178 BULLETIN U, UNITED STATES NATIONAL MUSEUM. 



H. limpida (in. 



1852. Gil., Spec. Gen., Noct., i, 124, (iortyna. 



1856. Wlk., C. 1>. Mu8., Het., ix, 157, Goriijna. 



1873. Grt., BulL Buff. Soc. Nat. Sci., i, 110, Hiidroru,. 



1881. Grt., Bull. Geol. Surv., \i, 2(i9, (ioriuua. 



Habitat. — New York; Eastern and ;\Ii<l(lle States; Massacliusetts 

 in September. 



The type is in the British INInseuni, and has been spoken of nnder 

 marginidens. 



H. cerus.sata Grt. 



1864. Grt., Proc. Ent. Soc. Phil., ir, 431, ])1. ix, f. 1, (iorlijna. 



1873. Grt., Bull. Buff. Soc. Nat. Sci., i, 110, Hydravia. 



1874. Grt., Bull. Buff. Soc. Nat. Sci., ii, 18, = Zrm^ncfa. 



1875. Grt., Bull. Buff\ Soc. Nat. Sci., ir, 216, an sj). dist. 

 1881. Grt., Bull. Geol. Surv., vi, 269, Goriyva. 



Habitat. — Pennsylvania ; New \ ork ; Massachnsetts in September. 



The type should be in the collection of the Ameri(;an Entomological 

 Society; but I have not found it there. It is undoul)tedly a near rela- 

 tive of linq)i<Ja; but seems distinct and at all events needs critical study 

 before delinite conclusions can be readied. 



H. appasionata llarv. 



1876. llarv., Can. Eut., viii, 1.55, (iortyna. 



Habitat. — London, Canada. 



The type of tliis very distinct species is in the British Museum. 



H. nitela Gii.* 



1852. Gn., Spec. Gen., Noct., i, 124, Goriyna. 



1856. Wlk., C. B. Mus., Het., ix, 158, Gorfyiia. 



1869. Pack., Giiide to Study Insects, 310, f. 241, (ioriyna. 



1869. Riley, 1st Rei.t. Ins. Mo., 92, larva. 



1870. Riley, Amer. Ent., i, 22, f. 11. larva. 



1872. Le Baron, 3d Rcpt. Ins. 111., 141, f. 1 and 2, larva. 



1873. Grt., Bull. Buff. Soc Nat. Sci., i, 111, Hydruna. 



1875. Pack., 9tli Ann. Rept. (Jeol. Surv., 719, pi. 65, i. 6, (;ortyna. 



1876. Riley, 8th Rept. Ins. Mo., 37, hirva. 

 187S. Ereuch, 7th Rept. Ins. Ills., 221, larva. 



1880. Riley, Amer. Ent., in, 201, f. 107, Goriymi. 

 1883. Saund., Emit Insects, 334, f. 347, 348, larra. 



1883. Osborn, Can. Eut., xv. 174, hirval habits. 



1884. Liut., 1st Rept. New York State Eut., 110, f. 26, larva, 

 var. nebris Gn.* 



1852. Gn., Spec. Gen., Noct., i, 124, Gorlyna. 



18.56. Wlk., C. B. Mus., Ilet., ix, 1.57, Gorlyna. 



1878. Graef, Bull. Bklu. Eut. Soc, i. 7. pr. var. 



1881. Riley, Papilio, i, 107, habits and var. 



1881. Riley, Index and Supplt. to Mo. Remits., 56. pr. syn. 



Habitat. — Canada to Georgia, west to the Kocky Mountains; East- 

 ern States iu September. 



