. Annals of applied biology. Biology, Economic; Biochemistry. 306 Habits of the GreenJiotfse White Fhj because of the contrast. Each eye is completely divided into two parts, each of which appears to consist of a single ommatidium. The larva is 0-29 mm. long, transparent, with a pair of dark yellow masses (present in all stages) in the abdomen, generally in the three or four anterior segments, but sometimes extending into the thorax. This pair of yellow masses is the mycetoma, or pseudovitellus. The segmentation of the abdomen is not distinct until a few minutes after emergence, when the chiti
. Annals of applied biology. Biology, Economic; Biochemistry. 306 Habits of the GreenJiotfse White Fhj because of the contrast. Each eye is completely divided into two parts, each of which appears to consist of a single ommatidium. The larva is 0-29 mm. long, transparent, with a pair of dark yellow masses (present in all stages) in the abdomen, generally in the three or four anterior segments, but sometimes extending into the thorax. This pair of yellow masses is the mycetoma, or pseudovitellus. The segmentation of the abdomen is not distinct until a few minutes after emergence, when the chitin has hardened. There are six abdominal segments, but no differentiation in the thorax. The body margin has a series of spines (Fig. 6), fifteen pairs of which would seem to be segmentally arranged, since they are so arranged in the abdomen. Between the posterior two pairs is a pair of much longer spines; and posterior to all of these are the very long cerci (Fig. 7).. Fig. 7. Lateral view of hind end. This larva is active for about three days, during which time it wanders about the under-surface of the leaf. It thus differs from some other species in which the larva simply gets clear of the egg before settling. Previous to settling down, or at about this time, the spaces between the marginal spines become filled in with wax formed by marginal wax glands. The larva prefers a position alongside one of the leaf veins, and since the site it occupies is retained by the later instars, which are sedentary, the choice of this first larva is important. The waxy fringe is much wider in this stage than in the succeeding 02ies, and it gradually narrows in the succession. Behind the sixth abdominal segment, dorsally, is the vasiform orifice, the consideration of which I leave till later. Legs and antennae are functional during active life, and are well developed com])ared with those of the three later stages. Mouth jHirls. Tlicte is a veiv short lostrum situated between the anterior legs.
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