56 



and grayish fuscous. Hind wings cinereous; fringes whitish 

 mixed with gray. 



Habitat. Southern Oregon. Food, Artemisia. 



PTEROPHORUS INQUINATUS. 



(Edematophorus inquinatus Zell., Beitr., p. 125 (1873). 

 (Edematophorus ambrosice Murtf., Am. Ent., Vol. Ill , 

 p. 236 (1880). 



Expanse of wings, 19 mm. Head and thorax gray, spotted with 

 white ; palpi small, porrect, acute, whitish, touched with brown 

 outwardly. Antennae whitish, spotted with brownish, white at the 

 base on the under side. Abdomen gray. 



Fore wings dust gray, thickly dusted with white and brown 

 scales forming scattered flecks or blotches, one of which is gen- 

 erally present on the middle of the space between the base of the 

 wing and the fissure ; a larger one before the fissure and separated 

 from it by a whitish space, against which its oblique outer margin 

 is excavated ; below this is a longitudinal streak of scales, bor- 

 dered basally by a white spot and separated from the spot before 

 the fissure by a whitish space. Two blackish streaks or spots oc- 

 cur on the costa, the larger one above the base of fissure, the other 

 half-way between it and the apex of the wing. Fringes grayish, 

 cut with white under the apices of the lobes and on the anal 

 angles, where there is a white wisp. A similar wisp before the 

 apex and on the anal angle of the second lobe. A brown dot 

 sometimes rests on the base of each of the three wisps. Hind 

 wings brownish gray, a diffuse brown dot on the apex of each 

 feather or at least on the first. Fringes brighter. 



Habitat. Alabama, Texas, Missouri, Colorado, Arizona. Food, 

 Rag- weed (Ambrosia artemisicefoUa) . 



"Larva Length, 0.35; diameter, 0.09. Form depressed. 

 Color, pale greenish gray, with very characteristic dark markings 

 and lateral tufts of long, white silken hairs. Head small, light 

 brown, corneous, retractile. Segment 1 with a dilated, partially 

 free shield-like collar, covering top and projecting over the head. 

 The ornamentation of this collar consists of five central minute 

 brown dots, with four still smaller black ones on each side, from 

 each of which proceeds a short curving bristle. The project- 

 ing edges fringed with soft light hairs. Segments 2 and 3 

 gradually broadening backward, ornamented on dorsum with two 

 oblong, pale brown spots on either side of a triangle of very 

 minute black dots, and having a larger black dot on each outer 



