380 BULLETIN 4-1, UNITED STATES NATIONAL MUSEUM. 



Genus MEGACHYTA Grt. 

 1873. Grt., Trans. Am. Eut. Soc., iv, 306. 



M. lituralis Hbn.* 



1818. TTbn., Zutrage, i. 9, f. 19, 20, Eplzeuxls. 



1816. llbu., Verzcicliuiss, 346, Epi:ciixis. 



1S54. Gn., Spec. Gen., Delt.. 79, Hvlla. 



1859. Wlk., C. B. Mus., Met., xvi, 134, Eplzeuxis. 



1872. /cllc.r, Verb. k. k. zool. bot. Ges.. xxn, 473, Zanclognaflia. 



1873. Grt., Trans. Am. Ent. Soc., IV, 306, Mrt/ut-hyta. 



HABITAT. Canada to Florida and Texas; Central States; New 

 York and Delaware in June; District Columbia in August. 



M. theralis Wlk. * 



1859. Wlk., C. B. Mus., Het., xix, 855, Herminia. 

 dercptricfiHs Zdl. 



1872. Zcller, Verb. k. k. zool. bot. Ges., xxir, 473, Zandognafha. 



var. gypsalis Grt. 

 1880. Grt., Bull. Bkln. Ent. Soc., in, 65, Megacliyta. 



HABITAT. Nova Scotia to North Carolina, to Ohio. 



Walker's type is in the British Museum, and is the dec&ptricalis of 

 the Grote collection and of Zeller. The type of gypsalis, also in the 

 Museum, is a partly suffused form, scarcely worthy of a varietal name. 



M. inconspicualis Grt. 

 1883. Grt., Can. Ent., xv, 30, Mt-gacliyla. 



HABITAT. New York. 



The type is in the Hill collection. 



Genus HORMISA Wlk. 

 1859. Wlk., C. B. Mus., Met., xvi, 71. 



H. absorptalis Wlk.* 



1859. Wlk., C. B. Mus., Het., xvi, 74, Hormisa. 



iuiliil'(l'(inci(i Grt. 



1873. Grt,, Bull. Buff. Soc. Nat. Sci., i, 85, pi. 2, f. 2, 3, LifognatJia. 



HABITAT. Canada to Virginia; Central States; New York, in July. 



Both types are in the British Museum. Mr. Grote refers absorptdlis 

 to fipi.zt'it.rlx wmula, and at first sight this appears correct, from the 

 rubbed condition of the specimen; but more careful comparisons show 

 that the species named by Mr. Grote nuMllfascia is represented. The 

 present species is fairly to be considered the type of Hormisa, and must 

 replace Litognatha, which has the same type. A type of nuMlifascia is 

 also in Dr. Lintner's collection. 



H. litophora Grt. 

 1873. Grt., Bull. Buff. Soc. Nat. Sci.,i, 86, Litognalha. 



HABITAT. Middle and Central States. 



The types are in the British Museum and in Dr. Lintner's collection. 



