1921.] 



R. J. TiLYAKD : Epiuphlcbia laidlaivi. 



97 



tooth placed lower down and somewhat appressed into the space 

 between the bases of the third and fourth teeth of the internal 

 series. In the left mandible (text-fig. i6), the apical series 

 carries three narrow conical teeth on the outside, followed inter- 

 nally by a single large unequally bifid tooth, separated from the 

 rest by a deep notch; the internal series consists of six smaller 

 conical teeth with well rounded apices, all set in a row along the 

 internal edge of the internal lobe of the mandible, from which the 

 apical lobe was torn away somewhat during examination. 



Text-fig. 2. 



II. .\menna ot larva of Epiophlebia laidlnwi n. sp. ; pd, pedicel, sc. scape. 

 b. Part of the labial mask of the same larva, showing a small portion of the 

 mentum, the median lobe with its median cleft, the right lateral lobe and movable 

 hook, and part of the left lateral lobe (displaced), for comparison of its denticula- 

 tion with that of the right side. c. Portion of the gizzard of the same larva, 

 showing five consecutive dental folds, three major and two minor. 



The maxillae have a well developed inner lobe, with five 

 strong teeth ; the palps carry some stiff hairs, and their tips are 

 considerably hardened. 



The labial mask (text-fig. zb) is of the generalised type found 

 in the Gomphinae and Petaliini. The submentum is short • the 

 mentuin somewhat longer than broad, the distal portion squarish, 

 but narrowing towards the base ; a median groove runs up from 

 the base for more than two-thirds the length of the mentum. 

 The median lobe is small, only slightly projecting, furnished with a 



