INTRODUCTION. iy 
by Mr. F. Sarg, from Guatemala, whose coloured drawings of living specimens, and notes 
on their habits, have been of great assistance ; by Mr. H. H. Smith, from Mexico, who 
also supplied us with an account of his observations on many of the species; and by 
Mr. G. C. Champion, from the State of Panama, whose collections of spiders were mostly 
made during the dry season, between November and March, 1883. 
The fifty-four Plates, the drawings for which were made by myself and transferred 
to stone by Mr. E. Wilson, include figures of upwards of 900 species, with very many 
details of structure. Fifty-one Plates are devoted to the Araneidea and three to the 
Opiliones ; twenty-four of the former are wholly or partially coloured. 
F. O. P.-C. 
January, 1905, 
BIOL, CENTR.-AMER., Arachn. Aran. & Opil., Vol. IT., January 1905. b 
