STATES OF INSECTS. (Lge.) 67 
crane-fly (Zzpula), assured me that several females which 
he caught projected their eggs to the distance of more 
than ten inches. 
A few Diptera extrude them in a sort of chain or 
necklace, each egg being connected by a glutinous mat- 
ter with that which precedes and follows it. In a small 
species of a genus allied to Psychoda (a kind of midge), 
which one season was abundant in a window of my house, 
this necklace is composed of eggs joined by their sides, 
not unlike those strung by children of the seeds of the 
mallow*. Other T7zpulide on the contrary extrude their 
eggs joined end to end, so as to resemble a necklace of 
oval beads. Beris clavipes and Sciara Thome, two other 
flies, produce a chain about an inch long, consisting of 
oval eggs connected, in an oblique position, side by side; 
an arrangement very similar prevails in the ribband of 
eggs which drop from some of the Lphemere®. 
These eggs, like those of the insects first mentioned, 
though connected, are expelled in succession; but other 
tribes, as the Lidellulina, with the exception of Agrion, 
many Ephemera, Trichopterous imsects, &c. expel the 
whole at once, as it were in a mass. In those first men- 
tioned they are gummed together in an oblong cluster‘. 
In one Ephemera mentioned by Reaumur¢, they formed 
two oblong masses, each containing from three to four 
hundred eggs, and three and a half or four lines long. 
These animals as soon as their wings are developed eject 
these masses by two orifices, and are aided in the process 
by two vesicles full of air, wherever they happen to alight 
or to fall; in most instances it is the water, their proper 
@ Pirate XX. Fic. 20. > Reaum. vi. 509. ¢. xiv. f. 11, 12. 
© Reaum. vi. 434. a Tbid. vi. 494. 
FQ 
a 
