. The American entomologist. Entomology. On'CIDERes crNGL'LATUS—rt, larva; h, pupa (after Riley). curiosity, which has been among those who have suffered by its ravages if you will kindly inform me what the name of this insect is, among entomologists, and whether it has any common name.—Wm. Rod. Maxwell. The insect sent is a rather large female of the Twig-Girdler (OnciJirc-s cingtilalus Saj'). which we herewith figure in its different stages. An account of it was given on page 76 of the first volume of this magazine. It is known to girdle a great number of different trees, among whic
. The American entomologist. Entomology. On'CIDERes crNGL'LATUS—rt, larva; h, pupa (after Riley). curiosity, which has been among those who have suffered by its ravages if you will kindly inform me what the name of this insect is, among entomologists, and whether it has any common name.—Wm. Rod. Maxwell. The insect sent is a rather large female of the Twig-Girdler (OnciJirc-s cingtilalus Saj'). which we herewith figure in its different stages. An account of it was given on page 76 of the first volume of this magazine. It is known to girdle a great number of different trees, among which may be mentioned Hickory, Elm, Persimmon, American linden, Pear, Apple, Peach and Plum. Both sexes of the beetle feed upon the bark of the hickory, but only the females, so far as we are aware, girdle the twigs. After partly girdling a particular twig she lays a eggs in the distal portion that has been killed, each egg [Fig 1561 usually inserted just beneath a bud.' The twig usually, though not always, breaks off 0 by the force of the wind during winter, and the larvse flourish upon the dead wood as it lies upon the ground, burrowing just beneath the bark, and when very numerous leaving little else than the outer bark. The beetles do this work in the fall of the year. The young larva hatches and works a short dis- tance into the twig before On'cideki-scingu- winter sets in and continues ir„r;%':poT„\'»tr; ^'°^king through spring and egg IS inserted; <-, summer, transforming to pupa form of girdle; *?, egg, extracted (after only towards autumn. Some '*''''''• writers have staled that two years are required for its development. While this may be true farther north it is not true of the latitude of St. Louis where we have reared the in- sect repeatedly from the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly
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