CONTRIBUTIONS 
OP THE 
MACLURIAN LYCEUM 
Ta THE 
ARTS AND SCIENCES. 
Vol. I. JANUARY, 1829. No. 3. 
CONTENTS. 
Page 
On Pyroxene. By G. Tkoost, M. D. (Continued) - - 61 
Remarks on the Achatina Stewartii. By Jacob Gkeen, A. M. 66 
Descriptions of new species of Hxmenopteha of the United 
States. By Thomas Sat, - - - - - 67 
Notice, 83 
Plate. 
PHILADELPHIA: 
SOLD FOR THE MACLURIAN LYCEUM BY J. DOBSON, 108 
CHESNUT STREET; G. 8c C. CARVILL, BROADWAY, NEW 
YORK; JOHN MILLER, LONDON^ AND J. B. BAILLIERB, 
PARIS. 
J. RICHARDS, FRIITTEB. 
1829. 
