12J 



PSYCHE. 



[January — Febrxiari- iSS4- 



liead ;uk1 the first scgiiiciit. wliicli ;iic :i 

 pale, yellowisli brown. The first seg- 

 ment is leatlierv and smootli above, and 

 as long as the two following together; 

 but each of the remaining eleven seg- 

 ments is marked on the back by about 

 three transverse dorsal folds, wliicb ter- 

 minate on the sides in large, low eleva- 

 tions, pointed-ovate in form (the pointed 

 ends being upwards), one to each seg- 

 ment of the bod\ except the first and 

 the last. 



The first spiracle is larger than tiie 

 remaining eight, ami jjlaced between the 

 first and second thoracic segments. The 

 others arc situated at the lower ends of 

 the ovate elevations mentioned above, 

 and just within a tortuous longitudinal 

 groove, which separates these elevations 

 from a series of prominent tubercles 

 which extend along the sides, one tuber- 

 cle to each segment, ."^till beneath the 

 first mentioned row of tubercles is an- 

 other longitudinal groove, and a second 

 series of tubercles ; and these again are 

 separated from the transverse ventral 

 ridges bv still anotlier irregular longi- 

 tudinal groove. Finallv. the ends of 

 these ventral ridges are cut otl' ol>li(jue- 

 1\ In a series of grooves, each extend- 

 ing from before back\vards and inwards, 

 thus forming a fourth series of eleva- 

 tions, on a line with the legs. 



In Colaspls. the elev-ations of tliis 

 last series have the form of thick, 

 fleshy tubercles which project down- 

 ward beyond the general ventral surface, 

 each bearing about ten hairs of varying 

 lengths, the three or four longest of 

 which are longer and stouter than anv 



others on the larva. The hairs on the 

 ventral ridges between these tubercles 

 form an unbroken row. The\' are about 

 nine in number, alternately longer and 

 shorter, with very many short ones inter- 

 mingled : the longest being about as 

 long as the corresponding segments. 

 The twelfth \entral segment (fig. /E) 

 is deeplv and widely emarginate pos- 

 teriorlx'. dlyided. in fact, into two 

 triangular plates, between which the 

 unusually developed thirteenth segment 

 appears. These lateral plates are fringed 

 \vith spines on the posterior two-thirds 

 of their inner margin. The thirteenth 

 or anal segment is likewise longitudi- 

 nally divided beneath. 



Tiiese two segments taken together 

 are about one and a half times the length 

 of the preceding one ; and their dorsal 

 arches are likewise relatively elongate, 

 being scarcely, if at all. shorter than 

 the next segment in advance. 



The legs are about as long as the tho- 

 racic segments to which they are at- 

 tached, and are white, with the excep- 

 tion of the clayvs. which are dark brown 

 at the tips. They are provided with a 

 few slender white hairs, which become 

 shorter anil more spine-like toward the 

 end of the leg. 



The head is smoolli. somew iiat flat- 

 tened in front, with a tew slender, scat- 

 tered hairs. The clypeus is trapezoidal. 

 and the anterior edge of the labruni 

 (fig. 7D) is convex. The antennae 

 (fig. 7A) are situated just outside the 

 bases of the nianilibles. They are mi- 

 nute, w hite. four-jointed, the two basal 

 joints short and cpiadrate. the second 



