174 BRITISH LEPIDOPTERA. 



dorsum ol the hinder abdominals ; the anal and genital organs 

 clearly, but not deeply, marked. The spiracles are large and well- 

 marked, that on the 2nd abdominal just showing clear of hind- 

 wings ; a moderate-sized slip of the hindwings is exposed, and can be 

 traced to the end of the 3rd abdominal ; the forewings extend to nearly 

 the end of the 4th abdominal, the tips of the 3rd pair of legs 

 concealed beneath them. The antenna-cases are very different from 

 those of pupa of Eutricha quercifolia, being at least twice' as long, 

 extending as far as tip of 2nd pair of legs (about end of 3rd ab- 

 dominal), whilst in E. quercifolia they only reach to about the end 

 of the metathorax ; they are not sharply elbowed, as is often the 

 case in this family ; they taper gradually, and the transverse 

 pectination markings are clear. The metathorax is short (a mere 

 slip), the mesothorax large, the prothorax only about one-half the 

 length of the mesothorax. The dorsal headpiece is of nearly equal 

 length, but much less in width ; the raised ridge on the dorsal 

 headpiece has a backward extension, which is continued more 

 or less prominently, as a mediodorsal ridge down the pro- and 

 mesothorax. The mouth- and faceparts are very clear ; the 

 labrum is central, whilst beneath the labium medially are the labial 

 palpi, and externally to these the maxillae ; on either side of the 

 labium is a small rounded boss, the mandible, and beneath the 

 labial palpi, which are very thin and transparent, are two small 

 triangular prolongations, probably the 1st femora. The glazed 

 eye is very distinct, whilst between it and the labrum and 

 labium is a rather large, bean-shaped piece. There is a 

 great amount of difference between the $ and 2 pupal antennae, 

 not only in width, but also in length, those of the $ extending 

 beyond the 2nd pair of legs, and forming the lowest point of angle 

 between the wing-cases, whilst in the ? they do not extend so 

 far as the 2nd pair of legs, these latter forming the point of the 

 angle between the wings. In the pupae of both sexes of Eut?icha 

 que7xifolia the tips of the antenna-cases only reach as low as the 

 apex of the angle made by the meeting of the 1st pair of 

 legs, about the level of the junction of the 1st and 2nd ab- 

 dominal segments (Bacot). Poulton describes and figures {External 

 Morph. Lep. Pupa, p. 208, pi. xxi., figs. 11 — 13) the terminal 

 abdominal segments of the pupa of Cosnwtrichc potatoria. He 

 notes as follows : 



(1). Fig. 1 1 X 5 \. ?. The last three segments of a ? pupa seen from 

 a ventral and posterior aspect are figured. The anterior generative organ is very 

 distinct and surrounded by lips ; it is placed on the posterior part of the 8th 

 abdominal. The posterior opening is probably represented by the median line 

 immediately behind the anterior opening, but there is another mark placed more 

 posteriorly which may indicate its presence. The posterior end of the pupa is seen to 

 be rounded. 



(2). Fig. 12 x 7.j. cf • The last three segments of a <? pupa seen from a 

 ventral and posterior aspect, but more posteriorly than in the last figure. Hence 

 the division of the 10th abdominal into a ventral or anal (x) and dorsal (x') part is 

 clearly indicated. The latter is entirely without a terminal spine, but is covered 

 dorsally by minute hooks. The anus is nearly terminal. 



(3). Fig. 13 X 50. g . The median ventral area of the <)th and 

 anterior part of the \Oth abdominal segments of the same ( g) pupa, showing the 

 male organ and its relation to the segments. The surface-sculpture is indicated. 

 The male organ is seen to be somewhat a symmetrical, it is surrounded by a thickened 



