260 BULLETIN 44, UNITED STATES NATIONAL MUSEUM. 



Genus PLUSIODONTA Gn. 

 1852. Gn., Spec. Gen., Noct., ii, 359. 



P. compressipalpis Gn.* 



1852. Gn., Spec. Gen., Noct., li, 359, pL 12, f. 2, Phmodonta. 

 1857. Wlk., C. B. Mus., Het., xii, 938, Phtsmlontn. 



insignis Wlk. 

 1865. Wlk., C. B. Mus., Het., xxxiii, 842, ? IHusiodonta. 



Habitat. — Canada to Georgia, to Texas; east of the Eocky Moun- 

 tains, June, July, Sei)tember. 



The types are in the British Museum. It is one of the mysteries 

 how Walker, with Gruenee's type and figure before him, could rename 

 so prominent a species. 



Genus HYPSOROPHA Hbn. 

 1816. Hlui., Verzeichiiiss, 249. 



H. nionilis Fabr.* 



1781. Fabr., Spec. Ins., ii, 219, Noetua. 

 1787. Ftibr., Mant. Ins., ii, 147, Xoctua. 

 1793. Fabr., Ent. Syst., iii, 2, 46, iSoetua. 

 1811. 01iv.,Encycl. Meth., viii, 281, Noetua. 

 1816. Hbn., Verzeichniss, 249, Hfipsoroplia. 

 1818. Hbn., Zutraege, f. 23 and 24, Rypsoropha. 

 1857. Wlk., C. B. Mus., Het., xiii, 994, Rypsoropha. 

 1880. Grt., Can. Ent., xii, 85, Rypsoropha. 



Habitat. — Southern States; west to Kansas. Missouri in June. 



H. hormos Hbn. 



1818. Hbn., Zutraege, 10, ff. 27, 28, Rypsoropha. 

 1816. Hbn., Verzeichniss, 249, Rypsoropha horma. 

 1852. Gn., Spec. Gen., Noct., Ii, 403, Monogona. 

 1857. Wlk., C. B. Mus., Het., xiii, 995, Tiaiispa. 

 1880. Grt., Can. Ent. xir, 85, Rypsoropha. 



Habitat. — I^ew York to Texas; Central States. District of Col- 

 umbia in August. 



Genus HEMICERAS Gn. 

 1852. Gn., Spec. Gen., Noct., ii, 379. 



H. cadmia Gn. 



1852. Gn., Spec. Gen., Noct., ii, 383, pi. 13 f. 2, Remiccras. 

 1857. Wlk., C. B. Mus., Het., xiii, 970, Hemiceras. 



obliquilinea Wlk. 

 1862. Wlk., C. B. Mus., Het., xxvi, 1695, Comidava. 



Habitat. — Middle and Southern States. 



Walker's type is in the British Museum, while that of M. Guen<:''e is 

 at Bennes with M. Oberthiir. Walker's species was described as a 

 geometrid, from Venezuela. 



