THE CANADIAN ENTOMOLOGIST. 243 



Secondaries. — Three internal veins. Median (cubitus) 4-branched ; 

 4_5 (v,, V,) stalked ; 6 (v.) above angle of cell ; 7 (in.) from cross- 

 vein joining end of cell with 8 (11.); false discal (media) furcate ; frenulum 

 large. AVing shape nearer Thyridopteryx than Oiketicus, but colour of 

 the latter. Primaries less drawn out at apex ; secondaries less pointed 

 than in O. Abbotii. Larval case built on the type of Thyridopteryx. 



Colour umber-brown (Ridgway in. 14), paler than Abbotii; secon- 

 daries scarcely tinged with smoky outwardly ; body a little darker than 

 the wings. Primaries brown, palest in the area below the cell, the 

 terminal portion between end of cell and margin a shade darker. A 

 vitreous bar at the end of the cell covering the cross-vein as in O. Abbotii. 

 A blackish-brown shade fills the cell and obtains slightly in the inter- 

 space between veins 6-8 just beyond the vitreous bar and in an oblique 

 shade from lower corner of cell, directed towards anal angle. A black 

 shade below vein i at base, extending as far as the branch to the margin. 

 Subcostal and median veins less closely approximated than in O. Abbotii^ 

 so that the blackish space is more pointedly triangular and extends 

 narrowly to base. Below all brown, the vitreous space only showing. 

 Expanse, 36.5 mm ; length, 20 mm. 



O. Townsendi is nearer the genus Thyridopteryx than Oiketicus, 

 though not structurally identical with either. 



Family MegalgpygiD/E. 



Specimens of the species figured by StoU as Amanda were received 

 from Colombia under the generic term Artace. In Kirby's catalogue it 

 stands as Dryocampa (?) a?nanda^ following Walker. Even a casual 

 examination is sufficient to show that it does not belong to either of 

 these genera, and, indeed, to neither the Lasiocampidse nor the Cither- 

 oniidse. A glance at the accompanying figure of the venation will show 

 that the moth belongs to the group of the more specialized Micro- 

 lepidoptera, and I am in doubt whether to refer it to the Eucleidse 

 (Limacodidse) or to the Megalopygidse. The Megalopygidae are essen- 

 tially Eucleids with hairy larvae, or, rather, the Eucleidse are the more 

 specialized type which have lost the larval hairs. In the absence of any 

 knowledge of the larva of ajuanda, I am in doubt as to its position. I 

 have separated these families by the characters of their antennse ; this 

 applies to the North American species only, and fails when we consider 

 the Eucleidfe of the world. Therefore I have at present no positive 

 diagnostic character to separate the imagines of these families. 



