Alderson: Notes on Chrysopa perla and C. flava. 87 
There are also two similar lines, one on each side of the head, 
running to the eyes. The tibiz appear to be fuscous in shade, 
and give the legs the appearance of having dark bands round 
them. I am unable to say how many changes of skin are 
effected, but I should think, judging from the rate of growth, 
about four or five at the least. At five days old some of them 
appeared to be in their third skin. They are extremely active 
larve, and use the last segment of the body as claspers to 
walk with. 
Rough description at ten or eleven days old :— 
FHlead.—Yellowish. (The characteristic marks had disap- 
peared). 
Lyes.—Black. 
Antenne and Sucking Spears. —Madder brown. 
Body.—Yellowish white; central line and markings crim- 
son; warts on thorax black; side lines crimson. 
The claspers at the extreme end of the abdomen seemed 
very prehensile. Not only did the larve walk by means of 
them, but they also used them as a means of attachment to 
some substance on a change of skin. During this process the 
larva hangs head downwards, attached by the tail, and by 
repeated efforts gradually frees itself from its old skin, the feet 
being disengaged last. In one instance, through my inter- 
ference, the larva became detached, and for a whole day rolled 
about helplessly at the bottom of the box, unable to extricate 
its legs. It fed, whilst in this condition, whenever an aphis 
came sufficiently near to be seized; but after some time, as it 
seemed unable to free itself, I came to its assistance, and with 
a fine pair of forceps liberated each leg separately, when it was 
at once able to stand. 
On August 5th I left home, so on the 3rd I confided the 
larve to the care of Mr. J. T. Houghton, of this town, who 
made the following notes for me during my absence :— 
Aug. 3rd—Received larve. 
»» 5th—QOne seen devouring a larva of Ductyopteryx 
bergmanniana. 
,, 6th—First one pupated in a rose leaf. 
,, 8th—Two more pupated amongst debris at bottom of 
the jar. 
,,  9th—Last one spun up without cover of any kind. 
I kept the jars containing the pupz indoors all the winter, 
and on May 24th, 1906, I discovered at 1-15 p-m. that two perfect 
imagines had emerged, and that a third was half out of its 
1907 March tr. 
