. Annals of applied biology. Biology, Economic; Biochemistry. i'7s Bionomics of WeeriU body is cylindrical in shape and tapers slightly towards the extremities. It is usually bent in a curve. It is creamy white in colour, soft and fleshy, and there are many transverse wrinkles on the back dividing the segments up into folds. These folds bear various reddish brown bristles which are constant in number and position in this species. The head is comparatively small, measuring 0-635 mm. long by 0-62 mm. broad. The frons and epicranium are deep ochreous in colour, becoming darker in colour towards t
. Annals of applied biology. Biology, Economic; Biochemistry. i'7s Bionomics of WeeriU body is cylindrical in shape and tapers slightly towards the extremities. It is usually bent in a curve. It is creamy white in colour, soft and fleshy, and there are many transverse wrinkles on the back dividing the segments up into folds. These folds bear various reddish brown bristles which are constant in number and position in this species. The head is comparatively small, measuring 0-635 mm. long by 0-62 mm. broad. The frons and epicranium are deep ochreous in colour, becoming darker in colour towards the epistome which is reddish chestnut. The jaws are prominent, dark reddish brown. The antennae are extremely small, two jointed. There are no eyes. The body is divided into segments, of which there are three thoracic and ten abdominal, but the last abdominal segment is very small. Along the side of the body is a con- spicuous longitudinal fold, the epipleural fold, above which the spiracles. Fig. '.\. Newly hatched larva of Sitones lineatus L. Dorsal view 94. A = antenna; M = mandible; MX = maxilla. are situated. The spiracles are nine in number; the first pair is situated between the prothorax and the mesothorax, the remainder are situated on the abdominal segments 1 to 8. It is intended to give a more detailed description of this larva in a subsequent paper dealing with the comparative anatomy of the larvae of the injurious species. The Newl?/ Hatched Larva. (Fig. 3.) The newly hatched larva differs from the adult larva in the following points. It is much more active and quick in its movements. Its bristles both on head and body are proportionately very much longer and in- crease greatly in length towards the end of the body. Their arrangement appears to be much the same as in the adult, but the lobes of the body on which they occur are not clearly represented. The spiracles are cora- paratively large and situated in the same position as in the adult. The. Please note that t
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbiochem, bookyear1921
