130 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



the bright sunshine of July and August-, and may be found especially 

 in the afternoon fluttering about the food-plant of the larva, the fragrant 

 Abronia (A.fragrans), the leaves of which are mined by the larva-. A 

 more detailed account of it is given in the Canadian Entomologist. 



Argyresthia montetta n. sp. — Face and palpi yellowish ; tuft and tho- 

 rax white; antenna- fuscous, annulate with white; fore wings fuscous, 

 the apical portion indistinctly dusted with white, and with indistinct 

 short, white, costal streaks before the apex, each dark-margined before ; 

 the dorsal margin is white as far as the fold, and very faintly dusted : no 

 dorsal fuscous streak ; there is a row of fuscous scales around the base of 

 the cilia, which at the apex have to the naked eye the appearance of a 

 minute spot. Hind wings, cilia, and upper surface of tin 1 abdomen pale 

 grayish ; under surface of the wings grayish-fuscous, and tuft whitish ; 

 legs whitish, the tarsi stained with yellowish. Expanse of wings. 7 

 lines. Among scrub-oaks at Edgerton in July. 



A. querdcolella n. sp. — Palpi, head, thorax, and antennae white, the 

 antennae dusted with brown. Fore wings pale saffron-yellow (in some 

 lights pale golden), with the basal fourth of the dorsal margin white, 

 terminating in an oblique white dorsal streak, which crosses the fold ; 

 there is also a basal vhite streak, which extends along the fold to the 

 dorsal oblique streak, so that with the white of the dorsal margin it 

 incloses a basal streak of the pale saffron hue between the fold and the 

 dorsal margin ; the oblique dorsal streak is dark-margined both before 

 and behind. The basal white streak along the margin is sometimes faintly 

 dark margined internally, and the one along the fold is sometimes dark - 

 margined on both sides. Behind the middle of the wing is an oblique, 

 white fascia, which is nearest to the base on the dorsal margin, and 

 is dark- margined both before and behind; the space before it as far 

 as the dorsal oblique streak is suffused with fuscous, and the costal half 

 of the fascia is sometimes dusted with fuscous. The apical part of the 

 wing is rather densely dusted with fuscous, and has two small white 

 costal spots, and a dorsal one placed opposite to the first of the two, 

 giving the appearance of a fascia, the middle of which is dusted with 

 fuscous. Sometimes all these spots are small and inconspicuous, and 

 the apical half of the wing is dusted with white and fuscous intermixed. 

 Cilia pale fuscous, with the tips ami a hinder marginal line at the base 

 dark brown. Hind wings pale fuscous ; both fore and hind wings dark 

 fuscous beneath. Under surface of the body white ; legs yellowish- 

 white ; upper surface of abdomen pale fuscous, with a bluish tinge. 

 Expanse of wings, 5 lines. 



The neuratiou of the hind wings is like that of A. nitidella, as figured 

 in Ins. Brit. vol. iii ; the fore wings have the apical vein furcate, as in 

 A. arcenthina (loc. cit), but have five instead of four veins beneath it. 

 Edgerton, in June, among scrub-oak. ' 



A. altissimella n. sp. — Of a leaden hue, except that the vertex is whit- 



