118 



black abdomen shows likewise at the auterior margiu;> 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 tirst three 

 segments. The third segment has on the dorsum about six macro- 

 chet*. The genitalia are uot visible. The tibiae are dark piceous, 

 nearly black, but rust-brown in transparent light; knees rust-brown. 

 The posterior tibige 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 pulvilli are 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 tegulie are large, pure white, the small halteres 

 yellow. 



NoTp]. — 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 able 

 to ascertain the following : The operculum of the puparium divides in 

 the i^rocess 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 pui^arium, and Sasaki, while (on PI. vi, Figs. 12 

 and 13) correctly representing two i)uparia from the ventral side, has 

 figured the operculum turned around 90 degrees. In Fig. 12 the suture, 

 c. d., appears therefore erroneously on the ventral side of the x)nparium, 

 whereas in reality it runs along the sides of the puparium, and can for 

 this reason not be seen in a ventral illustratiou. In the same way the 

 opened operculum in Fig. 13 is turned around 00 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 larvae 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 

 ex])eriments have been made in .Taiwan with caterpillars in well closed 

 breeding cages; further, although Meinert is likewise of the opinion 



