LÉPIDOPTÉROLOGIE COMPAREE 39I 



is very close to pomonaria. This white spot is folîowed in both 

 parent forms by a large white spot on the spiracular Une which 

 in pomonaria, is sometiines yellow tinted and in shape, quite oval; 

 in hirtaria it extends somewhat broadly and clearly anteriorly 

 and more f aintly behind. Pilzïi shows no tendency to form a spi- 

 racular stripe. The large white spot in hirtaria appears in the 

 thorax, and may appear on the last abdomnial segments, but, in 

 pilzii, vve hâve the barest indications of thèse. In pomonaria, they 

 are totally absent. AU three tend to develop the longitudinal 

 stri^-es toward the end of the instar. Before the anal plate in 

 hirtaria and pilzii, are two white dashes which are absent in 

 poiuo7iana. 



The coUar is white and nearly continuous like that in hirtaria. 



The ventral area, as well as the legs and prolegs, is blackish 

 except for slight traces of the white marks on the legs such as 

 are seen in hirtaria. 



2nd INSTAR. 



Length at end 8,7 mm. 



Head. The head is black, like that of both parents. In size, 

 it is slightly iarger than pomonaria. It has a few short bristles 

 on the usual places. 



Body. The ground colour is still quite blackish and the arran- 

 gement of transverse bars and spots, which almost makes a 

 semicircle on pomonaria and hirtaria, is now yellowish as in those 

 species. The sole différence between the semicircle m thèse is the 

 smallness of the supraspiracular spot in pomonaria — a character 

 that is transferred to pilzii. Perhaps, too, the bars are narrower 

 in pomonaria than in the hybrid and hirtaria larvae. In that 

 species, too, the pale longitudinal stripes are very weak and in- 

 distinct ; they become more visible in hirtaria and pilzii especially 

 after the bars. 



In ail, the coUar is well developed, although that in pomonaria 

 is less dot-like and more continuous than in hirtaria. In this, 



