18 Journal New York Extomological Society, t^'oi- >^xii. 



the antenna, simulating lashes, behind with slight imperfectly dif- 

 ferentiated lashes or none i86. 



185. Front with fine, short, even, hairj' vcstiture, vestitiire of body smooth, 



flattened or mixed Homohadena. 



From tufted above, the tuft more or less distinctly divided vertically and 

 transversely, the collar with a more or less distinct central ridge, 

 often evanescent when the tegulae are spread apart.. Xylina, etc. (76). 



Vestiture all of fine simple hair, without tufts Honwgl<ra. 



186. Tongue weak, non-functional 187. 



Tongue normal 188. 



187. Antennae of both sexes simple, abdomen with basal tuft, wings lanceolate, 



Acronycta, group Eulonche. 

 Antennae of male subpcctinate, of female simple, abdomen with basal 



tuft, wings normal Acronycta, group Merolonche. 



Antennae of both sexes pectinate, abdomen entirely untuftcd (larva aqua'ic, 



a borer) BcUura. 



188. Abdomen with a dorsal crest at base, sometimes slight 189. 



Abdomen at most with loose hair at base, sometimes smoothly scaled 192. 



189. Prothorax with a pyramidal anterior crest, a spreading or divided one 



posteriorly 190. 



Thorax with spreading anterior and posterior tufts, 



Hadcna. groups Sidenua and Luperina. 

 Thorax untuftcd 191. 



190. Outer margin even Hydrcccia. 



Outer margin strongly wavy Macroiwctua. 



191. Palpi upturned about to vertex Atefkmia (Bagisara). 



Palpi upturned about to middle of front Acronycta (Apatela). 



192. Thorax with slight spreading anterior and posterior crests, hind tibia 



often with a spine between the spurs Hadcna, group Litferina. 



Thorax with a slight anterior crest only i93- 



Wholly untufted i94- 



193. Palpi of moth longer, tongue weaker, larva; probably on marsh plants 



and perhaps borers Scnta, group Arenostola. 



Palpi of moth moderate, larva: external feeders and not associated with 



marshes Caradrina, group Athetis. 



194., Vestiture of thorax mostly of spatulate scales.. Atethmia. group Elydna. 



Vestiture of narrow strap-shaped flattened hair Calyinnia. 



Vestiture of fine simple hair Cosmia (Enargia). 



195. Vestiture of imbricate large scales, with a fan-shaped mass laid flat on ' 

 the eyeball in front of the antennae in the position of lashes (easily 

 lost) ; a slight flat raised ridge on the base of the abdomen, and a 

 large flap of broad scales covering the tympanic opening. Female 



frenulum of two bristles Pirctcs (Ingura). 



Female frenulum of three bristles, no scales over eye in the position of 

 lashes, rarely with a scale flap over tympanic opening 196. 



