On June 18, 1914, my wife and I found a hitherto undescribed gall on _Stanleya glauca_ Rydberg, a remarkable cruciferous plant growing about four miles north of Boulder, Colorado. Thinking to rear the adults, the galls were placed in a bottle with some earth and watched for a long time, but nothing appeared. Supposing the effort to have been unsuccessful, I set the bottle aside; but long after discovered that adults had eventually emerged, but had died and were covered with mold. I was able to rescue sufficient fragments to make the drawings given herewith, which, together with the larval characters, serve very well to indicate the genus, with enough of the specific characters for ready recognition. The species may be called _Perrisia Stanleyae_ n. sp. (Cecidomyiidæ) _Gall_: A swollen flower of _Stanleya glauca_, containing many pallid larvæ. The sepals are thickened and enlarged. _Larva_: With the skin strongly verrucose; breastbone of the same general type as that of _P. fructicola_ Kieffer; caudal end with strong spines. _Male_: The characteristic genitalia and antennal joint are figured. Hydroids of Laguna Beach PROF. A. M. BEAN PACIFIC UNIVERSITY, FOREST GROVE, OREGON The identification of the hydroids included in this list was undertaken while making a general collection of the marine forms of the Laguna Beach region. The specimens were taken mostly from the miscellaneous shore collections, and there is no claim to exhaustiveness. They were, however, examined as fresh material, and nearly always with the living polyp still present. There was abundant promise of opportunity for the study of ecological and developmental problems, of which I was unable at that time to take advantage. The region covered included a strip of shore line of about two miles in extent. Part of this is sandy beach which after a heavy tide would often be covered by the laminæ and holdfasts of _Macrocystis_ and other kelps, to which hydroids were generally attached. The remainder of the shore was rocky and of a remarkably varied conformation, including tide pools, deep channels, rock tables, mussel beds, and short stretches of sand and pebbly beach. Scarcely any attempt was made at dredging, and the shore itself was by no means completely searched. GYMNOBLASTEA Family PENNARIIDÆ _Tubularia_ sp.