It is well known that many of the crickets and katydids are not as uniform in their mass population as external morphological characters such as the systematist deals with would make them appear. The sequences of the seasons have made possible certain physiological segregations and expressions both in plants and animals. The winter annual among plants is well known, for it is the survival of a plant over the winter in the vegetative condition, usually in the immature rosette stage. As soon as the spring opens these chilled and sluggish plants start into growth and mature their seed in advance of seed sown in the springtime. The Annual Larkspur is a notable example of one of these. Not all plants normally produce winter annuals, for it is evident a plant must possess a high degree of cold resistance.

This dark green aphid feeds upon the roots or underpart of the crown of match brush, Gutierrezia longifolia. Usually the colonies of this tiny aphid are within two inches of the surface of the ground, but individuals have been collected to a depth of four inches.

Length 4.5-7 mm.: width 28-4 mm. Broadly oval; moderately convex; feebly shining; blackish, the dorsum with a bluish or greenish tint; body with erect brownish hairs. Head about one-half as wide as prothorax; genae moderately arcuate.

Distinguished from allied species by the relatively narrow head and smaller eyes; width of head acrloss eyes about equal to basal width of pronotum; length of second antennal segment much greater than width of head.