. British insects : a familiar description of the form, structure, habits, and transformations of insects. ter. With the bees we come to theend of the first division of in-sects ; namely, those which havebiting mandibles. In the second division, containingthe insects with suckbig mouths, and without biting jaws,the whole structure of the mouth appears widely stinging proboscis of the gnat, the fleshy blunt trunkof the housefly, the long slender tongue of the butterflv,all these display variation of structure. The tongue in these insects is composed of some orother of the parts al
. British insects : a familiar description of the form, structure, habits, and transformations of insects. ter. With the bees we come to theend of the first division of in-sects ; namely, those which havebiting mandibles. In the second division, containingthe insects with suckbig mouths, and without biting jaws,the whole structure of the mouth appears widely stinging proboscis of the gnat, the fleshy blunt trunkof the housefly, the long slender tongue of the butterflv,all these display variation of structure. The tongue in these insects is composed of some orother of the parts already mentioned, recognisablethough greatly altered from the biting type, and occasio-nally so soldered together, or transformed in figure, thatnothing but a careful analysis can reduce them to a uni-form plan. This will not be attempted here, but it wouldbe well for the reader to aim at tracing the connexionexisting in the organs of the various insects he dissectsfrom time to time. In the butterflies and moths a long tubular proboscisis found, which coils up under the mouth when at rest D 84 2Profile head of Moth. (fig. 8—1, 2). This is a development of the maxillse,Fig. 8. other parts of the mouth, ex- cepting the lower lip, beingalmost undeveloped. Theunder lip is furnished with apair of large palpi, thicklyclothed with hair. Next in order come theaphis, cicada, &c., and thewater-boatmen, bugs, & proboscis of these is afine but sometimes very hard tube, containing four hair-like lancets. These lancets wound the surface of plantor animal, the juices of which are then sucked up throughthe tube. In this case the tube is formed by the labium,the four lancets representing the maxillae and the flea the mouth is a sucking apparatus with apair of serrated lancets; but the parts, though closingupon each other when at rest, difier from those of thetwo preceding orders in being free and independent ofeach other. The two-winged flies—such as the housefly,
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Keywords: ., bookauthorme, bookcentury1800, bookdecade1870, booksubjectinsects
