HOW A CATERPILLAR STRIKES TERROR TO A FOE The fearsome mien of this larva of a common Swallow-tail Butterfly (greatly magnified) is only camouflage. The real head of the insect is the small semicircular segment at the bottom of the picture. The huge "eyes" are only make-believe (see text, page 91). The antennæ of moths and butterflies are believed to be the aërials through which they receive the calls of their distant mates. The photograph is greatly magnified. THE CATERPILLAR OF THE HOG SPHINX MOTH (SEE COLOR PLATE XI, FIGURE 8) The One of the fantastic tricks in Nature encountered in the insect world is polyembryony, wherein a single egg of a parasite may produce as many as 300 larvæ of the same sex. THE SADDLE-BACK CATERPILLAR OF THE SOUTH IS ESPECIALLY FOND OF GREEN READY TO WREAK HAVOC: WEBBING CLOTHES-MOTHS AND THEIR LARVÆ The moth itself is perfectly harmless, but the larvæ that hatch from its eggs spin themselves little transparent tubes or tunnels of silk wherever they go. They feed upon the wool fabric and also use fragments of it in making their pupal cases. These larvæ will riddle this coat. AROUND, AND AROUND, AND AROUND MARCH THE PINE PROCESSIONARY CATERPILLARS So stupid that they cannot find their way home without their guiding life line, and yet so alert to barometric changes that they make excellent prognosticators of inclement weather, these European cousins of the species that build their tents in our apple trees (see illustration, page 83) are one of the strangest contradictions in the insect world (see text, page 93). AN ATLAS MOTH FROM THE LONDON ZOOLOGICAL GARDENS With a wing-spread of ten inches the Atlas Moth is one of the largest of the Lepidopters. The |