. p. line on costa a prominent rectangular dark patch, 

 surrounded by whitish scaling, giving rise to the irregular dark s. t. line which 

 is more or less defined by white scaling and terminates in a small white patch 

 above anal angle. In normally marked specimens this s. t. line is connected with 

 the dark marginal line by a distinct dark dash through the interspace of veins 

 6 and 7. Secondaries dark chestnut-brown with a broad, darker brown marginal 

 border of varying intensity. Expanse 27-30 mm. 



9. Wing-stumps and anterior half of -abdomen smoky-gray, the posterior 

 abdominal segments tufted with thick hairs of a blackish colour, much darker 

 than the color found in allied species. 



Holotype 1 cf, Chase, B. C, bred at Ottawa, 1920, and in Canadian National 

 Collection. 



Allotype 1 9 , Chase, B. C, bred at Ottawa, 1920, and in National Collection. 



Paratypes 4 cf 's, 2 9 's, from same locality in the National Collection and in 

 the Barnes Collection, Decatur, Illinois. 



The dark tufting in the 9 and the dark ground colour of primaries of cf 

 together with the dark subterminal dash in interspace 6 seem to be characteristic 

 of the species. 



