. British dragonflies (Odonata). Dragon-flies; Odonata -- Great Britain. Li bellII la. Ill greatest breadth, 8mm. Head of moderate size, roughly- pentagonal, transverse width about 6mm. ; rather long from front to back, owing to the extent of mask pro- truding (Fig. 26). Antcniur seven-jointed, the basal two being short and swollen, the rest slender ; of these joints 4 and 5 are short, and 7 is pointed. Mask reaching to between the insertion of the fore- and mid- legs, narrow at hinge, deeply spoon-shaped, and covering the face ; middle lobe and the two })al{3i meeting at a. Fig. 26.—Head of X
. British dragonflies (Odonata). Dragon-flies; Odonata -- Great Britain. Li bellII la. Ill greatest breadth, 8mm. Head of moderate size, roughly- pentagonal, transverse width about 6mm. ; rather long from front to back, owing to the extent of mask pro- truding (Fig. 26). Antcniur seven-jointed, the basal two being short and swollen, the rest slender ; of these joints 4 and 5 are short, and 7 is pointed. Mask reaching to between the insertion of the fore- and mid- legs, narrow at hinge, deeply spoon-shaped, and covering the face ; middle lobe and the two })al{3i meeting at a. Fig. 26.—Head of Xvmph of Libellula quadrimaculata. (Much magnified ; hairs omitted.) point in the front of the head ; palpi triangular, serrated where they approach in the mid-line, and hairy along the outer margin ; two half circles of hairs on the body of the mask on the upper surface behind the insertion of the palpi ; front border of mask produced in a rather obtuse angle. Eyes at the lateral corners of head small, rounded, with a prolongation almost perpendicularly backwards towards the mid-line of the head. Top of licad convex. Vertex somewhat raised. Oeeiput rather narrow in centre, nearh" rectangular, hair}- ; hind margin. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lucas, William John. London, L. U. Gill
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondo, bookyear1900
