File:Guide to the study of insects, and a treatise on those injurious and beneficial to crops- for the use of colleges, farm-schools, and agriculturists (1872) (14760836286).jpg

Identifier: guidetostudyofin1872pack (find matches)
Title: Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists
Year: 1872 (1870s)
Authors: Packard, A. S. (Alpheus Spring), 1839-1905
Subjects: Insects Beneficial insects Insect pests
Publisher: Salem, Naturalist's agency (etc., etc.)
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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nvex in its outer half, with nu-merous and prominent cross-veins but no reticulations ; whenat rest, overlapping quite completely, even close to the base. LI BELLI! LI I >.!•;. .r>97 much as in the 1 c. r I a ri w, and probably with the sides pro-tected near the base by the deflected marginal and scapular(subcostal) areas. Scudder shows that while the venation ismuch the same as in Hemerobins, as stated by Professor Dana,it also resembles that of the /S tali dee and Ephemeridce andLihc.llalidw. Gerstaecker thinks that Hemeristia at leaststands nearer to the Epliem crt-thc than to any other family.(IJronns Klassen mid Ordnungen des Thier-Keichs, vol. v.) LIBELLULID.E Latrcille. Dragon-flies, Devils-darning-nee-dles, or Mosquito Hawks, are readily known by the enormoushead and thorax, with the remarkably long, slender, cylindricalabdomen. The head is large and globular, with immense eyesoften encircling the head. The large square thorax is remark- 13 C P/,m/\ ^ytf^;:::> 7 £-
Text Appearing After Image:
able for the small size of the tergal parts, while the piecescomposing the flanks are greatly enlarged, rising up especiallyin front, taking the place of the prothorax, which is usuallyvery large in the Neuroptera generally, but is in this familygreatly aborted, as these insects scarcely ever walk. As inthe Ephemeridce the antennae are short and setiform, a.ndthe mouth is not furnished with palpi. The wings* are large. *FiG. 579. Venation ol ;i lore wing of Gomphus. Veins. —a, a, costal vein: I,subcostal vein; c,c, median vein; d, submedian vein; e, postcostal vein. Sectors —(branches springing from area?, veins, cross-veins, or other sectors), fff, princi-pal sector; .</. nodal sector; h. subuodal sector; k, median sector; mm, short sec-tor; n, upper sector of the triangle (normally a prolongation of f/); o, lowersector of the triangle (normally a prolongation of e); o,o, its brandies. (Thefigure gives.an angle where » bifurcates from o, which should have been a flow-ing curv

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