28 Mr. G. R. Waterhouse's DescrijJtions 



minute and subtruncated. Labium quadrangular, the anterior 

 part narrowest. Insertio longer than broad, narrower poste- 

 riorly. Mentum hexagonal. Mandibles short and stout, the 

 inner side excavated and armed with a large and rather obtuse 

 tooth; the apex of the right mandible (as viewed beneath) 

 deeply notched ; in the left mandible the internal tooth is almost 

 obliterated, and the apex is but slightly notched. Maxilla: 

 elongate, the blade subtriangular, armed internally with a series 

 of bristles and a large corneous tooth-like process. Maxillary 

 palpi 3-jointed; basal joint short; the second moderate, the 

 part at the apex thickest ; terminal joint conic. 

 Body elongate, cylindrical, furnished with six horny legs, which 

 are attached to the three first segments. Telum conical above 

 and excavated beneath. Mesothorax transverse ; the remain- 

 ing joints of the body equal. 



1 a. The larva, magnified. 1 h. Antenna. 1 B. Apex of third joint, at 

 large. 1 c. Labruni. ] d. Ligula. (Newm.) 1 e. Palpiger. (Newni.) 

 1/. Labial palpi. \ g. Labium. I h. Insertio. (Ne\vm.) 1 i. Mentum. 

 1 k, k. Mandibles, viewed from the under side. 1 /. Maxillae. 1 m. Max- 

 illary palpi. 1 n. Fore leg. 1 o. Telum, under side. 



This larva is not very uncommon in the vegetable mould found in 

 decayed oak-trees. 



Obs. — I have given a detailed description of this larva, as I think 

 it may be considered a type of an extensive group, having found 

 several larvae of alHed genera differing so slightly that they might 

 easily be confounded. 



CisTELA Ceeamboides, Linn. 



Larva. Plate IV. fig. 2. 



Length 9 lines. 



This larva so closely resembles the foregoing, both in habits and 

 appearance, that without a minute examination of the trophi I should 

 not have been able to find a distinguishing character. It is, however, 

 destitute of the corneous process on the maxilla ; the labium, also, 

 appears very different to that of Eryx, but the upper portions of the 

 labium possibly have sunk into the insertio, the larva being dry ; 

 though it must be said that the larva of Eryx was also dry. 



My friend the Rev. A. W. Griesbach found a number of these 

 larvae in an old oak-tree between Wimbledon Common and Coombe 



2 a. Maxilla. 2 b. Labium, as it appeared in the larva. 2 c. The upper parts, 

 pulled out. 2 d. Side view of the same, showing the tongue. 2 e. Back 

 view of the tongue. 2 C. The labial palpus at large. 



