Araneus boreus n. sp.
Holotype (_??_): Yukomanbetsu, Mt. Daisetsu, Hokkaido, 10-VII-1970, Y. Nishikawa, Y. Tarumi and A. Noto collectors.
Total length 9.5mm; carapace 3.7mm long, 3.2mm wide; abdomen 7.0mm long, 6.3mm wide.
Cephalothorax longer than wide, covered with white hairs on the brown ground. Head narrower than thorax (2:3), with parallel sides. A bottle-like black fleck is in front of the transverse median furrow, and eight pairs of small black flecks scattered around it. Cervical grooves convergent posteriorly, but their ends do not meet with each other. Median furrow evident. Eyes arranged typically as seen in other species of Araneus. Anterior eye row slightly recurved seen from front; posterior row procurved seen from above. Lateral eyes of both rows separated widely from middle eyes. Median ocular area wider in front than behind (3:4.5), as long as wide. Clypeus less than the half the length of median ocular area. Palp whitish green with a black ring fleck at the end of each segment. The apical segment black with many spines. Chelicera stout and black, having a conspicuous whitish green fleck furnished with white hairs on the base of its prosurface. Fang black. Four teeth on the promargin of fang furrow, three teeth on the retromargin. Maxillae yellowish white in the anterior half, black in the posterior half; their inner sides white and divergent anteriorly. Labium semicircular in shape, wider than long (34: 21), black with white anterior edge. Sternum long cordate, procurved in front, pointed behind, black with a yellow longitudinal fleck in the median line. Coxae and trochanters of legs similar to sternum in colour. Leg formula 1243. The measurements are shown on page 10. Abdomen globular, whitish green in colour, with a pair of bat-like black fleck and a black folium pattern. Both sides black. Venter black with two pairs of yellow round flecks near the spinnerets. The both sides grayish green. Spinnerets black. Epigynum with a long soft (not so strongly sclerotized) scape crooked at base.
