1802. 
miffion are already arrived, with the port- 
folios and notes, the fruits of three yearg 
Jabour. 
In a Memoir read to the Philomathic 
Society, the 13th Nivofe of the year 10, 
on a new kind of infeét, by Citizen A. 
WALCKENAER, the author obferves, that 
after having delcribed from nature more 
than 150 {pecies of {piders, as well indi- 
genous as exotic, he has found that the 
avicuiar fpiders and thofe known by the 
name of mincrs (mineufes) are affimi- 
lated in important charaéters very diftiné- 
ly pronounced; charaéters which, at the 
fame time, place them at a diftance from all 
the infeéts of their genus. He propoks 
therefore to make-a new genus of them, 
which he confiders as one of the meft na- 
tural that has been introduced, in thefe 
latter times, into entomology. He has 
given it the name of. mygaleus, from that 
given by Ariftctle to a particular {pecies 
of {piders, unknown to us at prefent. 
The following are the charaéters’ which 
he has afligned to this new genus :— 
Genus; mygaleus; in French, mygale. 
Two feelers very long, pediform, inferted 
at the extremity of the Jaws.—-Mandi- 
bles horizontal, curved, pre-eminent.— 
jaws cylindrical, formed flanting in the 
intfide.—+Lower-lip very fall. The fol- 
lowing are the principal differences which 
diffinguifh the mygaleus from other 
{piders:—In the mygaleus, the feelers aré 
almoft as big and almoft as long as the 
anterior claws; in fpiders, they are much 
finer and fhorter. In the mygaleus, the 
mandibles follow the ‘direAiocn of the 
corfelet, and are placed horizontally; they 
are curved on the back; in fpiders, the 
mandibles are vertical; in relation to the 
corfelet, they-ave erect. The nails of 
the mandiblcs, in {piders, is received into 
a cavity which is indented on both fides ; 
the nails of the mandibles, in the my- 
galeus, is received into a cavity which is 
indented only in the infide, and ciliated, 
or furnifhed with long hairs on the out- 
fide. In fpiders, the eyes almoft always 
occupy the fore-part of the corfelet, and 
often a great part of its two fides; they 
are, moreover, immediately inferted on 
this fame corfelet; on the contrary, in 
the mygaicus, the eyes are placed on an 
eminence grouped like the Crofs of St. 
Andrew, and only occupy avery {mali 
portion of the fore-part-of the corfelet. 
The author afterwards gives the habitual 
characters of the genus mygaleus, from 
which it refults that the avicular fpiders 
znd the mining {piders are no lefs fimilar 
in their primary charaéters, fuch as the 
polition ef the eyes, the length of the 
Literary and. Philofophical Intelligence. 
971 
feelers, the form and the pofition of the 
mandibles and of the jaws, than in their 
fecondary charaéters, fuch as the refpec- 
tive length of the claws, the form of the 
abdomen and of the corfelet, and even 
the hair and the colour, He eftablithes, 
however, two different families. -The 
firtt family :—The mygaleus with claws 
terminated by naked nails, or the min- 
ing mygaleus. He defcribes three {pecies 
of them, two of which are European, and 
the other is found in the ifland of Jamaica. 
Second family:—The mygaleus, with 
claws terminated by nails concealed be- 
tween the hairs, and whofe lower extre- 
mity is fpongious, or the avicular my- 
galeus. Of thefe he defcribes fix {pecies, 
which are found in America, in Afia, m 
Africa, and in New Holland. He termi- — 
nates this Memoir by obferving, that the 
mygaleus inhabits hot countries, and that 
no {pecies of them has ever been found in 
cold countries. 
The National Library contains among 
its manufcripts, a copy of the celebrated 
infcription of Fa-Ya, the moft ancient ta 
be found in all the empire of China, and 
remarkable not only for its high antiqui- 
ty, but alfo for the fingular form of its 
charaéters. This infcription, fent from 
Pekin by Le Pere Amiot, confirms 
the veracity of that which Dr. Hacar 
publified Jaft' year in London, in his 
magnificent Introduétion to Chinefe, and 
which he drew from a Japanefe Encyclo- 
pedia, written in Chinefe characters, and 
printed in Japan. What ts ftill more in- 
terefting is, that this copy contains the 
explication of every ancient ' charatter, 
made by the moft fkilful antiquarians of 
China, in modern Chinefe charaéers, 
which Dr. Hagar is fhortly about to pub- 
lifh, together with the French tranflation 
made by Father Amiot. 
Citizen BRONGNIART, Director of the 
National Manufa&tory of Porcelain, at 
Sevres, has lately prefented to the Clais of 
Phyfical and Mathematical Sciences of 
the Inftiture a paintigg on glafs, per- 
fe%ly executed, and of dimenions far fur- 
paffing all that has been hitherto done in 
this kind. He has thewn the procefs em- 
ployed in this operation, and in general, 
the means made uf of in the manufactory 
of Sevres, to obtain colours which are 
not to be changed by fire. Among the pat- * 
terns which he preiented, two bouquets 
of rofes painted on porcelain were partie 
culariy diftinguifhed; their colours are fo 
well preferved that, although one of them 
underwent the a&tion of fire, it was im- 
poffible to diftinguith the flightelt altera. 
tion, even in the moft delicate fhades. 
Naz The 
