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thorax, the other ten the abdomen. The thoracic segments are larger 

 than the abdominal ones. The first segment of the thorax is more 

 flattened dorsiventrally than the others and bears on its dorsal surface 

 a rectangular patch covered with a felt of fine reddish-brown hairs. 

 The 8th and 9th abdominal segments are much smaller than the others. 

 In a ventral view (Fig. 7) the 10th or last segment is seen to consist of 

 four distinct lobes around the anus. Spiracles, circular in shape, are 

 present on the first thoracic segment and the first eight abdominal ones. 

 The length of the full-grown larva is, on an average, 2-25 mm. 



Head of Larva (Fig. 4). 



With the aid of a binocular microscope the following parts can be 

 made out in a dorsal view, 



Fig. 4. Head of larva of C. abidis seen from above (greatly magnitied). 



Most anteriorly lies the labrum (/.) or upper lip which bears a number 

 of fairly strong bristles on its front margin. Posterior to the labrum lies 

 the clypeus (c.) while still further back may be seen the epistome (£".), 

 a thickened band of chitin carrying a few strong bristles and forming a 



12—2 



