Penny Cyclopaedia of the Society for the Diffusion of Useful Knowledge Volume 7

Penny Cyclopaedia of the Society for the Diffusion of Useful Knowledge Volume 7

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1837 edition. Excerpt: ...principal genera included in this family are Cylindrus, Tillus. Priocera. Axina, Eurypus, Thanasimus, Opilus, Clerus, Necrobia. and Enopliwn. The genus Clerus is thus characterized: maxillary palpi with the terminal joint th.cker than the rest, compressed, broadest at the apex, and truncated; labial palpi with the terminal joint securiform; antenna; with the basal joint rather long, the seven following short, the throe terminal joints forming a comptessed knob of the form of a reversed triangle; tarsi exhibiting only four distinct joints. Two species of this beautiful genus (.Clerus apiarius and C. alvearius) are natives of this country, but they are here of rare occurrence, though in Germany, France, and Italy, they are common, and are found on the flowers of umbelliferous plants. Clerus apiarius varies from half to two-thirds of an inch in length, and is very thickly covered with hairs; it is blue, the elytra are red, and have three blue fascia?, one of which is at the apex. The larva of this species feeds upon those of the common hive-bee, and is sometimes very destructive to hives. Clerus alvearius very much resembles the species just described, differing chiefly in having a blue spot in the region of the scutellum in addition to the three blue fascioa on the elytra; its larva? feed upon those of the mason bees. Dejean enumerates thirty-seven species of the genus Clerus in his ' Catalogue des Colcopteres, ' and it appears that the genus is not confined to any particular part of the globe, as is frequently the case. CLERK, JOHN (of Eldin, N.B.), was the inventor of one of the most important parts of the modern British system of naval tactics. In 1779 he communicated to some friends his notions concerning what is technically more

Product details

  • Paperback | 704 pages
  • 189 x 246 x 36mm | 1,234g
  • United States
  • English
  • black & white illustrations
  • 1236748743
  • 9781236748744