60 WILLIAM G. DIETZ, M. D. 



wings elongate, a deep rich golden brown, traversed by white longitudinal lines; 

 extreme costa and dorsal margin pale, several lines, more or less communicating, 

 in costal part of wing, two other lines arise from middle of base, run parallel 

 through the disc to about the posterior angle of cell, another line begins beyond 

 middle of dorsal margin, is curved, touches the dorsal margin some distance be- 

 fore the apex and ends immediately below it. Periapical cilia dark brown, 

 traversed by four, sharply defined white lines, remainder white, with some scat- 

 tered, brown scales. Hind wings gray, cilia concolorous; underside of wings pale 

 fuscous gray. Abdomen above, body beneath and legs ochreous, more or less 

 tinged with fuscous; tarsal joints pale at apex. 

 Exp. 10.0-14.5 mm. ; 0.4-9.58 inch. 



Hub. — District of Columbia ; Florida (Hastings) ; Pennsylvania 

 (Hazleton). 



This species was bred by the late Dr. Riley, from fungus ; and 

 after whom it was named by Lord Walsingham, but never described. 

 I gladly retain the name by which it is known in our collections. 

 It has veins 4 and 5 of hindwing stalked. 



Defectella Group. 



A number of species belong here. Color of forewings white, 

 rarely ochreous brown (cloacella), with dark brown markings. Hind- 

 wings narrower than the forewings; outer half or two fifths of costa 

 distinctly retuse. The wings are generally elongate, pointed; more 

 rarely moderately wide, and become towards the end of the series, 

 especially the hindwings, almost lanceolate. The characters used 

 in the synoptic table of species may not always be definite enough 

 to convey to the student a concise concept, but it is hoped that 

 these, with the descriptions and illustrations, will enable him to de- 

 termine his material with reasonable certainty. 



The species are distinguished as follows: 



Large costal spot before or about the middle of forewing, extending into the disc. 

 A dorsal spot before the middle, which forms with the costal spot a more or less 

 complete fascia. 

 Dorsal spot commences on the margin. 



Fascia wide, not angulated externally, head ochreous. .molyfoclaiiella. 

 Fascia angulated externally, head white. 



Angle of fascia extends towards end of cell geniculatella. 



Angle of fascia not extended. 

 Dorsal spot very conspicuous, widest on the margin ; heavy streak on 



basal fourth of costa arcella. 



Dorsal spot inconspicuous, base of costa simply spotted. 



Forewings with lustre, markings dark brown ; without spot at end 



of cell :• it ripu It el la . 



Forewings dull ; markings pale brown, inconspicuous ; spot at end of 

 (til a«*apiiopeiiuella. 



