. British journal of entomology and natural history. Natural history; Entomology. BR. J ENT. NAT. HIST., 9: 1996 3 Donacia versicolorea (Brahm) .$. VICE-COUNTY DISTRIBUTION. PRE 1970 (= 34): 9; 10; H; 12; 13; 14; 15; 17; 18; 19; 20; 22; 23; 25; 26; 27 29; 32; 33; 34; 38; 41; 46; 48 55; 59; 62; 66; 70; 72; 91; 92 94; 110. 1970 ONWARDS (= 29): 1;11;13; 14; 15; 17; 18; 20; 22; 23; 27; 31; 32; 34; 38; 41; 44; 45; 46; 52; 53; 54; 64; 75; 80; 98; 104; 108; 110. 1970 ONWARDS 4. Donacia crassipes Fabricius, 1775 Status: Notable B (Latin: crassus, thick, gross; pes, a foot, probably referring to the en
. British journal of entomology and natural history. Natural history; Entomology. BR. J ENT. NAT. HIST., 9: 1996 3 Donacia versicolorea (Brahm) .$. VICE-COUNTY DISTRIBUTION. PRE 1970 (= 34): 9; 10; H; 12; 13; 14; 15; 17; 18; 19; 20; 22; 23; 25; 26; 27 29; 32; 33; 34; 38; 41; 46; 48 55; 59; 62; 66; 70; 72; 91; 92 94; 110. 1970 ONWARDS (= 29): 1;11;13; 14; 15; 17; 18; 20; 22; 23; 27; 31; 32; 34; 38; 41; 44; 45; 46; 52; 53; 54; 64; 75; 80; 98; 104; 108; 110. 1970 ONWARDS 4. Donacia crassipes Fabricius, 1775 Status: Notable B (Latin: crassus, thick, gross; pes, a foot, probably referring to the enlarged hind legs). L = mm; Plate I, Figure 4. One of the larger British Donaciinae, this local species is associated with waterlilies (both Nymphaea alba L. and Nuphar lutea (L.) Sm.) growing in lakes, ponds, rivers and canals. The adults, which appear at the end of May, are found mainly during June and July basking in the sun on the upper surface of floating lily leaves upon which they feed. They are best located with the aid of binoculars since they often choose sites well out on the water, and are difficult, at that distance, to distinguish from flies, bees and other insects that frequent the same sites. They are very alert and not easily approached. The beetle has exceptionally long curved hind legs and, like D. versicolorea, the elytra have a dark shiny surface with a slight purple or copper reflection. Close examination shows the surface of the elytra to be covered with pin- points of light reflected from the strial punctures, giving a 'starry night' effect, a feature also shared with D. versicolorea. D. crassipes may be distinguished from D. dentata and D. versicolorea, which also have disproportionately large hind legs, in not having the pronotum strongly rugose but microsculptured throughout with fine grooves and reticulations with only sparse shallow punctures on the disc. In addition, the hind femora have one obtuse tooth or, if two, these are separated by a
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Keywords: ., bookcentury1900, booksubjectentomology, booksubjectnaturalhistor
