52 PROCEEDINGS OF THE NATIONAL MUSEUM vol.82 



with paler basal joint, third, fourth, and fifth joints subequal, the 

 fourth slightly the longest. Prothorax approximately twice as wide 

 as long, somewhat convex, narrowed anteriorly with arcuate sides; 

 alutaceous, densely and moderately coarsely punctate, except some- 

 times a smooth median linear area; entirely pale. Scutellum dark. 

 Elytra broadly oblong oval, convex, humeri not marked and with 

 little trace of intrahumeral sulcus, moderately coarsely and densely 

 punctate and somewhat shining; pale with wide sutural, median, and 

 marginal vittae, the sutural and marginal vittae uniting at apex. 

 Body beneath sparsely and indistinctly pubescent, shining black ex- 

 cept prosternum and last ventral segment; legs black with a light 

 streak on outside of tibiae. Length, 4 to 5 mm ; width, 2.3 to 3.3 mm. 



Type locality. — California, near shore. Collected by Eschscholtz 

 and Blaschke. 



Distribution. — California (Birds Landing, Carmel, Colton, Fi- 

 gueroa Park, Los Angeles, San Mateo, San Francisco, Warners, 

 Yosemite National Park) ; Nevada (Ormsby County). 



Food plant. — Sugar beet {Beta vulgaris var.). 



Remarks. — D. inaritirna, like glahrata^ has a dark marginal vitta 

 on the elytra, but differs from glahrata in being coarsely and densely 

 punctate and in having dark legs and a darker ventral surface. Like 

 glabrata^ it is not closely related to any other North American spe- 

 cies, and appears more closely allied to the species with dark elytra 

 than to the vittate species. 



Dr. E. C. Van Dyke ^^ has noted that this insect sometimes hiber- 

 nates in colonies. He collected it in the clefts of rocks along the 

 crest of San Bruno Hills, on the southern boundary of San Fran- 

 cisco County. I have collected it in July at an altitude of 8,000 feet 

 at Glacier Point, Yosemite National Park. 



24. DISONYCHA COLLATA (Fabricins) 

 Platb 7, Figure 41 



Crioceris collata Fabbicius, Systema Eleutheratorum, vol. 1, p. 463, 1801 



(Carolina; Bosc collection). 

 Altica collata Oliviek, Entomologie, vol. 6, p. 702, 1808. 

 Disonycha collata Dejean. Catalogue, p. 414, 1837. — Horn, Traus. Amer. Ent. 



Soc, vol. 16, p. 212, 1889 (in part). 

 fDisonycha coUaris Crotch, Proc. Acad. Nat. Sci. Philadelphia, vol. 25, p. 64, 



1873. 

 Disonycha melUcollis Horn, Trans. Amer. Ent. Soc, vol. 16, p. 211, 1889 (not 



Altica mcllicollis Sa.v). 



Description. — Elliptic oval, with shining metallic green or blue 

 elytra, dark upper half of head, and partially darkened undersur- 

 face; lower front of head, prothorax, femora, and margin of abdomen 



™Van Dyle, Ent. News, vol. 30, p. 244, 1919. 



