Directions for collecting and preserving insects . ETIN 39, UNITED STATES NATIONAL MUSEUM. [f)G] require the most delicate treatment, and the greatest care must beexercised both iu collecting and handling. A light sweep net is the best implement for collecting and thecontents of the net should frequentlybe emptied into bottles provided withblotting paper to absorb the excess ofmoisture. Very small Diptera shouldnot be killed whenthey can not be imme-diately pinned, andhairy flies shouldnever be taken fromthe net with thehand,but should be handledwith fine forceps. A pair of special collecting
Directions for collecting and preserving insects . ETIN 39, UNITED STATES NATIONAL MUSEUM. [f)G] require the most delicate treatment, and the greatest care must beexercised both iu collecting and handling. A light sweep net is the best implement for collecting and thecontents of the net should frequentlybe emptied into bottles provided withblotting paper to absorb the excess ofmoisture. Very small Diptera shouldnot be killed whenthey can not be imme-diately pinned, andhairy flies shouldnever be taken fromthe net with thehand,but should be handledwith fine forceps. A pair of special collecting shears has been used byLord Walsingham very successfully. It is repre-sented in the accompanying figure, and consists ofa pair of screen-covered disks, between which the flyis caught. The insect is at once pinned through thescreen and may be removed and transferred to abox containing a sponge soaked in chloroform. Tin-use of this implement is especially advisable in the case of the Bee-fliesand other hairy forms which are liable to be rubbed when. FIG. 78.—Ox Bot-fly (Hypoderma bovis)enlarged. (After Brauer.)
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Keywords: ., bookauthorrileycha, bookcentury1800, bookdecade1890, bookyear1892
