_Harris's Checker-spot_ (_Cinclidia harrisii_ or _Melitaea harrisii_). Expanse 1 3/4 inches. This species bears a close general resemblance to the Silver Crescent. It may be distinguished by the fact that the middle joint of each palpus is of uniform size from end to end instead of tapering toward its outer end. The tibial joint of the first pair of legs of the male butterfly is very thick. The upper wing surface is so marked with black that the tawny red coloring shows only in the middle. _Silver Crescent_ (_Charidryas nycteis_, _Melitaea nycteis_ or _Phyciodes nycteis_). Expanse 1 3/4 inches. This species may be known from Harris's Checker-spot by the fact that the middle joint of each palpus tapers from the middle to the tip and that the tibia of each front leg in the male is slender rather than stout. On the lower surface of the wings there is a narrow yellowish marginal line. _Pearl Crescent_ (_Phyciodes tharos_ or _Melitaea tharos_). Expanse 1 1/2 inches. General color much lighter than either of the preceding. Terminal joint of each palpus less than a third as long as the middle joint. THE TRIBE OF THE ANGLE-WINGS The special characteristic that distinguishes the members of this important group from the other Nymphs is the fact that on that portion of the club of each antenna which has not hairs there are three longitudinal ridges. The tribe includes a large number of our most familiar butterflies. Nearly all of them are rather large, with bright attractive colors. They fly freely along roadsides and in orchards, fields, and meadows so they are commonly seen by every one. =The Violet-tip= _Polygonia interrogationis_