130 
costa reaches beyond the middle of the wing, the first costal divi¬ 
sion is at most double as long as the second and the fourth vein 
is rather strongly curved at the base; in domestica the costa does 
not reach quite to the middle of the wing, the first costal division 
is more than double as long as the second and the fourth vein is 
less curved at the base ; further domestica seems always to have 
pale hind margins to the abdominal segments not present in Ber- 
(jenstammi. — Also the puparia of these two species are differ- 
ent; they are, to be sure, very similar and both provided richly 
with cuticular processes on the dorsal sur- 
face, but yet they may be distinguished with 
certainty. By examination of the puparia of 
domestica sent me from Dr. Schmitz it was 
proved, that these puparia are identical with 
the puparium described by Keilin (Buli. Sc. 
France Belgique (7), 45, 1911, 47) as Ber 
genstammi , so that the species treated by 
Keilin under that name is in reality dome¬ 
stica. An easily observable difference be- 
tween the two puparia is, that while that 
of domestica has at the lateral margin of 
each segment two papillæ, a small and a 
larger, with bristles oq the apex, there are 
in Bergenstammi on each segment three 
such papillæ, a small, a medium sized and 
Fig. 2. Puparium of P. Ber- a lar g e (F*g- 2 )- 
genstammi. As to the earlier descriptions we now 
gain the following results: Becker had no 
doubt seen the type so we may take his determination for correct 1 ); 
Wood was right in establishing domestica as a new species, and 
his Bergenstammi is no doubt the female of domestica. Malloch, 
who on the cause of a copulated pair united the two species as 
described by Wood, was of course right herein, but as he did not 
l ) It is for the rest curious, that Besker ascribes the female pale hind mar¬ 
gins to the abdominal segments; also his figure of the wing does not 
agree well and is more like domestica ; it would seem not improbable, 
that he had described the female of domestica and figured a wing of 
this species. 
