( i^^6 ) 
IV. J Supplement to the account of the Pediculus 
PulfacoriuSj or Death- Watch, i?i Thilof. Tranf. 
No 271. Serving to the more per/eft natural 
Hijlory of that Infeit. % the Reverend Mr W. 
Derham^K(?^ 5. 
T^He R. Society having fo favourably received my for- 
mer Account of the Death-Watch^ as not only to pub- 
lifti it, but to require alfo my perfefting the Hiftory of 
that Infeft, I think my (elf bound to comply, as far as I 
am able. And therefore I have procured a Draught to 
be made of that Infeft, both as it oppeareth to the naked 
Eye, and as magnified with a Microfcope. £Fig, 4.] fhevv- 
eth it as feen with the naked Eye: [^Fig. 5.] as magni- 
fied. 
Thefe Figures, and only faying, it is very much like a 
Loufe in Shape and Colour, but runneth more nimbly, 
may be a fufficient defcription of an Inieft common in 
every Houfe, in the warm months. For m the cold feafon 
of the Year, they hide themfeives in dry obfcure places, 
and are feldom fcen. 
Of the Generation of the Death-Watch. 
Some time after their Copulation (of which by and 
by ) they lay their Eggs in dry, dufty places, where they 
meet with leaft difturbance. For in fuch, and noneelfe, 
I have found them. Thefe Eggs are exceeding fmall^ 
mucli fmaller than the Nits of Lice 5 althoagh Lice are 
not much bigger than our Inieft is. I hefeEggsare 
Tvbite and f^ap d like Nits, but more tranfparent. " 
Thefe 
