Monograph of the Coccid of the British Isles volume 1
Monograph of the Coccid of the British Isles volume 1
Robert Newstead
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4) with five groups of circumgenital glands; anterior group arranged in a single concave series ; anterior laterals usually forming a pyriform group ; posterior laterals usually in a more or less circular group. Formula of six examples : 675767 1214 . 1411 . 1312 . 1712 . 1212 . 119 8 9 . 9 9 . 10 8 . 911 . 7 9 . 108 Anus considerably above anterior grouped glands. Vaginal opening immediately below the posterior lateral groups. Subdorsal groups of tubular spin- nerets occupying same position as... in M. Pomorum. , but shorter and a little more defined. Seven marginal tubular spinnerets on each side of the centre, very large, the first singly between the median and second lobes ; the rest in pairs. Median lobes narrower, more at- tenuated at the base than in M. Pomorum; lateral margins sloping and extending within the body- wall, more irregularly dentate or bluntly serrate ; posterior margin lobate ; second and third pairs of lobes, placed together, have the posterior margin rounded, and some- times with a faint lateral notch.
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