DIAPERINI NORTH OF MEXICO — TRIPLEHORN 407 



front coxae, becoming gradually broader to just behind coxae, then 

 rapidly tapering to a point apically, horizontal, and prominent. 

 Metasternum coarsely and sparsely punctured anteriorly, a large 

 crescent-shaped area along caudal margin devoid of punctures. First 

 four abdominal segments uniformly coarsely and densely pimctured, 

 forming longitudinal wrinkles laterally, apical two segments finely 

 and sparsely punctate. Male genitalia with ventral portion of lat- 

 eral lobes continued backward as a single short spine (pi. 4, fig. 27). 

 No apparent external sexual dimorphism. Measurements: length 

 4.0-6.1 mm.; width 2.3-3.4 mm. 



Remarks. — This species is remarkably constant in appearance and 

 may readily be distinguished from its congeners by the broadly ovate 

 form, the deeply impressed head, the very narrow and slightly un- 

 dulated lateral elytral margins and the abbreviated outermost elytral 

 striae. 



Type. — MCZ 4692; type locality, Oregon. The specimen is in very 

 poor condition but quite recognizable. 



Specimens examined. — From the following localities, 682 : 



United States: California (Ahwahnee, Auburn, Bartlett Springs, Bass Lake, 

 Beaumont, Biledo Meadow, Blocksburg, Bucks Lake, Carmel, Cazadero, Chester, 

 Chiquito Creek, Cole, Colorado Desert, Colton, Dunsmuir, Eagle Park Meadows, 

 Facht, Gold Lake, Huckleberry Meadow, Huntington Lake, Idyllwild, Indio, 

 Kaweah, Kyburz, Laguna Beach, Lagunitas, Lake Arrowhead, Lake Tahoe, Little 

 Yosemite, Los Gatos, Lyons Dam, Manzanita Lake, Mather, McCloud, Meadow 

 Valley, Millwood, Mokelumne River, Mountain Springs, North Fork, Oakland, 

 Ojai, Old Station, Pacific Slope, Palo Alto, Palomar, Pasadena, Phillips Station, 

 Riverside, Round Meadow Giant Forest, San Berardino, San Diego, San Jacinto 

 Mts., San Mateo, Santa Cruz Mts., Sequoia National Park, Sierra National Forest, 

 Soda Springs, Stockton, Strawberry Valley, Sugar Pine, Summit Lake, Tallac, Tan- 

 bark Flat, Tenaya Canyon, Truckee, Viola, Walnut Creek, White Water, Wolver- 

 ton, Wrights Lake, Yosemite National Park, Alpine Co., El Dorado Co., Los 

 Angeles Co., Mariposa Co., Placer Co., Santa Clara Co., Siskiyou Co., Sonoma 

 Co., Trinity Co., Tulare Co.). Idaho (Pierce, Priest River, Wallace). Oregon 

 (Ashland, Astoria, Corvallis, Forest Grove, Hood River, Medford, Portland, 

 Suttle Lake, Upper Klamath Lake). Washington (Baring, Easton, North Bend, 

 Tenino, Wenatchee) . 



Canada: British Columbia (Creston, Lillooet District, Mission City, Pender 

 Harbor, Steelhead, Trinity Valley, Vancouver). 



Platydema laevipes Haldeman 



Plate 4 (Fig. 29) 



Platydema laevipes Haldeman, 18-18, p. 101. — Horn, 1870, p. 383. — Blatchley, 1910, 



p. 12G4. 

 Platydema crenatum LeConte, 1878, p. 422 [new synonymy]. 



Description. — Body elongate oval, strongly convex, dark brown 

 to blackish, feebly shining. Head convex between eyes, coarsely and 

 densely punctured, usually a few large, widely separated punctures 



