466 THE CANADIAN NATURALIST. [Vol. X. 



Antennce, spring,' froDi a bulbous root, and are composed of 13 

 cylindrical joints, having each a v.iiori of five long htiirs — the 

 last joint tipped with a short point or finger; they are -1- in. long, 

 y^Q in. dia., slightly tapering. 



^j/e, compound flattened, hemispherical g-l-Q- in. dia. 



Mead, -1^ in. dia., having an internal pear-shaped sack near 

 posterior part and connected with the labrum. 



Wings, i in. long, -j\ in. broad — the membrane covered with 

 short hairs y'^jo '"• ^'p^'^"'^- The veins or ribs thinly covered with 

 scales; the posterior edge and tip fringed with scales — shaped 

 like a canoe paddle ^l^ in. long, the neck -^q^ in. dia., the 



broadest' part ^^^qq ^"-j '^'^^ 12^50 ^"- ''P'^*'^ — the neck cylin- 

 drical, the blade beautifully striated and in some cases pointed 

 at the ends. Between these there is another row of the same 

 description and form, only half tiie size. 



The total length of the creature from the tip of the labrum to 

 the end of the abdomen is i inch. 



NATURAL HISTORY SOCIETY PROCP^P^DINGS. 



The fourth meeting of the session 1882-83, was held on the 

 evening of February 26th — the President, Dr. Dawson, occupied 

 the chair. 



31essrs. Thomas Kobin and Joseph Fortier were elected ordi- 

 nary members. 



Dr. Alloway exhibited samples of marble, mica and granite 

 from the vicinity of Papineauville, County of Grenville. 



Mr. Walter F. Ferrier then read his 



"Notes on *a Fossil Track from the Potsdasi Sand- 

 stone OF Northern New York State." 



xVnd exhibited the slabs upon which the impressions occur. 



He said the specimen was ibnnd 60 feet from the east edge of 

 the precipice, at Rainbow^ Falls, Ausable Chasm, Essex County, 

 N. Y^., in the cellar of the Ausable Chasm Horse Nail V\^orks. 

 It was quarried out of the rock about five feet below the surface 

 bed. The beds in which it occurs are generally thin and dip 

 to the S.E. r.t an angle of about 3^ 30'. Kipple marks, very 

 well preserved, are abundant in these beds and in some layers, 

 an Ophileta (probably 0. compacts, Salter) has been noticed, but 



