Note R — Front matter (continued 2)

In both of the species here described the adult female has the tibiæ shorter than the tarsi. The author has hesitated to found a generic character on it until the discovery of other species; the character is quite exceptional in the family, occurring (besides) only in some species of Acanthococcidæ. In all others a tibia shorter than the tarsus would indicate an immature insect.