CHIMARRHA. 297 



posterior wings black; intermediate tarsi dilated. (From the de- 

 scription of Say.) 



Length to tip of wings 4 millim. Alar expanse 7 1 millim. 



Hal. Cincinnati, Ohio River, May ; common (Say). 



Is this not B. maculata ? 



CHIMARRHA LEACH. 



Spurs arranged 2, 4, 4; basal joint of the maxillary palpi short, 

 the others longer, equal; three ocelli. 



1. C. aterrima! 



Chimarrha aterrima Hagen ! 



Deep black, with black hair; body, antennae, palpi and feet black, 

 the front with hardly hoary hair ; anterior wings with black hair. 

 Male and female. 



Length to tip of wings 6 8 millim. Alar expanse 11 15 

 millim. 



Hob. Pennsylvania ; Washington ; Dalton, Georgia ; St. Law- 

 rence River, Canada (Osten Sacken). 



2. C. socia! 



Chimarrha socia Hagen ! 



Blackish-fuscous, with fuscous hair ; antennae blackish-fuscous ; 

 palpi and feet luteous ; head and thorax blackish-fuscous, with 

 luteous hair ; anterior wings blackish-fuscous, with fuscous hair, 

 and black cilia; posterior wings blackish-hyaline. 



Length to tip of wings 6 millim. Alar expanse 11 millim. 



Hob, Washington (Osten Sacken). 



3. C. obscura. 



Beraea obscura Walk. ! Catal. 121, 4. 



Blackish, with fuscous hair ; thorax and abdomen ferruginous ; 

 feet testaceous ; antennae black ; wings brownish-black, ciliated. 

 (From the description of Walker.) 



Length to tip of wings 4| millim. Alar expanse 8 millim. 



Nab. St. Martin's Falls, Albany River, Hudson's Bay (Barn- 

 ston). 



Does it belong to this genus ? 



