CONTRIBUTIONS 
TO AN 
INSECT FAUNA OF THE AMAZON VALLEY, 
COLEOPTERA— LONGICOENES, 
Part I. — Lamiaires. 
The number of species of Longicorn Coleoptera which I collected 
at different stations on the banks of the Amazons amounts to 
about 705. The collection appeared to me to contain so large a 
number of curious and interesting forms new to science, tli£tt I 
was anxious to make them known to the entomological public as 
soon as possible, first determining the already known species, 
and fixing upon a classification of the genera and groups. I 
then hoped to be able to give a complete view of the Amazonian 
productions in this department, incorporating a few general re- 
marks on their natural history, instead of following the usual 
and much easier practice of giving merely a bare and unfruitful 
list of diagnoses of the new species. 
It has been a difficult task, however, in the absence of a mo- 
dern monograph on the family, to characterize the genera, and 
especially to group them into subtribes or groups subordinate to 
the four tribes of Latreille, which for a long time constituted 
the only received classification, but are now manifestly insuffi- 
cient to give a lucid view of the contents of this greatly aug- 
B 
