June, "15] 



MOZNETTE: THE BROWN LACE-WING 



353 



The pupa is a light browTi in color, the thoracic and abdominal regions bearing the 

 same characteristic markings as are found in the larva. It is somewhat cylindrical in 

 shape curved and with the limbs and wings folded to the breast. The wing 

 pads are at first white changing to a hght amber in color. The antennae are now more 

 or less clavate. the segments not distinctly bead-like. The eyes are very prominently 

 black. It measures 4 mm. in length. 



The insect on emerging from the cocoon ruptures one end, and the 

 pupa apparently cuts its way out of the cocoon as the pupal skin is 

 cast outside. The length of the pupal stage is fifteen days. 



The adult is distinctly light brown in color, lighter at first, changing gradually to a 

 darker shade and is covered with short hairs. The head is small and pale in color. 

 The eyes are prominently black. There is a browri band below each eye. The an- 

 tennae are moniliform or bead-like in form. There is a browTi line at the base of each 

 antenna. They are pale amber in color. The thorax is pale and hardly brown. 

 The legs and abdomen are a little darker. Wings hyaline, the venation is somewhat 

 pale marked with brown spots which are darker at the base, rising from these spots 

 are indistinct oblique clouds. The gradate veins are mostly brown clouded forming 

 an indistinct band. Along the border are groups of brown spots and the pterostigma 

 is indistinct. The costal space is narrow toward the base and the median is much 

 bent toward cubitus at connecting veinlets. Three radial sectors, the upper branch 

 of the third forked before the inner gradate series, lower simple. Last gradate 

 veinlet of inner series is distinctly beyond the previous one. Hind wings white with 

 pale veins except few outer gradate ones. Expanse 18-21 mm. 



When at rest, which is usually during the day, the wings are held 

 roof-like over the body. I have observed but few on the wing during 

 the day and then only when disturbed from their place of rest. Their 

 flight is slow and sluggish. When confined in breeding cages they do 

 not live more than three or four days. 



Records of the feeding of five Hemerobius larvae are given as follows: 



Aphids Eaten by Hemerobius Larv.«; 







Number Aphids Devoured per Day 



Total 

 Aphids 



De- 

 voured 





Larva 

 No. 



Hatched 



Dec. 11 



Dec. 12 



Dec. 13 



Dec. 14 



Dec. 15 



Dec. 16 



Dec. 17 



OO 



Q 



Dec. 18-19-20 

 in Cocoon but not 

 Pupa until 

 Dec. 22-23-24 



Average 

 per 

 Day 



1 



Dec. 10 



10 



26 



24 



25 



26 



24 



29 



32 





196 



24 







9 



Dec. 10 



1.3 



27 



28 



27 



29 



23 



28 



29 





204 



25 











3 



Dec. 10 



19 



29 



28 



29 



30 



25 



26 



30 





216 



27 









4 



Dec. 10 



12 



26 



27 



28 



25 



24 



28 



31 





201 



25 

















5 



Dec. 10 



10 



23 



23 



24 



26 



23 



29 



33 





191 



24 











