Dorothy J. Jackson 279 



head differs in colour from that of the adult. The sides of the epicranium 

 and the genae or cheeks are dark brown, as is the gular plate. The frons 

 and the dorsal part of the epicranium being colourless and transparent, 

 these ventral parts appear conspicuously through the dorsal surface. 

 The dark brown area is continued as a narrow strip round the posterior 

 edge of the epicranium. The mandibles and epistome are very light 

 ochreous brown. The antennae are relatively very much larger as com- 

 pared with those of the adult larva. As in the adult, no eye spots are 

 present. Measurements of the newly hatched larvae are as follows: 

 length of body including head. 0-97 mm. to 1-1 mm.; breadth of body, 

 0-279 mm.; length of head, 0-182 mm. to 0-198 mm.; breadth of head, 

 0-163 mm. to 0-173 mm. 



The Pupa. (Plate XVII. Head of Pupa, Plate XVI.) 



The pupa is soft, very easily crushed, creamy white in colour, with 

 more or less conspicuous bristles upon the dorsal surface. It varies in 

 length from under 4 mm. to over 5 mm. The head is bent beneath the 

 prothorax and is therefore not visible when the pupa is viewed dorsally, 

 only the two prominent bristles upon the vertex, and the distal portion 

 of the antennae, curled round at the sides of the pronotum, being 

 apparent. The head bears three pairs of prominent capitate bristles, each 

 ending in a hooked point, the larger ones arising from distinct conical 

 swellings, and some pairs of smaller bristles are also present. The pro- 

 notum is provided with a number of moderately long bristles of which 

 the majority are non-capitate. The mesotergum bears on either side of 

 the middle a group of four bristles, some of which are swollen at the tip. 

 Occasionally there are two short bristles anterior to these groups situated 

 one on each side of the median line. The metatergum bears a somewhat 

 similar group of three to four bristles and has occasionally two bristles 

 anterior to these as on the mesotergum. The bristles on the thoracic 

 segments arise from slight elevations. There are ten abdominal segments. 

 the tenth being extremely small and the first eight bear bristles which 

 are arranged in the form of a single transverse row on the posterior 

 portion of each segment. They are much shorter than the bristles of the 

 thorax and slope towards the posterior extremity of the body. They are 

 borne upon distinct paplike elevations, which become more marked on 

 the posterior segments. The number of bristles upon the abdomen vary 

 in different specimens but on segments 1-7 the number is usually eight, 

 made up of one pair of dorsal bristles, two pairs of lateral bristles, and 

 one pair of pleural bristles, but in some specimens there are six more 



