NATHAN BANKS. 217 



13. Costal area very broad, costals crossed ; median fork not running 



into the cubitus Rapisma. 



Costal area rather narrow, costals not crossed ; median fork runs 

 into the cubital vein Oliarces. 



14. Outer margin of fore-wings plainly excised ; five or more radial 



sectors Drepaneptei'j'X. 



Outer margin not plainly excised 15. 



15. A connecting veinlet between the first radial sector and the median 



before middle of wing, above the cross-veins from cubitus 

 to median and to anal, thus forming a basal gradate 



series 17. 



No such connecting veinlet, but often one from median to radius 

 before the origin of the first radial sector 16. 



16. At least five radial sectors ; wings very broad Megaloiims. 



From two to four radial sectors ; wings much narrower. 



Heinerobius. 



17. Six or more radial sectors ; wings very broad ; three gradate series. 



Neuroneiiia. 

 Not more than four radial sectors 18. 



18. But one series of gradates beyond middle of fore-wings. 



Carobius. 

 Two series of gradates beyond middle of fore-wings 19. 



19. Fore-wings plainly acute at tip ; each radial sector connected three 



times to the next Megaloniina. 



Apex of fore-wings rounded 20. 



20. Outer gradate series reaching obliquely backward to before mid- 



dle of hind margin Psychobiella. 



Outer gradate series not reaching back to middle of wing. 



Borioinyia. 

 5"ar/^«a = Neurortlius. 



Sienolotmis = M.egalonins. 



Nemis = Micronius. 



Hemerodomia and iV/r^wd^r^^= Borioinyia. 



A7i7iandalia — Notiobiella. 



Spadobius and /'a/;«o(^z«.y = Sympherobiiis. 



GAYOMIA n. gen. 

 Distinguishable from other Hemerobiidae by the densely 

 reticulate basal and costal parts of wing ; many cross-veins 

 elsewhere quite irregular ; recurrent vein present ; many 

 cross-veins between the radius and subcosta in fore-wings ; 

 in fore-wings at least five radial sectors, the fifth with five 

 or more branches ; in hind-wings with two radial sectors, 

 the first running up to the second and then away, and with 



TRANS. AM. ENT. SOC. , XXXIX. (28) 



