PARACOROTOCA AKEKMANI (wARREN). 349' 



the suboesophageal than in the imago. The prothoracic and 

 mesothoracic ganglia are subeqiial in size, and are joined 

 together by a pair of quite separate, longitudinal connectives. 

 The metathoracic ganglion is smaller than the mesothoracic, 

 and the connectives between them, just as in the imago, are 

 longer than those between the mesothoracic and prothoracic 

 ganglia. The cortex development is weak (PI. XXI, fig. 92). 



There are eight abdominal ganglia, but these are pushed 

 forwards out of their proper segments, and the pairs are 

 placed progressively nearer to each other on passing back- 

 wards. Thus the longitudinal connectives are practically 

 absent between the last three pairs of ganglia. The first 

 abdominal ganglia are close to the metathoracic, and the 

 eighth lie between segments V and VI (fig. 92). This 

 forward contraction of the abdominal chain foreshadows 

 the fusion of the abdominal ganglia in the imago. 



The Fat-body and Blood-tissue. — The head and 

 thorax of the larva are distinctly broad, while the abdomen 

 is clearly physogastric. None of the internal organs, except 

 perhaps the mesenteron, can be regarded as lijqDertrophied, 

 but the fat-body is greatly developed in all parts of the 

 body. The fat-cells are mostly arranged in bulky lobules, 

 they are very large and cany numerous fat-globules, while 

 the nucleus is small and often somewhat stellate or polygonal 

 (PL XX, fig. 89). In tlie imago the fat-cells consist of a 

 much denser protoplasm, the nuclei are rounded or oval and 

 larger, and the fat is not carried in the form of discrete, 

 rounded globules (PI. XIX, fig. 59, /. h.). In many parts of 

 the body of the larva there is a distinct tendency for the fat- 

 body to be separated from the hypodermis by a layer of 

 blood containing a few perfectly rounded blood-cells. This 

 character is presented in a marked degree in the exudatory 

 organs or lateral outgrowths from the abdominal segments 

 (PI. XXI, fig. 93, ex. 0.), The cuticle of these outgrowths is 

 very thin, and in the distal half there is a considerable blood- 

 space immediately beneath the hypodermis. The Malpighian 

 tubes are surrounded by blood-spaces (fig. 93). 



VOL. 4, PART 2. 24§ 



