312 Dr. T. A. Chapman on Micropteryx. 



rods as one piece, cutting the opening, and the egg being 

 placed therein from another opening. Further, the rods 

 (bristles) are dorsal to the viscera, certainly to all sexual 

 openings; but Cholodkowsky describes them as ventral 

 to the vagina he describes. This may have been a clerical 

 error : if so, then it is possible that the opening he mentions 

 may have been that of the 8th segment, since it is certain 

 that he overlooked that in the 10th segment (the inner 

 rods (bristles)), viz. the real ovipositor. 



I may refer to Dr. Wood's paper in the " Ent. Mo. Mag." 

 (vol. xxvii, 1891). 



Whether or no the Lepidoptera originated from some 

 form similar to Micropteryx, it probably arose from one 

 with only a terminal female opening, and it seems not un- 

 likely that the second forward opening in the 8th segment 

 arose (in Eriocrania, the forerunner of the Aculeate Lepido- 

 ptera) from the difficult position of the (otherwise) single 

 opening on the ventral surface of a sharp knife. It is, 

 perhaps, going a little beyond the real subject of this paper, 

 but the structure of the female pupa of Lepidoptera shows 

 an opening that is, perhaps, in view of the imaginal struc- 

 ture, most easily described as in the 8th (abl.) segment, 

 but may also be taken to be really in the 10th. The 

 appearance is as though the opening belonged to the 10th, 

 but had somehow been pushed forward, the 10th seg- 

 ment-being continued forward to the posterior angle of 

 the opening, and the 9th impinging on the sides of its 

 posterior half. 



I am not qualified to weigh the possibility of the single 

 (10th segment) opening dividing into two, and the anterior 

 one thus passing forward, leaving its track in the well- 

 known configuration I have referred to, but the pupal 

 appearances strongly suggest it. 



Zeugloptera * seems to be a reasonable name for the New 

 Order which this compels us to recognise, and is suggested 

 by Mr. Durrant. 



The appended photographs of the abdominal segmenta- 

 tion of the abdomen in the females of Micropteryx show 

 that there is no opening in any segment of the abdomen 

 except at the extremity, and that the 8th segment is a 

 well-developed one. Though I have examined scores of 

 specimens and mounted a good many, I find few of my 



* ZeuyXt] = jujlim, Tlrepjv = aid. 



