MEMOIR OF LATREILLE. 51 
left to a young and skilful professor, already ac- 
customed to supply his place, all the fatigues of in- 
struction. After so many labours, no one apparently 
could have had any thing to object. But his deli- 
cate conscience would not allow him to enjoy all the 
advantages of a place without filling it. Perhaps 
also he was not insensible to the glory of this new 
career of professorship which was opened before 
him. In order to pursue it with succsss, he engaged 
in extensive works, when his health, which had 
been for a long while much altered, would have re- 
quired the most absolute repose. Then, also, a new 
and entire overthrow in the state, which no one had 
foreseen (not even those by whom it was brought 
about), gave him a new shock, and all these things 
combined, at last crushed the energies of a constitu- 
tion already enfeebled by so much watching and 
fatigue. I shall here transcribe the last note I re- 
ceived from him, because nothing can show better 
the state to which he w r as reduced when he wrote 
his last work, and evince his prodigious persever- 
ance, when he had set himself to the fulfilment of 
his duties. 
“ ‘ In order that my fellow-member and friend, 
M. Walckenaer, may consult my memoir on Bom- 
byx, forming part of my Cours sur l’Entomologie, 
I have had a copy prepared of twenty-three leaves 
of the first volume of my lectures. This memoir 
commences at page 94 and terminates at page 115. 
M. Latreille will afterwards complete the copy. He 
entreats his confrere to excuse him for the many 
