70 



MEjrOIES OF THE XATIOXAL ACADEMY OF SCIENCES. 



Fig. 29 represents the jjupa of Thyridopteryx ephemeraformis, and its close resemblance to that 

 of Oncopera intricata (fig. 33) will be seen iu the presence of the large iiiece betwoon the base of 

 the iiiaxillarv palj)!. Iu n^rcticiis alihof i i (fiff. l2.S) the niaxillaiy palpi arc separated by the second 

 maxillary (labial) palpi. Tlie former (w.r. 7>.) is subdivided 

 into an inner and an outer small lobe. Iu the Psychida' the 

 paraclypcal pieces, or tubercles, as we might call thcui, are 

 always present. They are convex and ^■ery rugose. The 

 labial or second maxillary piece in the Australian Jjumetopa 

 ignohilis is of the same shape and sculpturing as iu rxyclie 

 graminella, but the large, round, rugose i)ieces on each side, 

 or first maxillary palpi, are single, not divided into two 

 parts, unless tlie irregularly trapezoidal jueces between the 

 maxillary i)alpi and the eyepiece be the homologue of the 

 outer portion. 



In the Australiau Metura ilonyata (fig. ;>0) the short 

 reduced labial i)alpi are much as 

 in Pftyche (jramhuUa, but are more 

 deei)ly divided. The two divisions 

 I am iucliued to consider as the 

 second nuixillary (labial) palpi. In 

 this genus the first maxillary palpi 

 are also as in I'syche gramineUa. 



It will then be seen that in the 

 pui)a of this family the first and 

 second maxillary palpi varj- \ery 

 much iu form, as they probably do 

 iu the imagiues, being more or less 

 atroiihied iu the latter, where they 

 need to be carefully examined. On 

 the other hand, the maxil]:e tliem- 

 selves (for iu their pujial condition 

 iuhaustel]ateLe])idoptera they have 

 retained the separated condition of 



those of the laciniate Lepidoptera), though short, are (|uite i)ersistent in 

 form. 



The pupa of Platmceticus ghrerii differs from that of (Eceiicus uhhotii 

 in the undivided first maxillary i)alpus (eyepiece) and the elongated 

 second maxillie, as well as the narrower clypeal region, and the lack of 

 a cocoon or case-opener. 



By an examination of the figures it will be seen that 

 the outer division of the eyepiece varies much iu size. 

 This is due to the varying width of the male auteunie, 

 which, when wide, as in Pinara (Entometa), ]\Ietrua, Tliy- 

 lidopteryx, and I'ysche overlap and nearly conceal it, 

 while it is entirely hidden in Platceceticus. On the other 

 hand, in male ])ui)a' of llepialus and Oneojiera, where the 

 antenna' are small, narrow, and not pectinated, these 

 pieces are large. The end of the body has no cremaster, 

 but, what is unique, a hook arising from each vestigial 

 anal leg. 



Finally,itwi]lbereaddy seen that from an examination 

 of the pui)a' the views of S])eyer, of Chapman, and of Comstock, as to the position of the I'sychida;. 

 is fully confirmed, while I sliould go a little fnither and i)lace them still nearer the IIepialid;e. 

 They are, however, still more modified than this last-named gi'ou]), since the females are wingless 



h. cocoon- 



Fig. 29. — Vup•^^)i Thyndoptcnjx eiihenn'rtvfnrniis, / ; 

 A, nU\c view of end of body, showiiis; one of tim (wo 

 termiual hooka ; vestiges of 3 pairs of ubdoniinal legs. 



