182 Journal New York Entomological Society. fVoi. xxi. 



In Trigonophora the vestiture of the patagi?e is evenly sheared off, 

 as in Euplcxia. 



Tapinostola has stumpy oblong wings combined with slight tufting. 

 It seems to be confined to marshes. 



The remaining Noctuidce not considered here differ in strong and 

 definite structural characters, mostly in the venation, armature of 

 tibiae, presence of hair on the eyes, or frontal modification. Hillia is 

 not considered from lack of material but should be included, as it com- 

 bines the structures of Dryobota with those of the dticta group. 



I. All the veins contrasting, white Ltiperina niveivenosa. 



I. Veins largely white on outer part of wing. . . .Helotropha (Eustrotia) retis. 



I. With tip of stem of Cu, and base of Cu^ and M^ white, the other veins 



inconspicuous 2. 



1. Without contrasting white veins 4. 



2. Abdomen smooth Ltiperina stipata. 



2. Abdomen tufted dorsally 3. 



3. Expanse about two inches, body heavy and vestiture deep. 



Helotropha reniformis. 



3. Expanse much less, body rather slender and vestiture almost scaly. 



Helotropha {Eustrotia) caducaA 



4. Marked more or less with green 5. 



4. Without any decided green markings 7- 



5. Contrasting white t.a. and t.p. lines Chytonix (Hadena) viridimusca, 



Chytonix (Hadena) chlorostigma.^ 

 5. A large white reniform Hadena miselioides. 



5. White marks inconspicuous 6. 



6. Largely purple, an oblique pale shade along M^ and Cii^, with a triangular 



dark claviform below Trachea delicata. 



6. Ground color green, evenly marked with blackish ... .Hadena miselioides. 



7. Dull black with velvety black m^Lvkmgs. . . .Xylophasia {Trachea) impulsa. 



7. Paler or with considerable pale markings 8. 



8. Hind wing yellow with strong blackish veins, outer shade and post-medial 



line Xylophasia {Trachea) inordinata. 



8. Hind wing not bright-colored 9- 



9. Subterminal space finely striate on and between the veins. 



Dipterygia {Hadena) patina. 



1 Caduca is typically red-brown, blackish specimens of this appearance 

 would perhaps be better placed in H. retis. 



2 These two names may represent but a single species. //. chlorostigma 

 is described as smaller, expanding rather under i inch, with the green con- 

 fined mostly to the centers of orbicular and reniform spots, and with a small 

 black claviform. H. viridimusca is larger, with rather more green and larger 

 dark-outlined claviform. Both belong to Chytonix. 



