Article beginning on page 300.
Psyche 9:300-312, 1900.

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raised dots-for they were not more than
that -began to grow at once, the red color remaining in the tip of each, and the lower part having almost no color at first. The growth was sorapid that in five minutes after leaving the shells the long thoracic tnbercles or "horns " had their normal size and shape, and the lateral spines had appeared. The setae grew dark first, then the spines, then a pale red color suffused the "horn " as if it ran down from the tip, itlnch grew paler.
The abdominal tubercles gained the normal color first, in about fifteen minutes, and in an hour all the tubercles, spines, feet, tips of props, and mouthparts had become black.
The development of the long tubercles was very rapid and very interesting, and %as watched in many instances, each one giving exactly the same details in the same order, though the caterpillars differed much in the time they took to eat their way out ot the shell. Some needing an hour, others over two hours.
Observation of another set of eggs showed that. the color of the thoracic setae vaued, some larvae having the setae all black before hatching, others having only those of the first segment black, the others being white.
LITERATURE.- Comstock and Kellogg's
Elements of Insect Anatomy, advertised on another page, is an admirable guide to the practical study of the anatomy of insects. The suhjecti. treated in detail arc the external anat- om) of Mulanoplus and Pterostichus, the
internal anatomy ot Corydalis and the gen- eral anatom' of the larva of I-Iolorusia. Chap- teis explaiiutory of technical terms, of the mouthparts and venation and of methods of insect histology add everything that is
requisite for the beginner. We cordially commend the work.
CORRECTION :-Page 273, col. 2, line I,
for Odynes'its read Smneues.
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