42 WILLIAM G. DIETZ, M. D. 



B. acerifoliella Fitcli. — PI. V, fig. 4.— Dyar'sList, p. 569, No. 6476.— Head 

 russet-yellow. Palpi fuscous. Antennae blackish brown, pecten of first joint 

 russet. Thorax dark brown, with golden green and bluish scales. Abdomen 

 bronzed brown. Forewings dark fuscous, overlaid with deep, bluish purple 

 scales; scattered over the disk and along the apical veins are some bright green, 

 hair-like scales; both margins narrowly edged with golden. Cilia fuscous, 

 sprinkled with bluish scales; underside fuscous brown, with purple reflection. 

 Hindwings pale grayish fuscous, with a feeble, purple lustre, margin narrowly 

 edged with pale metallic scales. Cilia pale fuscous; underside similar to upper. 

 Underside of body dark fuscous, with some silver-white scales. Legs grayish, 

 tinged with dark fuscous, basal half of tarsal joints paler. 



Exp. 11.5-13.5 mm.; 0.36-0.54 inch. 



Hab. — Atlantic States; British Columbia (Kaslo). 



I took two specimens (males) flying low at dusk, May 22, 1897. 



The following species greatly resembles the preceding in general 

 habitus, and for this reason alone shall place it here provisionally. 

 Generically it differs from Breckenridgia by the forewings with all 

 veins present, free, 2, 3 and 4 parallel but reaching the dorsal mar 

 gin at an acute angle ; apex more obtusely pointed and the dorsal 

 margin more strongly curved towards the apex. Hindwings less 

 pointed at apex. The antennae are robust, somewhat flattened and 

 finely pubescent ( <? ) ; hindwings as wide as forewings, veins 5-6 

 short stemmed ; scales hair like. Mouth parts and vestiture of head 

 too mutilated to give an accurate description. 



B. ? clirysurella n. sp. — Head, antennae, thorax and anterior half of 

 abdomen dark blackish brown. Wings uniformly coffee-brown, with scarcely 

 a lustre. Cilia concolorous. Underside same as above. The last four abdominal 

 segments, above and beneath, as well as the sexual armature, thickly clothed 

 with coarse fulvous pubescence. Anterior and middle legs fuscous brown, poste- 

 rior yellow; tarsal joints banded with brown. 



Exp. 15.0 mm. ; 0.6 inch. 



Hab. — Colorado. 



A male specimen in my collection. The conspicuous deep yellow, 

 pubescens forms a strong contrast to the otherwise sombre appear- 

 ance of the insect. 



ISOC'ORYPH.4 gen. n. 



Type mediostriatella. 



Head strongly roughened. Labial palpi moderate, second joint 

 with lateral setse, terminal pointed. Maxillary palpi plicate. An- 

 tenna.' rather thick and as long as the forewings, simple in both 

 sexes. Forewings elongate, pointed ; 12 veins, 7 and 8 short stem- 

 med, \ b not furcate. Hindwings ovate- lanceolate, costa nearly 



