Directions for collecting and preserving insects . r time many specimens can be swept from thedead grass. So long as the dew is on the plants orin rainy weather no beating should be attempted,as the more delicate species are more or less spoiledby the moisture. After one or two minutes sweep-ing the contents should be examined. Those in-sects which are quick to take wing or which aregood runners should first receive attention; theless active can then be examined more at leisure. The desiderata are then disposed of, the rest thrown away, and the beating renewed. The beating net is an important
Directions for collecting and preserving insects . r time many specimens can be swept from thedead grass. So long as the dew is on the plants orin rainy weather no beating should be attempted,as the more delicate species are more or less spoiledby the moisture. After one or two minutes sweep-ing the contents should be examined. Those in-sects which are quick to take wing or which aregood runners should first receive attention; theless active can then be examined more at leisure. The desiderata are then disposed of, the rest thrown away, and the beating renewed. The beating net is an important instrument for collecting all insects excepting mature Lepidoptera, which are apt to get rubbed. Many larva?, especially of Lepidoptera, are caught by beating and are mostly in good condition, but it is usually difficult to ascertain the food Water Net.—The numerous insects or insect larvse which live in the water can not be conveniently collected without the use of a net, except where they live in small shallow streams or creeks with. FIG. 49.—Folding ringfor beatingnet (original). BULLETIN 39, UNITED STATES NATIONAL MUSEUM. [32] gravelly or stony bottoms. A suitable water net can readily bemade by using the frame of the beating net and attaching to it a rathershort bag of some coarse material, e. </., < grass cloth, coarse inillinet. The mode of operation with this net is very simpie : if some insect is seen swimming in the water,the net is carefully brought beneath the specimen,which is thus lifted out of the water. Most waterinsects are, however, not seen swimming about * bllt hide amid the various
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Keywords: ., bookauthorrileycha, bookcentury1800, bookdecade1890, bookyear1892
