36 Addenda to the Natural History 



Family. — Ursid^e. 



" Fam. Ch. Toes distinctly separated, five on each foot ; walk 

 plantigrade ; coccum wanting. The sectorial tooth and the 

 molars behind them tuberculated. 



Ursus. — Linn. 



Gen. Ch. Body thick, clumsy, and large. Feet entirely 

 plantigrade ; soles naked ; nails long ; tail very short ; head very 

 broad. Dentition, incisors |:| caniues \'.\ premolars |:f molars 

 |:| II = 42." Baird. 



Of this sub-family those found in this district will probably be : 

 1. Ursus Americanus. 2. Ursus Horrihilis. 3. Ursus Mari- 

 timus, and 4. Ursus Arctos or Barren Ground Bear. 



Of the identity of the second and fourth of these, I am not by 

 any means certain, and one at least, if not both, will probably be 

 found to be an unnamed if not an und escribed species. 



ARTICLE III. — Addenda to the Natural History of the Valley 

 of the River Rouge. By W. S. M. D' Urban. 



{Seepages 81—99 Vol. V.) 



Lepidoptera. 



The names and descriptions of the following species were not 

 received from Mr. Francis AValker in time for publication in their 

 proper places, in the second part of the " Natural History of the 

 River Rouge," contained in the April number of this Magazine. 



Sphingina. — Family, ^geriidae, Steph. 

 Thyris vitrina^ Boisd. Bevin's Lake, Montcalm, 5th July. 



Bombycina. — Family, Liparidae, Walker. 



Dasychira clandestina, Walker, M. S. S., n. sp. Bevin's Lake, Montcalm, 

 lih July. 



" Mas. Cinerea, nigroraria, dense pilosa ; antenna breves, late pecti- 

 natse ; pedes breves, pilosissimi; alae nigro nebulosas, lineis quatuor 

 denis undulatis nigris apud costam dilatatis.'"' 



" Male. Cinereous, varied with black, thickly pilose. Antennae short, 

 broadly pectinated. Legs short, very pilose. Wings partly shaded 

 with black, with four irregular undulating black lines which are 

 dilated on the costa of the forewings ; under side paler, with the 

 lines obsolete except by the costa. Length of the body 6 lines, of 

 the wings 14 lines." Walker, M.S.S. 



