. Bionomics, systematics, and phylogeny of Lytta, a genus of blister beetles (Coleoptera, Meloidae). Lytta. SYSTEMATICS AND PHYLOGENY 191 in proportion of length to width and in shape but without clear-cut geo- graphic pattern. The aedeagus is also notably variable. As a general rule, only a single hook is present, but occasional specimens from Alpine and Kern counties, California, have a weakly developed second hook. Morphological differences between first instar larvae of stygica from eastern Kern County (= smaragdida) and the San Francisco Bay region (= stolida) have been described by MacSw
. Bionomics, systematics, and phylogeny of Lytta, a genus of blister beetles (Coleoptera, Meloidae). Lytta. SYSTEMATICS AND PHYLOGENY 191 in proportion of length to width and in shape but without clear-cut geo- graphic pattern. The aedeagus is also notably variable. As a general rule, only a single hook is present, but occasional specimens from Alpine and Kern counties, California, have a weakly developed second hook. Morphological differences between first instar larvae of stygica from eastern Kern County (= smaragdida) and the San Francisco Bay region (= stolida) have been described by MacSwain (1956). For a summary of the principal differences between adults of stygica and the closely related species chloris, rathvoni, and comans, see Table V. The types of stygica, smaragdida, dolosa, stolida, purpurescens, and difficilis are in the Museum of Comparative Zoology. The type of neva- densis is in the collection of the California Academy of Sciences (Type no. 5866, examined); the type series is labeled as collected in June, not July as stated by Van Dyke (1947). Wellman's (1912) description of arborea was based on an unspecified number of specimens collected at Weitchpec, Humboldt County, Cali- fornia, and near Hamburg, Siskiyou County, California, May 20, 1911 and June 2, 1911, respectively, by F. W. Nunenmacher. The type locality was given as Humboldt County, and it was stated that the type was in the Wellman collection. There is, however, no specimen labeled as the type in the Wellman collection in the United States National Museum. On the contrary, one of several Siskiyou County specimens in the Nunen- Table VI. Variation in the Proportions ( Length/Width ) of the Male Fifth Antennal Segment in Lytta stygica* Washington, norlheostern Oregon, and Idaho(A) , Western Oregon ond northern coostol and extreme northern California (B) l_ Central coostol California (C) North-central California and the Sierra Nevada (D) Inyo Mountoins and Panammt Mountains, i California (E
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