of the Valley of the River Rouge. 37 



Jludela. N. G. Walker, M.S.S. 



Mas. Corpus crassum, pilosissimum. Proboscis brevis, tenuis. Palpi 

 breves, graciles, oblique ascendentes ; articulus 3us longi-conicus, 21 

 dimidio brevior. Antenna subpectinatae, ramis subclavatis. Ab- 

 domen depressum, apice quadratum, alas posticas paullo superans. 

 Pedes robusti, pilosissimi, calcaribus breviusculis. Alae validae ; an- 

 ticae apice subrotundatae, margine exteriore vix convexo sat ob- 

 liquo." 



" iJfaZe. Body thick, very pilose. Proboscis short, feeble. Palpi short, 

 slender, obliquely ascending ; third joint elongate- conical, less than 

 half the length of the second. Antennse slightly pectinated ; 

 branches subclavate. Abdomen depressed, quadrate at the tip, 

 extending a little beyond the hind wings. Legs stout, very pilose ; 

 spurs rather short. Wings stout, moderately broad. Forewings 

 somewhat rounded at the tips ; costa straight ; exterior border 

 hardly convex, rather oblique ; interior angle not prominent." 

 Jiudela acronyctoides, Walker, M.S.S. , n. sp. Township of Montcalm, 

 June. 



" Mas. Albida, nigro-varia ; antennae fulvae ; abdomen nigricans, 

 segmentis albido marginatis ; alae anticae nigricantes, fasciis tribus 

 albidis, la lata diffusa informis, 2a 3a que angustis angulosis sub- 

 parallelis, litura discali obliqua sublunata nigro marginata ; pos- 

 ticae pallide cinereae, trilineatae." 



" Male. Whitish, mingled with black. Antennse tawny. Abdomen 

 blackish ; hind borders of the segments whitish. Legs mostly black ; 

 tarsi with white bands. Forewings blackish with three whitish 

 bands, first band broad, diffuse, very irregular ; second and third 

 slender, zigzag, nearly parallel to each other ; discal mark oblique, 

 sublunate, black-bordered ; fringe blackish, with white streaks op- 

 posite the veins. Hindwings pale cinereous ; discal mark, one inte- 

 rior and two diffuse undulating exterior lines, dark cinereous : 

 marginal line black. Length of the body 9 lines ; of the wings 18 

 lines." Walker, M.S.S. 



Family, Notodontidae, Steph. 



Heterocampa semiplaga, Walker, M.S.S., n. sp. Common, Township of 

 Montcalm, June. 

 ^^ Mas et FcBm. Cinerea, dense pilosa, olivaceo subtincta ; palpi ob- 

 lique ascendentes ; thorax postice et abdomen basi nigra ; alae 

 nigro nebulosae, lineis tribus nigris denticulatis indistinctis, linea 

 marginali nigra, fimbria nigro punctata ; anticae linea submarginali 

 e guttis nigris." 

 ^^ Male and Female. Cinereous, thickly pilose, with a slight olive- 

 green tinge, whitish cinereous beneath. Palpi distinct, obliquely 

 ascending, ndt extending beyond the frontal tuft. Thorax by the 

 hind border and abdomen at the base black. Wings partly clouded 

 with black, adorned with three indistinct irregular denticulated 

 black lines ; marginal line black ; fringe with black points. Fore- 



