268 WILLIAM T. M. FORBES 



I have seen authentic material only from Missouri. It is doubtless general. 

 "New York" (BeutenmUller). 



19. G. maculimarginella Chambers. Closely similar to G. licostomaculelle. Head 

 usually more dominantly white; scutellum with a contrasting yellowish white 

 tuft; fore wing more crisply powdered, usually with postmedial line represented 

 by prominent white spots on costa and inner margin. The yellow on fore wings 

 more distinct. 13 mm. 



Caterpillar with head, feet, and cervical shield polished black; pro- and 

 mesothorax paler, white in front; abdomen with four purple stripes posteriorly on 

 segments, joining a purple transverse band in front. Two or more broods; on oak; 

 the first brood feeding in the buds, and emerging in May, the second between spun 

 leaves in June, emerging in July. 



Distribution general. New York: Buffalo (Wild), Ithaca. 



20. G. vernella Murtfeldt. Violet-gray, more or less dusted with blackish; each 

 scale of ground violet with black tip. Palpus with second segment yellowish with 

 a strong yellow brush, and third blackish, contrasting. Thorax with small yellow 

 posterior tufts. Fore wing with a strong black antemedial patch over cell and 

 fold, with yellow dots before and beyond it, connected by an oblique black bar to 

 costa. Outer part of wing blackish, with contrasting but diffuse white postmedial 

 costal and dorsal spots; extreme margin and fringe powdery gray like base. First 

 dorsal dot black, more intense than the patch in which it lies. No tufts. Hind 

 wing paler, with a weak pencil near inner margin. Easily distinguished from the 

 other species of this group by the yellow palpus. R and M, of hind wing separate. 

 15 mm. (formosella Murtfeldt, not Htibner). 



Larva on laurel oak, in May, rolling the leaves. Head and cervical shield 

 black; body gray with six or eight purplish stripes; meso- and metathorax choco- 

 late, their anterior two-fifths white. Pupa in a folded leaf. Moth in July. 



This species is perhaps nearest G. gilvomaculella, which has been confused with 

 it. It has been bred in New Jersey and Missouri and emerges in June. 



New York: Ithaca. 



21. G. dyariella Busck. Palpus jet black on outer side. Fore wing fuscous, 

 somewhat mottled; head and thorax concolorous. Fore wing marked with black as 

 follows: a dot or small streak on base of R and of A, a noticeably irregular, black 

 bar running obliquely out from costa a fourth way out, to fold, connecting with 

 the orbicular and claviform dots, which form extensions of its distal side, a black 

 bar at end of cell, connected to a vertical bar 'resting on the anal angle, and black 

 dots in cell before this. A fuscous subterminal fascia. Hind wing paler toward 

 base. 18 mm. 



June; larva on poplar. 



Western Pennsylvania to Colorado. 



23." G. nigrimaculella Busck (Chambers ms.). Fuscous, sprinkled with dark 

 brown, black, and whitish; palpi with a well developed brush; head and thorax 

 largely brown, the face not pale. Fore wing with costal edge black, whitish below; 

 two short oblique dashes on disc; large black costal and dorsal spots at beginning 

 of fringe, with an obscure pale angulate fascia beyond. Abdomen white in middle 

 below. 13 mm. 



July to August. Closely similar to G. vernella; most easily distinguished by 

 the dark face. 



Southern Massachusetts to western Pennsylvania. New York: Ithaca. 



24. G. gilvomaculella Clemens. Ground fuscous, somewhat bluish, and a little 

 powdery, but less than in G. nigrimaculella. Head concolorous; face pale below; 

 second segment of palpus with large brush, blackish, lightly dusted with pale 

 yellow; third slender and mostly black. Fore wing somewhat shaded with yel- 

 lowish, especially on costa; the costa with broad obscure blackish bars, and a pale 



19 Number 22 is vacant. 



