During the spring of 1933, an adult convergent ladybird beetle, Hippodamia convergens Guerin, was placed in a 3-dram homeopathic vial with a number of nymphs of the potato psyllid, Paratrioza cockerelli (Sulc). The ladybird immediately grabbed a psyllid nymph and began to eat it. Ten fifth-instar psyllid nymphs were eaten by this predaceous beetle during the one and one-half hours that it was caged with the nymphs. It was noted that moving nymphs were taken more quickly than those at rest, but the beetle showed no reluctance at taking the scale-like nymphs which were quietly feeding.

Pseudococcus comstocki Kuwana is classed among the injurious mealy-bugs. It attacks a wide range of host plants. So far it has become abundant in the United States only in certain states east of the Mississippi River. In Connecticut it has received the name catalpa mealybug, because of its injuriousness to that plant. It is recorded as attacking many food-producing plants, but so far it has not been rated as a serious pest of any commercial crop plants. P. comstocki has been recorded from California by G. F. Ferris, where it was taken on Monterey pines growing on the campus of Stanford University. Ferris also records this mealybug from a number of host plants, including citrus, collected in Japan by Dr. Kuwana. A lookout has been kept for the appearance of P. comstocki in southern California, as it is considered to be a potential pest of citrus.

The genus Hypophloeus contains a number of undescribed species but until the relation of certain forms as sexes has been established or disproved it is probably as well to refrain from describing species closely allied to parallelus.

The three following seem, however, to be so clearly distinct that they should be made known.

The species here described were collected by Walter R. Sweadner, Department of Zoology, University of Pittsburgh, during 1932. The writer is also indebted to Doctor E. H. Graham, Carnegie Museum, Pittsburgh, Pennsylvania, for the identification of the host plant material.

Traces to section 27 (females) in Cushman's revision of the genus (Proc. U. S. N. M. Vol. 53, p. 513, 1917). Differs from mordellistenae Cush. in having the wings brownish and the face sub-equal in width to the eye length. Differs from incompletus (Prov.) in the brownish wings, the absence of pale orbital lines, broader stigma, broader radial cell and shorter metacarpus. Resembles fuscipennis Cress., but smaller with narrower face, eyes parallel within and abdomen wholly blackish. The male traces to section 13 (males) differing from the male of mordellistenae in the brownish wings, the absence of orbital rings and uniformly dark abdomen. From incompletus it differs in the brownish wings, broader ocellocular space which is slightly greater than the diameter of the lateral ocellus, and the lack of the orbital rings.

While, as Mr. Fall points out, the species of this group are rather closely allied, there seems to be a number of forms not yet described. Mr. W. J. Brown has recently described two species from British Columbia and the three treated in this paper seem clearly distinct.

The distinctions among the species are rather difficult to define, though, with the exception of certain forns of vilis and planiusculus, the differences may be seen clearly when secimens are at hand.