15^7 ) 
Thefe(as the Eggs of all Infedts that have fallen under 
my cognizance, are by the warmth of weather) thefe, 1 
fay, are hatched by the warmth of the approaching Spring, 
which is to them all one as an Incubation. About the 
beginning of March^ or (if the weather be warm) fooner» 
if cold and unfeafonable, later, the Infed is fully hatched, 
and can creep about. 
At the firft leaving their Egg- (hell, they are exceedingly 
fmall, fo as fcarce to be difcerned by the fharpeft Eye^ 
without the help of a Convex-Glafs, 1 have with a Mi- 
crofcope feen them crawling about, but could fcarce 
perceive any Hairs, Feet, &c. But they rather look'd like 
moving EggSe I fuppofe they were covered with their 
Shells, and but juft breaking out of them. At the firft 
leaving their Shells they are leffer than their Eggs, altho 
the Eggs are fcarce vifible without a Microfcope. 
Tbefe young Death- Watches are perfeftly like the ^ 
Mites in Cheefe, a few hairs of the Breech only excepted. 
I could not perceive any difference between them, when 
much magnified with a Microfcope, but only that Mites 
have more Briftles about their Breech. 
In this Shape they continue 6 weeks, or 2 months, feed- 
irrg on divers thingsthey can meet with. They being (as I 
faid) fo very like Mites, I cannot pofitively fay, but have 
great reafon to think , that they werelfwarms of young 
/ Death Watches, which I have feen feeding on dead Flies, 
and other things in M^rc^, ^pri/ afcd May. Indeed they are 
a great annoyance to me, in devouring or defacing my 
Specimens of Infedts. And there are fcarce any forts 
efcape thefe voracious, thp minute Animals. 
From this MiteState.AiQj grow gradually to their more 
f er/cff State. When they become like the old ones, they 
are at firft very fmall, and then can run about more fwift 
;ly, than when Mites, in which Mite^ftate, they creep 
•.but.flowly. 
P.PPPPPPP P ^ Thus 
