3/2 LÉPIDOPTÉROLOGIE COMPARÉE 



Dehiscence of pupa. 



When the imago is emerg'ing, there is very little, or no tendency 

 for the pupa to rupture down the thorax; the leg and tongue 

 case cornes off in a mass except for a very little space at the end 

 of the antennas. The imago works its way out of this hole. 



Imago. PL CLXI, No. I5;2. 



The imago émerges naturally several weeks before the normal 

 time of the parents, the following being six dates chosen at 

 random from my spécimens, March 3rd, March gth, March loth, 

 January 24th, March i6th, March loth. 



The ground colour of the insect is very pale ochreous, in which 

 it resembles none of its immédiate allies, although of thèse, it 

 comes nearest Ithysïa italica. However, in colour, it is exactly 

 like Microbiston turanicus (Stgr.), a species it somewhat closely 

 approaches in the directions of the lines. This ground, as in 

 hïrtaria, is more or less speckled with black. Probably the 

 ground colour is a compromise between the somewhat gamboge 

 yellow of English hirtarïa, and the almost white ground of the 

 maie of zonaria. It is slightly nearer hutaria than is hanisoni c?. 

 In shape, the wings are much the same as those of both parents 

 but in the one definite point in which zonarïa is différent from 

 hirtarïa i. c. the somewhat concave costa, it is like zonaria. Pos- 

 sibly, however, the wings, even in proportion, are slightly broader 

 than those of zonaria. 



The first line, which is practically obsolète in zonaria, is 

 strongly in évidence; it is much more curved than the corres- 

 ponding hirtaria line, which is riearly straight as it leaves the 

 inner margin of the wing. After the bend it strikes the costa 

 much more obliquely than in hirtaria. Sometimes, as in the latter 

 species, it may be doubled. The médian line strikes an almost 

 straight line obliquely across the wing and through the cell and 

 shows very little tendency to turn inward as in hirtaria. The 



