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noise on being handled or disturbed. This noise is caused by rubbing the joints of the 

 thorax and abdomen together. 



The beetles may generally be seen reposing quietly on the trunks of the trees during 

 the day time, as they are more active at night, which period they select for their excur- 

 sions in search of their mates. According to Mr. Harris, the bettle lays its eggs on the 

 trunk of the maple in the months of July and August. 



The larvae hatched from these eggs are long, whitish, fleshy grubs, with deeply marked 

 transverse incisions on the body. Their legs, which are six in number, are only rudi- 

 mentary, and are of no service in locomotion ; it is by means of the alternate contraction 

 and extension of the rings or segments of the body that these little creatures force their 

 way through the wooden tunnels in which they live, and in order to further assist their 

 progress each segment is furnished with fleshy tubercles capable of protrusion, and which, 

 being pressed against the sides of their retreats, enable them to thrust forward by degrees 

 the other segments. As the grub has to feed upon very hard material it is provided with 

 strong horny jaws, and the head, which is slightly bent downwards, is also covered with 

 a strong horny skin. The grubs penetrate the bark, under which they lie dormant during 

 the winter, and in the succeeding spring and summer they pierce further in, running long 

 winding galleries up and down the trunk. The larvoe probably remain more than one 

 year in this condition, and then change into pupae, in which state they are at first whitish 

 and very soft, but gradually harden and darken until the time arrives when the beetle is 

 perfectly matured, and forcing a passage through the outer bark, near which it has 

 instinctively eaten its way whilst yet a grub, emerges into the open air. 



This is a very injurious insect, which attacks chiefly the sugar maple. When pre- 

 sent they can be readily detected by the sawdust and exuvije that they cast out of their 

 burrows, and in the spring, whilst still near the surface, it is quite possible to kill them 

 by means of a stout piece of wire, or the judicious use of a good sharp knife. 



The Maple Aegerian — Aegeria acerni. 



While the borer last described is partial to the sugar maple this species is usually 

 found injuring the soft or red maple. The several stages of the insect are shown in 

 Fig. 7 : a represents the larva, b the cocoons under the bark, c the moth, and d the chrysalis 

 forced through the bark. 



The moth appears late in May and during June. 

 When the wings are expanded it measures about three- 

 quarters of an inch across ; its wings are transparent, 

 decorated with bluish-black markings. The head and 

 palpi are of a deep reddish-orange, antennae bluish-black, 

 thorax ochreous-yellow, abdomen bluish-black varied with 

 ochreous-yellow and terminated by a tuft of brilliant 

 reddish-orange hairs. 



The under side of the body is ochreous-yellow with 

 bluish- black markings. 



The female deposits her eggs on the bark of the soft 

 and sugar maple trees, chiefly on the former, and when 

 hatched the young larvse burrow through the bark and 

 feed upon the inner portion and sap wood, never pene- 

 trating into the solid hard wood. The excavations made 

 by the larva are filled with its brown castings. When 

 full grown it is more than half an inch long, cylindrical 

 to the eleventh segment, then tapering to the end, with 

 the skin wrinkled and folded. The head is small, of a 

 yellow color, cervical shield paler ; stigmata brown ; legs 

 and tips of prolegs reddish. When the larva is full 

 grown it eats its way nearly through the bark, leaving 



but a very thin layer unbroken ; it then retires within its burrow, and having enclosed 

 itself within a loose, silky cocoon, changes to a brown chrysalis. A short time before 



