Directions for collecting and preserving insects . r be madetogether, forming a sort of shelf. A number of these shelves may beconstructed and the whole combined in a case with a screen cover toexclude insects. The individual shelves maybe arranged with groovesto slide on tongues in the side of the case. A screen-covered case forspreadiug-boards is always desirable, as the insects are otherwise veryliable to be eaten by roaches or other insects. A spreading-case ofthe form described is shown at Fig. 107. A new Apparatus for Spreading Microlepidoptera.—For the spreadingof Microlepidoptera my as
Directions for collecting and preserving insects . r be madetogether, forming a sort of shelf. A number of these shelves may beconstructed and the whole combined in a case with a screen cover toexclude insects. The individual shelves maybe arranged with groovesto slide on tongues in the side of the case. A screen-covered case forspreadiug-boards is always desirable, as the insects are otherwise veryliable to be eaten by roaches or other insects. A spreading-case ofthe form described is shown at Fig. 107. A new Apparatus for Spreading Microlepidoptera.—For the spreadingof Microlepidoptera my assistant, Mr. Theo. Pergande, has devised anapparatus, represented in the accompanying illustration, which he findsvery convenient. It consists of a small spreadiug-block represented at. [77] COLLECTING AND PRESERVING INSECTS RILEY B and the support with attachment shown at A. The former is madein a long strip of the shape•shown in the illustration,having a square groove, c,cut in the top. Over this isglued a thin strip of wood,fc, say £ inch thick, and anarrow slit is sawed in thecenter of this above, cutting-through into the groove is then sawed up intopieces of uniform length,say 1£ to 2 inches, and the block is completed by the Flo (original). insertion of a rectangular strip of pith or cork into the groove. The Micro ispinned on a shortblack pin, and the pin is thrust down into the narrow opening madeby the saw and is held firmly by the pith or cork. This block is thenslid into the groove in the setting-board A, which narrows slightly frome, and pushed along until firmly secured (d}. The operator can thenrest his hands and arms on either side of the support, and, if necessary,bring a large hand lens over the object by means of a sup
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Keywords: ., bookauthorrileycha, bookcentury1800, bookdecade1890, bookyear1892
