58 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 82 



Description. — Broadly oblong oval; head, elytra, mesosternum, 

 metasternum, abdomen, and legs black, feebly shining, elytra some- 

 times with bluish, purplish, or aeneous luster; prothorax pale with 

 three triangularly placed median black spots. Head with inter- 

 ocular space considerably more than half width of head; carina 

 narrowl}'^ produced; occiput and front except polished tubercles 

 distinctly and usually closely punctate ; entirely shining black. An- 

 tennae dark with somewhat paler basal joints, third joint shorter 

 than fourth or fifth, which are subequal, the fourth slightly longer. 

 Prothorax over twice as wide as long, somewhat convex, narrowed 

 anteriorly with sides nearly straight, distinctly alutaceous, not shin- 

 ing, finely punctate; pale with three small median black spots — 

 two roundish ones anteriorly and a more elongate median one. Scu- 

 tellum black. Elytra slightly convex, broadly oblong oval, with 

 humeri not prominent and with only a trace of intrahumeral sulcus ; 

 surface alutaceous, closely and distinctly punctate, feebly shining 

 Avith bluish, purplish, or aeneous luster. Body beneath with meso- 

 sternum, metasternum, abdomen, and legs shining black, indistinctly 

 and lightly pubescent. Length, 5.2 to 6.5 mm; width, 2.8 to 3.8 mm. 



Type locality. — ^Missouri. 



Distribution. — Vermont; Massachusetts (Chicopee, Fall Kiver, 

 Framingham, Lynn, Springfield) ; Rhode Island (Watch Hill) ; 

 New York (New Windsor, Staten Island, West Point) ; New Jersey 

 (Boonton, Clifton) ; Maryland (Bladensburg, Glen Echo) ; District 

 of Columbia; Virginia (Nelson County); Kentucky; Texas (Ard- 

 more. Cypress Mills, Llano, Texline, Wolfe City) ; Kansas (Clark 

 County, Douglas County, Ellis County, Garden City, Gove County, 

 Horace, Meade Count}^, Riley County, Oakley, Salina, Topeka, 

 Wichita) ; Iowa (Iowa City, Lake Okoboji, Moscow, Muscatine, 

 Silver Lake, Solon) ; Missouri (Greene County, Willard) ; Oklahoma 

 (Payne County) ; Wisconsin (Beaver Dam, Dane County, Madison, 

 Sturgeon Bay, Waupaca) ; Michigan (Ann Arbor, Belding, Niles) ; 

 North Dakota (University) ; South Dakota (Black Hills, Brook- 

 ings, Elmore, Volga, Watertown) ; Minnesota (Fergus Falls) ; Indi- 

 ana (Knox) ; Illinois (Algonquin, Champaign, Chicago, Elizabeth- 

 town, Forest City, Dubois, Havana, Quincy, Prairie du Rocher, Rock- 

 ford, Thompson Lake, Urbana) ; Washington (Pullman) ; Idaho 

 (Coeur d'Alene) ; Montana (Assiniboine, Bozeman, Gallatin, Hel- 

 ena) ; Colorado (Colorado Springs, Denver, Fort Collins, Logan 

 County, Manzanola, Olney, Rocky Ford, Sterling) ; Utah (Ogden, 

 Silver Lake) ; Wyoming (Chug water) ; New Mexico (Torrance 

 County, Beulah, Santa Fe County, Sandia Mountains) ; British Co- 

 lumbia (Aspen Grove, Chilcotin, Merritt, Midday Valley, RoUa) ; 

 Alberta (Edmonton, Medicine Hat) ; Manitoba (Aweme, St. Nor- 

 bert) ; Saskatchewan (Oxbow, Redvers). 



