ne 
Rin HANS 
derives from his careful considerations of these six structures are as 
follows: 
(1) The fat body of the Insecta is derived from the mesoderm—being a differenti- 
ation of portions of the celomic walls and therefore metameric in origin. 
(2) The cnocytes are derived by delamination or immigration from the ectoderm, 
just caudad to the tracheal involutions. They are also metameric organs. 
(3) They are limited to the eight trachigerous abdominal segments. 
~ (4) They appear to be restricted to the Pterygota, in all the members of which 
group they probably occur. 
(5) They give rise neither to the fat body nor to the blood, but represent organs 
sui generis. 
(6) After their differentiation from the primitive ectoderm they never divide, but 
gradually increase in size. 
(7) The blood corpuscles of these Insecta appear to arise early in embryonic life 
and perhaps also in post-embryonic life from undifferentiated mesoderm cells. The 
evidence of the derivation of the blood corpuscles from the fat body as such is unsat- 
isfactery. 
(8) The subesophageal body arises in the trito-cerebral segment apparently from 
the mesoderm. Though it resembles the fat body, it must be regarded as a distinet 
organ. It disappears during larval life. : 
DAMAGE TO BOOTS AND SHOES BY SITODREPA PANICEA, 
Two interesting cases of damage to boots and shoes have come to our 
knowledge almost simultaneously from two widely separated quarters 
of the world. Mr. Walter W. Froggatt, in Technological Education 
Series Bulletin No. 8, of the Technological Museum, Sydney, N.S. W., 
has given an account of the damage done in Sydney by the larve and 
adults of Sitodrepa panicea in trunks of imported boots. It seems that 
on the 7th of last October he examined five infested trunks and found 
that men’s leather boots, ladies’ kids, and carpet slippers were all 
attacked in the same manner. The method of work of the beetles 
seemed to be to riddle the soles with small transverse and vertical bur- 
rows; they also attacked the tips of the uppers and occasionally damaged 
the sides. So far as known all of the damaged goods were of English 
manufacture, and none of those from continental houses showed any 
signs of the pest. A Chalcidid parasite was also found, which, from the 
figure given, seems to belong to the subfamily Pteromaline. Treat- 
ment with bisulphide of carbon was recommended by Mr. Froggatt, who 
also urges that immediate measures be taken to stamp the insect out, 
on the supposition that it is a new importation. 
Only a day or two after this little paper reached us we received speci- 
mens of the same insect from Mr. John P. Campbell, of Athens, Ga., 
with an account of almost precisely similar damage to boots in a boot 
and shoe establishment in that city. We recommended substantially 
the same measures which we had already proposed in a case of similar 
damage by Dermestes vulpinus, described in our Annual Report for 1885, 
and requested particulars as to the locality from which the boots were 
received. We have not yet been informed as to this point, and so far 
as we know this habit of the beetles is new to the United States. 
0) HO as rw ee 
