40 BULLETIN 48, UNITED STATES NATIONAL MUSEUM. 



Expanse of wings, 1*4 to 30 mm. =().!>.") to l.L'O inches. 



Habitat.— Middle and Cential States; Virginia, ^'ew York, and 

 Missouri in June; J)e]aware in May; District of Colaml)ia in August. 



A very interesting and not uncommon species, wliich varies within 

 narrow limits only. The gronnd color differs somewhat in intensity, 

 the angle of the transverse posterior line is sometimes marked, some 

 times rounded, and sometimes a broad curve; the subterminai line may 

 be more or less abruptly terminated below tlie apex, and the wing form 

 may be more or less pointed, or apparently so. 



There can be no mistaking this form in any case, and the course of 

 the subterminai line in the primaries is quite unique in the genus. 

 I would liave been strongly tempted to adopt Mr. (Irote's genus could 

 I have found any reasonably sufficient structural characters. 



Tlie antennae of the male are furnished with rather slender lateral 

 bristles, and the enlargement at basal third is not lu'oininent, the curve 

 slight. Two joints are somewhat shortened and more robust, and are 

 each furnished with au unusually long and slender pointed process. 



The fore legs of the male are after the usual type. The coxa is slen- 

 der, grooved above, with the cavity tilled with elongated scales not 

 forming a tuft or pencil. The trochanter is about one-third the length 

 of the femur. The femur is furnished on the underside with elongated 

 scales, massed at base into a loose tuft of a black color, but not form- 

 ing anywhere a distinct pencil. The tibial process is large, and covers 

 a very dense mass of elongated black scales, forming no obvious pen- 

 cil, but giving the appearance of such at tirst sight. The species is 

 thus characterized by a lack of distinct i»encils of yellow hair and by 

 the fact that the specialized clothing is on the under rather than the 

 upper side of the femur. 



Zanclognatha cruialis, (iiieni'o. 



18."')I. Gncnoe. Si)efiesGenerul, Dcltoides, 58, Ilcrmnila. 

 1850. Wiilker, Cat, Brit, Mns., Ileterocera, XVI, 103, Ilcnuhiia. 

 1872. Grote, Trans. Am. Entomological Snc, IV, <)7. Hermiiiia. 

 1S7.S. Groto, Bull. BntV. Soc. Nat. Sci., I, .".!», /(i))rh>;/)i„th,i. 



jiicch iisalis, Walker. 

 1850. Walker, Cat. Brit. Miis., Ileterocera, X\" I, 101. Iftrminia. 

 180.'?. Smitli, Bull.U. S.Nat. Mns., 44, 382, pr. syn. 



(Iround color a rather dark luteous brown. Primaries with the usual 

 lines well marked and even, not denticulate or crenulate. Basal line 

 wanting in the specimens before me. Transverse anterior line distinct, 

 brown, a little outcurved or bent on the costal vein, thence quite evenly 

 or with a feeble outcurve, to the inner margin. Transverse posterior 

 line slender, brown, broadly outcurved, sometimes subaugulated over the 

 cell and (juite markedly incurved below; sometimes the line is quite 

 evenly bisinuate, Subterminai line (piite prominent, consisting of a 

 narrow pale. ]»iec(Mled by a broader brown shade line, which occasion- 

 ally absoibs its lighter comp;)nioii. In course it is quite rigid from the 



