66 Bulletin de la Société Entomologique d'Egypte 



IV. The Unfolding of the Wings. 



uJ 



Before llie nioiill, the 

 ^Ying sluin])s looked like 

 lour small strips along the 

 l)ack, but the direction ol" 

 these organs is now altered. 

 This will l)e made clear 

 by comparing ligs. 3 to 7. 



Fig. W is (lra\\n IVom 

 a nearly mature larva and 

 shows the wing stumps as 

 lliey appear before moul- 

 ting. I*'ig. 4 shows the same 

 organs when the unfolding 

 is about to begin. l\elal 

 i\t'ly very short, 1 cm., 

 the slumps, and more espe- 

 cially the hind pair, have 

 deviated from the median 

 line to a consideral)le 

 extent. Moreover it can be 

 seen that, contrasted with 



Fk;. 'A. — l^iiipn sa c(,(i:(t. Male Inrva, ;0 n:ni. h n^ 

 Killed Novendjer 2iul 1917. 



Hudiiueiils ol lorf and tiind wings. 112, 



N.B. The neuialion shown in Ihis sketch is that of the 

 culicular sheatli . 'I'he true wings, which are forming williin, 

 already show many Icdds \isil)le on clearing in Canada 

 balsam. 



