600 



PUPA OF NECRODES LITTORALIS. 



hind the zygomatic process. * This opening is very large in 

 the common water-rat ; in the beaver the corresponding open- 

 ing is small. 



Art. VI, 



-Description of the Pupa of Necrodes littoralis. 

 By Henry Buist, Esq. 



When collecting insects on the 5th of this month (October) 

 among the sand-hills which stretch along the sea coast to the 

 north of St. Andrews, T picked up the pupa — which I sup- 

 pose to be that of Necrodes littoralis — from which the accom- 

 panying drawings were made. Fig. 1, represents the pupa 

 in its natural position, and shows its under side ; fig. 2, re- 

 presents it spread out in the way that Coleoptera are gene- 

 rally set, and exhibits the upper side. 



74 



Pupa of Necrodes littoralis. 



The pupa is about an inch in length and entirely of a pale 

 white colour ; the head is applied against the breast (fig. 1) ; 

 the antenna} are club-shaped and lie along the sides of the 

 thorax ; the eyes are represented by a patch of a purplish 

 colour ; the thorax is covered with scattered brown hairs, and 

 there are three larger ones of the same colour on each of the 



A similar opening is observable in the skulls of many rodents. 



