Publisher: RareBooksClub.com (March 6, 2012)
Format: PDF / Kindle / ePub
Size: 8.6 MB
Downloadable formats: PDF
This old ebook can have various typos and lacking textual content. buyers can obtain a unfastened scanned reproduction of the unique publication (without typos) from the writer. now not listed. no longer illustrated. 1918 Excerpt: ... weeks are required for an entire lifestyles cycle and through the final of August or first of' September, adults of a moment brood look and later move into hibernation. as a result of the prolonged oviposition interval, it's attainable every now and then to discover all nymphal levels feeding jointly. Colonies of early degree nymphs circulate round little or no. Colonies of fourth and 5th degree nymphs circulate round greater than the more youthful ones, most likely as the leaf tissue at one spot is extra speedy exhausted via the bigger nymphs. Egg. size 1/2 mm., maximum width 0.11 mm. form elliptical, broadest one-fourth from basal finish. Base, rounded forming an obtuse attitude. seen from aspect one floor is somewhat concave, the opposite facet progressively rounded. Tip approximately one-half width of egg at basal fourth, with a conical cap, slightly below that's a constriction. Subtranslucent aside from apical part, that's brown. 1st degree Nymph. size 0.51 mm., maximum width particular of spines 0.16 mm. basic form elliptical, aspects marginate. basic colour of dorsal floor brown. high-quality median dorsal line on head and prothorax broadening out right into a spot overlaying many of the dorsal floor of the meso-and metathorax and primary stomach segments. Posterior stomach segments lighter at lateral margins. Proand mesothorax and every belly phase starting with the second one bears a backbone on lateral margin. a couple of spmes on vertex of head, a couple on entrance and a double pair on both sides of an average line on most sensible of head. a mean pair on dorsum of mesothorax and on moment stomach section. 4 median spines in a transverse row bobbing up from tubercles on 5th, 6th and 8th stomach segments. each one backbone tipped with a secreting hair. Eyes pink, now not favorite. Antennae white, one-third size of physique ...