285 



Adela singulella Wlsm. 



This species differs from sulzella Schiff. in its smaller size, narrower fascia, and in 

 having the antennae of the female similar to those of the male instead of being thick- 

 ened to the middle. It has a single narrow fascia on a plain bronzy ground. 



Adela septentrionella Wlsm. 



This species belongs to the group of which the heads of the male are black and of 

 the female yellowish. It has much the appearance of trigrapha Z., in the male sex 

 only, but is smaller, and possesses no third transverse fascia, this being indicated 

 only by a costal spot; moreover the eyes of the male are set much wider apart than 

 in trigrajiha, and in this respecjb approaches the genus Xemotois Hb. It may be de- 

 sirable to recognize this genus as occurring in North America, but I prefer to leave 

 this point until the publication of a finally revised index. 



Adela purpurea Wlk. 

 = biviella Z. 



This very distinct species with its broad post-median white fascia on a bronzy 

 ground, followed by a less conspicuous ante-apical transverse streak, appears to 

 occur only in the northernmost parts of the United States. It is abundantly distinct 

 from all other species. 



Adela ridingsella Clem. 



= Dicte corrusci/asciella Chamb. 

 = Adela schlwgeri Z. 



This species is quite distinct from all European forms, from which the group of 

 black scales and metallic spots at the anal angle at once separate it. It has much 

 the coloration of a Glyphipteryx. 



Adela beila Chamb. 

 = chalybeis Z. 

 = iochroa Z. 



The original description of bella Chamb. refers to a "dull brown purple, violaceous, 

 or golden," species (not green) with indistinct dark-margined fasciae near the apex. 

 The antennae of the female are described as having the basal half dark purple, but it 

 is not recorded that they are thickened at the base with long scales. This agrees in the 

 main with Zeller's description of chalybeis, of which the antennas are four times the 

 length of the body. Zeller's type of iochroa in Dr. Staudinger's collection agrees with 

 specimens in my own collection which are not green, but purplish, and have antennae 

 of the length described. I can find no difference between this and the description of 

 chalybeis sufficient to separate them. In my own collection are specimens of a bril- 

 liant green Adela, from Louisiana, with thickened antennas in the female and with in- 

 distinct transverse lines (scarcely fascise), such as described by Chambers in his sec- 

 ond notice of bella (Can. Ent., IX, 207, and XI, 125), where I think he may have had 

 this undescribed species before him and not bella. It seems to require a detailed de- 

 scription and a name. 



Adela aeruginosella sp. n. 



Antenna?, male, with the basal third tinged with purplish-fuscous, the apical two- 

 thirds white, length 22 mm , the basal joint enlarged; female, 10-ll m ' n in length, 

 with the basal half thickly clothed with deep purple scales. 



Palpi, ferruginous, much mottled with fuscous. 



Head, male and female, covered with long ferruginous scales ; face purplish-fuscous. 



Fore- icings, shining metallic green, deep purplish towards the apex, with a golden 

 tinge along the base of the greenish-purple cilia ; on the purple apical portion of 

 the wing are some ill-deHned transverse streaks of metallic green, correspond- 

 ing with the main color of the wing, not dark-margined nor strictly fasciafornu 



