LÉPIDOPTÉROLOGIE COMPARÉE 359 



whereas, in zonarïa, there are distinct breaks in the medio dorsal 

 line and just before tiie spiracular area is reached. However, the 

 small spot, between the end of a bar and the large spot, is provided 

 with a slight tail and is displaced obliquely, thus causing the faint 

 supraspiracular stripe to be more conspicuous just as in zonaria 

 larvie. The other longitudinal Hnes of zonaria are quite visible 

 in the hybrid larvaa — much more so than the corresponding 

 lines are in hirtaria. The spiracular line, under a lens, is not at 

 ail continuous and is not broad as in zonaria. As a matter of 

 fact, it is composed of the white spot common to both hirtaria 

 and zonaria, with a strong prolongation behind and downward, 

 and a fainter spot before. It is more like that of hirtaria in shape 

 but is primrose yellow in colour like zonaria. This line is stron- 

 gest on the first 5 abdominal segments but is présent, with the 

 spot, in a modified condition, both on the thorax and on the last 

 abdominal segments. 



The collar is formed of a séries of white spots placed at the 

 ends of the longitudinal lines, and is thus interrupted as in 

 zonaria, although the spots tend to fuse into a continuous line 

 except on the medio-dorsal area. 



riie anal plate is not large; it is tipped with setae and is obscu- 

 rely paler at theedges. The two white spots before this, bearing 

 two ot the primary tubercles, are présent as in hirtaria. 



V^entrally, we hâve indications of the two medio-ventral lines of 

 zonaria, which, as in that species, are clearer on the subsegments 

 of the larva that bear the white transverse bars. 



The legs and prolegs are blackish and at the base of the legs 

 we hâve a narrow white bar. 



The primary tubercles are black, tcnding to be paler ringed. 

 The bristles or setae are very weak. 



2nd INSTAR. 



Length at the end 7 to 7,5 mm. 

 Zonaria larva, in this instar, somewhat approximates its adult 

 shape and there fore differs from hirtaria larva in being shorter 



