Any evidence which would help us to forecast grasshopper outbreaks, or to anticipate and check them before they become acute, is worth considering and on this account the recently annunciated “phase” theory, and the still later “reservation” theory, should secure the careful consideration of American entomologists.

While making an intensive study of the bark beetles of Western North America, I noticed that two of the species in the genus Carphoborus were new. Since the last key to the species of this genus has been compiled (Swaine, 1918) Dr. Swaine has described five new species which with my two would more than double the number in the genus. I therefore feel that a new key should be made.

I am indebted to the Museum of the California Academy of Sciences for the use of its collection of this genus, and to Dr. E. C. Van Dyke of the University of California for his helpful criticisms.

The literature concerning the large Stag-beetle Pseudolucanus placidus (Say) contains many conflicting and misleading data. Since the species occurs in exceptional abundance in a very restricted sandy area surrounding the author's home, it became a fairly easy task to check up on these statements. Thc present paper contains the information gathered during the past several years.

Thrips have frequently been abundant in flowers and less abundant upon other parts of plants in most sections of Utah. Considerable thrips damage to onions occurs practically every year in most onion-growing areas of this state, while beans, beets, and other crop plants are less generally affected. It appears that damage, due to thrips, is more general in Utah than has usually been supposed. A desire to become better acquainted with the forms occurring upon various plant species in this region has led to this study.

Robust, reddish-brown, sparsely clothed with fulvous and white pubescence. Head coarsely, rather densely punctured, sparsely clothed with recumbent white hairs; antennae slightly longer than the body ( ♀ ), segments bicolored, basal portion of each segment clothed with white pubescence, apex glabrous or finely clothed with brownish hairs; scape moderately stout, second segment about one-fifth as long as scape, third segment slightly less than half as long as scape, remaining segments diminishing gradually in length toward apex.

For several years I have been interested in the prey of the Robber Fly, Mallophora orcina (Weid). I have taken two hundred and eighteen specimens of this robber fly with its prey. The prey belonged to twenty-three species of insects.

It will be noticed that not a single specimen was taken with the large yellow jacket (Vespa carolina), although this species is as common here as is the smaller yellow jacket (Vespa germanica). Ten specimens were taken with Liacos nobilitata, while not a single specimen was taken with Liacos bicincta, although it is as common here as is nobilitata.