300 THE CANADIAN ENTOMOLOGIST. 



special adaptations. In the first stage, Dimorpha has many-haired warts, 

 as shown by my figure in Grote's " Die Saturniiden." I have re-examined 

 the materia], and have no correction to make to the figure. Tubercle vi 

 is clearly absent, while i to v are converted into warts, ii smaller than i, iv 

 and v nearly in line, iv only a little dorsad. On the thorax there are two 

 warts above the stigmatal wart. I do not find tubercle iibj if present, it 

 must be a small rudiment (the larvas are very difficult to examine from 

 their opaque black colour). The arrangement suggests the Lachneid 

 phylum, though the subprimary tubercles are strangely absent, but it does 

 not suggest the Lachneidae nor Liparidee proper, on account of the 

 presence of but two upper warts on the thorax. It is, however, nearly 

 paralleled by the first stage of Bombyx mori, in which the lower of the 

 three thoracic warts (iib) is reduced to a single small hair ; but here the 

 subprimary tubercles are present. Bombyx also resembles Dimorpha in 

 the loss of the tubercles after the first stage and the development of a 

 "caudal horn." Without specimens of Chelepteryx larva, and especially 

 of stage I, it is difficult to get far in comparison with Dimorpha. Scott's 

 figure shows a big Lachneid-like larva, with proportionately small, many- 

 haired warts. Wart ii appears absent, corresponding with its extreme 

 reduction in Dimorpha, but there are two subdorsal warts in line on the 

 thorax, as in the Lachneid phylum, while warts i on joint 12 are separate. 

 The lateral warts are not shown in the figure, but according to the 

 description there is only one wart to represent iv and v, while vi is 

 present. Someone in Australia ought to give us a full account of 

 Chelepteryx. 



Mr. Tutt (p. 272 note) queries what I intended by the primitive first 

 stage in Aglia, stating that it seems specialized to him. Further on 

 (p. 286 note) he says : " We do not agree that Aglia has a primitive 

 first stage." By the primitive first stage I mean that condition in which 

 only the primary setae are present, unmodified, not converted into warts, 

 and without the addition of any secondary set;v. This condition obtains 

 in Aglia, therefore it has a primitive first stage. I do not consider in this 

 definition other specializations of the larva, the hypertrophy of the 

 tubercles, etc. They may be present or not. If present, they naturally 

 constitute a specialization, as Mr. Tutt remarks, but I have not regard to 

 these in this connection. 



On page 364, Mr. Tutt states that I consider the Sphingids, 

 Notodonts and Lachneids related on larval characters, and he designates 



