DIAPERINI NORTH OF MEXICO TRIPLEHORN 403 



fused with P. subcostatum, to which it bears only the most super- 

 ficial resemblance. 



Specimens examined. — From the following localities, 576: 



United States: Arizona (Bright Angel Camp, Catalina Mts., Chiricahua Mts., 

 Flagstaff, Greer, Huachuca Mts., Morrison, Mount Graham, Oak Creek Canyon 

 Palmerlee, Polino, San Francisco Mts., Santa Catahna Mts., Santa Rita Mts., 

 White Mts., WiUiams). California (San Bernardino Mts., San Diego). Colorado 

 (Cowdrey, Durango, Manitou Springs, Ouray, Waldo Canyon, Boulder Co.). 

 Connecticut (Cornwall). Idaho (Coeur d' Alone, Moscow Mt., Priest River). 

 Illinois. Iowa (Ames, Guttenberg, Mount Vernon). Kansas (Douglas Co.). 

 Maine (Bethel, Monmouth, Weld). Micliigan (Copper Harbor, Detroit, East 

 Lansing, Marquette, Newberry, Saginaw, Cheboygan Co., Chippewa Co., Ottawa 

 Co.). Minnesota (Cedar Creek Bog, Lake Itasca, Mississippi Bluff, Plummer, 

 Olmsted Co.). Missouri (Saint Louis). Montana (Bear Paw Mt., Cimbia Falls, 

 Potomac). Nebraska (Pine Ridge, Custer Co.). Nevada (Dixie National For- 

 est). New Hampshire (Claremont). New Jersey (Englewood, Bergen Co.). 

 New Mexico (Albuquerque, Cloudcroft, Jemez Mts., Las Vegas, Manzano, Santa 

 Fe, Tajique). New York (Allegany State Park, Buffalo, Danby, Elbridge, Ham- 

 burg, Ithaca, Lancaster, New York City, Olcott, Peru, West Point, Greene Co.). 

 North CaroHna (Black Mts.). Ohio (North Olmsted, Wooster, Franklin Co.). 

 Pennsylvania (Hummelstown, Jeannette, Pittsburgh, State College, Allegheny 

 Co., Tioga Co.). South Dakota (Hill City, Spearfish). Texas (Davis Mts., El 

 Paso). Utah (Bryce Canyon, Farmington, Parowan Canyon, Provo, Utah Co.). 

 Washington (Palouse). Wisconsin (Bayfield, West Bend). Wyoming. 



Canada: Alberta (Edmonton). British Columbia (Foulder, Merritt, Trinity 

 Valley). Manitoba (Aweme). Ontario (Bells Corners, Bruce, Grimsby, Guelph, 

 Manitoulin Island, Muskoka, Stratliroy, Toronto, Turkey Point, Hastings Co., 

 Prince Edward Co.). Quebec (Aylmer, Fort Coulonge, Duparquet, Laniel, 

 Montreal) . 



Platydema inexicanum Champion 



Plates 4 (Fig. 26) , 7 (Fig. 69) 



Platydema mexicamim Champion, 1886, p. 187, tab. 8, fig. 12. 



Description. — Body obovate, slightly depressed medially, light 

 reddish brown to almost black, feebly shining. Head shallowly im- 

 pressed between eyes, moderately coarsely and densely punctured, 

 antennae and mouthparts reddish brown, terminal segment of maxillary 

 palpus elongate, narrowly triangular; eyes large, flattened dorsally, 

 separated ventrally by a distance subequal to longer axis of one 

 eye. Pronotum transverse, sides evenly arcuate, basal angles obtuse 

 apical angles broadly rounded, lateral marginal bead thickened and 

 reflected, punctures fine, shallowly impressed, rather sparsely and ir- 

 regularly distributed, becoming somewhat larger baso-laterally in some 

 specimens. Elytral striae feebly impressed, punctures fine, shallow; 

 intervals almost flat, very minutely and sparsely punctured, lateral 

 margins of elytra rather broad, flaring, marginal bead fine. Proster- 

 nal process narrow, horizontal; metasternum finely and sparsely punc- 

 tate, punctures absent on caudal portion; abdomen rather coarsely 



