118 
black abdomen shows likewise at the anterior margins of the segment 
a whitish (in the ¢ more yellowish) tinge of wide extent, which, at the 
median line, is interrupted by a black, narrow longitudinal stripe. The 
yellowish-red maculation of the ¢ occupies the sides of the first three 
segments. The third segment has on the dorsum about six macro- 
chete. The genitalia are not visible. The tibie are dark piceous, 
nearly black, but rust-brown in transparent light: knees rust-brown. 
The posterior tibiz have on their upper side very densely placed cilia, 
not mentioned by Sasaki, who also incorrectly figures the bristles on 
thorax and abdomen. The claws of the ¢ are rusty-yellow, black at 
tip: the black portion of the anterior claws appears to break off easily, 
since it is wanting in my specimen. The female has the claws black 
and more persistent. The pulvilliare rusty yellow. The wings are fus- 
cous. and along the longitudinal veins rusty brown, the curvature of 
the apical transverse vein [Spitzenquerader] is nearly rectangular, the 
posterior transverse vein is only above the fifth longitudinal vein a little 
curved: there are from two to three bristles at the base of the third 
longitudinal vein. The tegule are large, pure white, the small halteres 
yellow. 
NotEe.—In regard to the puparium, Mr. Sasaki has made a quite im- 
portant error to which Professor Brauer had previously called my atten- 
tion. By an examination of the puparium itself I have now been see 
to ascertain the following: The operculum of the puparium divides in 
the process of opening into two halves, a lower and an upper one. a 
longitudinal furrow, running over the anterior terminal point of the 
puparium and extending on each side as far as the anterior margin of 
the metathoracic segment (the fifth segment, according to Sasaki), shows 
the mode of the future splitting of the operculum. This furrow runs 
along the sides of the puparium, and Sasaki, while (on Pl. vi, Figs. 12 
and 13) correctly representing two puparia from the ventral side, has 
figured the operculum turned around 90 degrees. In Fig. 12 the suture, 
¢. d., appears therefore erroneously on the ventral side of the puparium, 
whereas in reality it runs along the sides of the puparium, and can for 
this reason not be seen in a ventral illustration. In the same way the 
opened operculum in Fig. 15 is turned around 90 degrees. The two 
small circles on the ventral side of the fifth segment in both of the fig- 
ures just cited are not stigmata, as stated by Sasaki in his descriptions, 
but small warts which originate in the puparium. 
Finally, I desire to call attention to Sasaki’s remarkable observation, 
according to which the eggs are deposited by the fly on the under side 
of the mulberry leaves: that they are eaten by the silkworm with the 
latter, and that they develop afterward to young larve in the intestinal 
canal of the caterpillar. Although Sasaki has established the identity 
of the eggs on the leaves with those in the vagina of the fly; although 
experiments have been made in Japan with caterpillars in well closed 
breeding cages; further, although Meinert is likewise of the opinion 
