The # of the United States

The # of the United States

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1888 edition. Excerpt: ...body to a great extent, forming an envelope of considerable thickness. They sometimes tend to become digitate, so that this species, together with E. Culicis, forms a connecting link between the simple and compound types. The species occurs not uncommonly in North Carolina on the under side of leaves in Rhododendron thickets; and I have found it occasionally in Maine near brooks or marshy places in woods, always on leaves. The specimen on Hyphantria textor (larva) was found at Burbank, E. Tenn., in one of the nests peculiar to these caterpillars; but, although there were many in the nest, I found no additional specimens attacked by the fungus. The omnivorous character of the species is noticeable, and experiments with infections of different hosts are much to be desired, especially with aphides, since it is only by this means that the true relations between this and the succeeding form can be determined. Empusa Planchoniana (Cornu)?. PI. 15, figs. 76-78. Entomophthora Planchoniana, Cornu I. c. A, pp. 189,190; I. c. B, foot-note, p. 4. Sorokin I. c. C, p. 214. Conidia nearly spherical or broadly ovoid, with a papillate base which is sometimes furnished with a short sharp point. Average measurements 28-33, X 30-40/Jt. Conidiophores simple, partially coalescing over the host. Secondary conidia like the primary. Resting spores, azygospores, produced laterally or terminally, more commonly interstitially, from hyphae; spherical, or very irregular in the interstitial forms; 35-50/1 in diameter. Host attached to substratum by the insertion of its proboscis. Hosts. Hemiptera: several genera of aphides. Habitat. Kittery, Maine; vicinity of Boston, Mass.; Europe. It is with much hesitation that I have placed under the above name a species occurring in this...show more

Product details

  • Paperback | 40 pages
  • 189 x 246 x 2mm | 91g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123653431X
  • 9781236534316