yim CONTENTS. 
Page 
On the Means by which various Animals adhere to the 
Vertical Surfaces of Highly Polished Bodies ........ 216 
Facts relative to the Movements of Insects on Dry, Polished, 
Vertical Surfaces wave iwiuy advan edeaweekees +. 226 
On an Insect of the Family Ichneumonide whose Larva is 
Parasitic on. Spiders is wise cisa sss cane as Raa aeaes 233 
Experiments and Observations on the Poison of Animals of 
the Order Araneidea...... Dit aggietsedngaeaeawy 240 
Observations and Experiments on Aéronautic Spiders, made 
chiefly with a view to ascertain the Means by which 
they effect their Aérial Excursions ................ 257 
On the Manner in which the Geometric Spiders construct 
ther Nets 550. /sev aie Gk Ber oa da Gam, em oe ea 276 
Observations on the Structure and Economy of Spiders.... 290 
Explanation of the Plates: cn cuswsgasees esa ge avasnes 335 
TOR: . cackisrer odes tia eae oe neg oa aren eats 337 
ERRATUM. 
Page 193, line 7 from bottom, for internally read externally. 
