412 ACADEMY OF NATURAL SCIENCES 



2. B. ARIDA. — Brownish ; posterior pairs of feet and setae 

 white. 



Inhabits Indiana. 



Body reddish-brown, with dusky incisures ; head rather pro- 

 minent, whitish, varied with ferruginous ; vertex with a small 

 black spot each side on the orbit ; eyes rufous, with a whitish 

 vitta; stemmata prominent, approximate ; anterior one nearly as 

 large as the others; wings immaculate, inferior pair more than 

 one-third the length of the other; anterior tibiae whitish, obscure 

 at base and tip ; posterior pairs of feet and setae greenish-white : 

 tergum with the posterior margins of the segments. 



Length two-fifths of an inch. 



It occurs about the middle of June. 



3. B. VERTicis. — Yellowish-white; head and double thoracic 

 vitta ferruginous. 



Inhabits Indiana. 



Body yellowish-white; head sessile; vertex ferruginous; thorax 

 with two ferruginous vittse, confluent before, and becoming obso- 

 lete behind; wings with the nervures, except those of the margin, 

 [43] black ; inferior wings not extending beyond the fourth ab- 

 dominal segments ; setae hardly longer than the body, the inci- 

 sures black ; feet white ; anterior thighs ferruginous at tip ; an- 

 terior tibiae at tip, and their tarsal incisures, fuscous. 



Length over one-fourth of an inch, of the setae over three- 

 tenths. 



Caught in the window in August. 



4. B. OBESA. — Body short; wings blackish, with a hyaline 

 spot, and numerous smaller ones. 



Inhabits Indiana. 



Body very short, robust, blackish livid ; wings dark brown or 

 blackish, with numerous small, transverse, hyaline, very oblique, 

 semifasciae about the middle on the anal half; inferior pair ex- 

 cepting on the apical margin with numerous transverse, abbre- 

 viated, hyaline lines; abdomen with a dull, rufous, livid margin 

 to the segments ; setae very short, hairy, with black incisures ; 

 feet pale yellowish ; incisures of the tarsi black 



Length over three-tenths of an inch. 



This species is not common. 



[Vol. VIII. 



