NATHAN BANKS. 355 



13. Head dark, wings much maculate, male front tibife marked with 



dark 14. 



Head pale, wings hardly maculate ; male front tibia unmarked.. 15. 



14. No unspotted spaces on margin of wing; less black Carolina. 



Margin with some unspotted spaces, deep black tbrniosa. 



15. Wings shorter and rounded ang'elita. 



Wings long and nearly pointed bruniiea. 



Glossosonia nigrior n. sp. 



Black ; antennae pale, darker at tip ; palpi black ; head and thorax 

 with black and white hair, ocellar warts transverse, about one and 

 one-half diameters apart; abdomen black; legs pale yellowish, spurs 

 brown. Wings blackish, fringe black, stigma dark. Venter of male 

 with two spines near tip ; metatarsi of middle legs of female broad and 

 flattened. Wings moderately long, fork of median vein as far back as 

 the fork of radial sector, fork 4 wide at tip, much shorter than 3 or 5. 



Expanse 18 mm. 



From Black Mountain, North Carolina, north fork of the 

 Swannanoa River, May. 



SERICOSTOMATID^. 

 Bracliycentriis occideiitalis n sp. 



Two males from Bon Accord, British Columbia. 



May 4th (Russell coll.) are very similar to B. iiicamis ; the 

 hair of maxillary palpi is mixed grey and black ; the male 

 appendages black and acute at tip, together forming a nar- 

 rowly cleft plate (it is so in both specimens, and in a series 

 of B. incanns they form an entire plate) . The lobe of penulti- 

 mate ventral segment is broader than in B. i?ican7is, and 

 blackish at tip. 



Our species of Brachycentras may be separated as follows : 



1 . Femora yellowish 2 . 



Femora black 3. 



2. Wings of ? whitish ; superior appendages of cf forming an entire 



plate liitescens. 



Wings of 9 dark grey ; superior appendages of c? forming an 

 emarginate plate siiiiilis. 



3. Superior appendages of c? forming an entire plate, penultimate 



ventral segment with a very narrow lobe incaJius. 



Superior appendages of d^ forming a cleft or emarginate plate 4. 



4. Superior appendages of cf forming a broadly emarginate plate ; 



penultimate ventral segment not produced in a rounded lobe, 



only slightly angularly produced nigrisoma. 



Superior appendages of cf forming a narrowly cleft plate ; penulti- 

 mate ventral segment with a rather broad lobe. 



occi(leutali.s. 



TRANS. AM. ENT. SOC. , XXXVII. 



