. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. A REVISION OF THE GENUS PLEOCOMA By A. C. Davis U. 8. Dept. of Agriculture. Bureau of Entomology and Plant Quarantine Continued from Vol. XXXIII, No. 3, p. 130 Characters, Methods, and Terms The characters upon which the species of Plcocoma are sep- arated are fairly numerous. Among the most important are the number of joints in the antennal club, the hairiness of the prono- tum and the scutellum, and the sculpture of various parts of the body. A few species, such as P. staff and P. hoppingi,
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. A REVISION OF THE GENUS PLEOCOMA By A. C. Davis U. 8. Dept. of Agriculture. Bureau of Entomology and Plant Quarantine Continued from Vol. XXXIII, No. 3, p. 130 Characters, Methods, and Terms The characters upon which the species of Plcocoma are sep- arated are fairly numerous. Among the most important are the number of joints in the antennal club, the hairiness of the prono- tum and the scutellum, and the sculpture of various parts of the body. A few species, such as P. staff and P. hoppingi, have char- acters that set them apart from the others immediately, but the worker in the group must depend chiefly upon an aggregate of minor characters, rather than upon one or two diagnostic ones. With the exception of the number of joints in the antennal club and the hairiness of the pronotum and scutellum, there are few characters that are not subject to great variation. The parts of the head used in classification are illustrated in Figure 1, A and FIGURE l Pleocoma badia fall: A—One-half of dorsal view of head. B—Outline of profile of head: 1. apex of clypeus; 2, emargination of clypeus; 3, ocular canthus; ',. eye; 5, horn of vertex; 6, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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