514 
Observations on the various Insects 
ova can be distinctly seen through almost the whole length of the 
«orm to the orifice by which the eggs are discharged." Those 
m the cavities of the mature grain are generally ^-j or of an inch 
long, milk white, and seraitransparent. After laying all their 
eggs, the parent worms soon die, and in a few days they decay and 
fall to pieces ; but such is not the case at an earlier period of life, 
for after being dried and appearing quite dead, on the application 
of moisture they become as lively as they were at first : and thus 
for five years and eiorht months ^Ir. Bauer was able to reanimate 
the worms by immersion, but it required a longer period as the 
time lengthened, and after that they died : other examples bred 
by him retained their revivescent qualities for six years and one 
month. It seems probable that the glutinous substance in which 
they are enveloped preserves their vitality. They may be kept 
alive for three months in water. 
It appears from Mr. Bauer's investigations, that the cavities of 
the orrain are at first filled with a w hite fibrous substance formed 
by gluten into balls of a silky nature. In water they instantly 
dissolve, and exhibit hundreds of minute worms, which become ani- 
mated in less than a quarter of an hour when moistened, and the 
grains eventually assumed a dark bro\vn colour, and were as hard 
as wood. 
Nothing is known regarding the sexes, and it is extremely pro- 
bable the Vibrios are hermaphrodite. In some grains approach- 
ing maturity, only one was found with the cluster of eggs, in others 
there were three. The eggs come forth in strings of five or six 
together (fig. 29), and are detached in water: the young worms 
can then be seen througli the transparent skin (fig. 30). In about 
an hour and a half after the egg is laid in w ater, the voung worm 
begins to extricate itself, which it took one of them an hour and 
twelve minutes to accomplish. 
Such are some of the leading points in the economy of this ex- 
traordinary little animal noticed by Mr. Bauer ; and for further in- 
formation I must refer the reader to his valuable Paper, and to 
Professor Henslow's interesting Report. The figures we have 
added to illustrate the history of the Vibrio will be found de- 
scribed at the end of this Paper. 
Summary of the foregoing Report. 
Parasitic flies living upon the wheat-midge, Cecidomyia Tritici, 
and upon each another. 
Platygaster Tipulo', found during summer months, deposits its 
eggs in the maggots of the wheat-midge. It is exceedingly 
abundant. 
It lays only one egg in each maggot, passing by those previously 
inoculated. 
