7 
NEW HYBRIDS IN THE BISTONINA. 17 
with an enormous mass of observations which awaits publica- 
tion, and is held up owing to the war. A very brief résumé 
of these results is therefore given here in order to clear 
the air, as it were, for this year’s experiments, which have 
already commenced. Although three of the hybrids have been 
discussed to some extent in ‘ Lepidopterologie Comparée,’ fase. vil, 
they are included here, as that work is not generally accessible 
to English readers. 
(a) Primary Hysprips. 
(1) Lycia hyb. bulovei=L. hirtaria $ x Ithysia grecaria 2 . 
(‘Lep. Comp.,’ fase. vii, p. 120). 
Like all other hybrids, in which a male of the genus Lycia 
and a female of the genus Ithysia are involved, this hybrid only 
exists in the male sex. 
(2) Lyciahyb. arethusa = L.lirtaria 3 x Pecwlopsis isabelle @ . 
Both sexes are produced, and in equal numbers. 
(8) Lycia hyb. wallacet= Lycia hirtaria 3 x Pecilopsis lap- 
ponaria & . 
This likewise produces the sexes in equal numbers. The 
females are rather like those of the cross between hirtaria and 
zonaria. 
(4) Lycta hyb. fletchert = L. hirtaria 3 x P. rachele?. 
Interesting as being a cross between a Canadian species and 
a European one. Called after the late Dr. Fletcher, Dominion 
Entomologist, who introduced me to the species rachele. 
(5) Pecilopsis hyb. gibsoni = P. rachele 3 x zonaria °. 
Of the same nature as the last form. Named after Mr. 
Arthur Gibson, Assistant Entomologist, who has assisted me 
with ‘“‘ raw” material for my experiments. 
(6) Pecilopsis hyb. marguerite = Pecilopsis pomonaria 3 x 
Pecilopsis rachele @ . 
(7) Pecilopsis hyb. henrict = P. isabelle § x P. rachele?. 
These two forms are named after the children of a friend who 
has been of invaluable assistance in getting me material—help 
which, I hope, will be continued after the war. 
(8) Pecilopsis hyb. christiane = P. pomonaria $ x P. isa- 
belle 2 . 
Produces both sexes, and in approximately equal numbers. 
(9) Pecilopsis hyb. robsoni = P. isabelle 3 x P. pomonaria & . 
Like the last, has both sexes in equal numbers, but is much 
more prone to ‘‘ lying over.” 
(10) Pecilopsis hyb. heslopt = P. pomonaria 3 x P. lappons 
aria? . 
A sturdy and strong hybrid with both sexes and, in spite of 
its parer tage, showing no signs of lying over. 
(11) Jthysia hyb. criddlet = I. zonaria xP. rachele 2 . 
