196 Sir S. S. Saunders on the adult larvce 



oil the upper or outer region of the thoracical tegument, 

 as in those of the Xenides and their allies (loc. cit. pi. 15, 

 fig. 5); the adult larvae being reversed in all alike. This 

 position the active pseudo-pupa, like that of Sitaris (as 

 described by Fabre in Ann. So. Nat., 4® Serie, Zool., 

 Tome VII. 1857, p. 341), is enabled to change on first 

 detaching itself fi'om the corneous puparium, when the less 

 constricted segments of the Mellifera, and the consequent 

 rotundity retained by the puparia, offer no obstruction 

 thereto; the true pupae themselves having subsequently 

 ceased to move, and exhibiting the same position as in the 

 imago-stage. 



If the anterior segments of the puparium of a Sty lops 

 be longitudinally divided from below by a delicate in- 

 cision, and laid open, the upper or outer unsevered region 

 exhibits on each of the three thoracical segments a pair of 

 transparent circlets, occupying the position of the original 

 lai'val legs [f) ; the first four somewhat approximated on 

 their narrow segments; the other two more remote and 

 wider apart, near the base of the metathorax, in a direct 

 line with the former. The same occurs in Hylechthrus. 

 (Trans. Ent. Soc. Lond., Ser. I., pi. 8, fig. \k). 



On either side of the two anterior pairs of podal circlets 

 aforesaid {f\,f'2), are two polished spaces {x and y ), nearly 

 in alignment therewith ; but the first segment following 

 the head being considerably narrower on either side, these 

 polished spaces are properly ascribable to the mesothoracic 

 and metathoracie regions, corresponding in position with 

 the elytra and wings of the imago. 



Immediately beyond these, occupying a lateral position 

 on either side, in proximity to the second and larger 

 pair of polished spaces (y), is a well-defined bulging 

 corneous infundibuliform process {z), emanating from a 

 speckled circular plate near the anterior margin of the 

 metathorax, and emitting a long and slender tube which 

 extends backwards to the metasternum. These tubes 

 M^ould seem to perform the function of spiracles in the 

 adult larval stage ; the speckled plate covering the orifice 

 being apparently the metapnystega of Kirby and Spence. 



On the opposite region between these spiracles the 

 intervening space is destitute of any trace of functional 

 organization. 



Hence it follows that in the head-caps (thus reversed in 

 situ) the palpi of the imago Stylops are represented by 

 two glossy circular discs (a) near the posterior margin on 



