74 



MEMOIES or THE :!^ATIOXAL ACADEMY OF SCIENCES. 



A 



the sack-bearing ^rie/a riridella (fig. 7), which has siiiiilar enlarged dorsal and lateral plates, not 

 only on the thoracic but also on tlie abdoniiiial si'iiinent (lij;'. SI;). 



The i)ui»a of ilepialus is said by Chapman to ditler liom that of Tortrix, 

 "in having the third abdominal segment free, but in a ])eculiar and modi- 

 fied uiauncr," etc. lie does not refer to the inoiirh-parts. I also add a 

 tignre of tlie front of tiie head of the pu|)a of llipinlKs humuli, which, with 

 that of O'Jnotits vlrescens, from New Zealand, 1 owe to the l<iudness of 

 Dr. T. xVlgernon Chapman. The structure of the head is very iteculiar. 

 On the vertex are prominent callosities, giving strength to the head in 

 breaking out of the cell. The eye is large, divided by a distinct line, the 

 outer part of the eye more or less corrugated. Directly under the eye are the 

 large triangular maxillaiy ])ali)i (fig. 31,4 ni.r.p.). The maxilla' themselves 

 are short, but not shown in the figure. The clypeal region is narrow, with 

 tubercles and rugosities; the labrum is scarcely 

 differentiated from the front edge of the clypeus, 

 but is slightly bilobate on the base. On each side 

 are what I call the paraclypeal i)ieces or sdcrites 

 ij).), of the homology of which I am not sure, unless 

 tliey are identical with the tubercles seen in most 

 I.epidoptera on each side of the labrum, and for- 

 merly regarded as the mandibles. It is ])resont, 

 though small and reduced, in llejiialus. Tlie labial 

 palpi {mx.' jj.) are large and wide, and divided at 

 the end. 



Fig. .3I3 rejjresents the head of (Eiiofus rircsrfus 

 Doubh'ilay. The paraclypeal pieces are not ditferen- 

 tiated ; while the labrum appears to be slightly dis- 

 tinct from the clypeus, and excavated in the middle 

 of the front edge, the labial palpi {iii.v.' p.) are very 

 short; the maxillary palpi are as in Hepiahis. 



The underside of the end of the body of this 

 pupa, including abdominal segments 8 to 10, is represented by fig. 31..; on the eighth segment is 

 the well-developed toothed ridge, while each side of the segment is irregularly dentate. On tlie 

 ninth segment (IX) are the rudiments of the male genital opening of the moth, a longitudinal 

 .scar situated between the usual two tubercles, while the vestiges of the anal legs of tlie larva 

 in. /.) are represented by the longitudinal flattened tubercles inclosing the scar or vestige of the 

 anus. 



I have examined the pupa of the Australian Oncopera intricafa (fig. .">3) (in the specimen 

 figured the right antenna- was nearly ob.solete) and of the INFexican PIiatiSK.s triitnf/uhtriti II. hklw., 

 all of which present some remarkable generalized features. In Oncojnra the labial palpi (iiur.') 

 are visible; the entire piece is very wide at the base, and is divided at the middle into the two 

 l)ali)al cases. Between it and the deeply lobed labrum is a piece, unless the two lobes iire the 

 paraclypeal pieces, of the nature of which I am uncertain. Is it the honiologue of the eye collar; 

 and if so, are the two lateral portions the maxillary palpi! The maxilhe themselves {mx) are well 

 develoi)ed, but at their base are divided by an impressed line, representing a portion which I am 

 unable to name. The three pairs of feet are easily identified. Tlie outer division of the eye is 

 large, and the cocoon -breaker, consisting of two solid tliick ridges 011 the vertex, adai)ted for 

 breaking out of its cell in the tree it inhabits, are well marlu'd. Abdominal segments 3-7 are 

 free in the S , and on 3 to (> is a row of spines at each end; on segments 7 and S there are four 

 transverse rows of stout spines, and on !) two rows of small spines. There is no cremaster. On 

 the underside of segment 8 is a row of about fifteen stout spines, and vestiges of three ])airs of 

 abdominal legs are distinct. Tlie pupa is ])i'ovided on the abdomen with a few long seta-. 



The jmpa of Phassns (fig. 34) is lemarkable. Tiie larva boi-es into a very hard tree, according 

 to the late Mr. II. Edwards, who kindly gave me a specimen of the iiuj) 1. The head is remarkably 



Fig. 34.-1*111)0 nl' Phassvs frianinilaris; A, end of Imdy. 



