56 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 82 



Distrihution. — Northwest Territories; Quebec (St. Johns); Sas- 

 katchewan (Oxbow) ; Alberta (Blackfalds) ; Manitoba (Aweme) ; 

 Massachusetts (Cambridge, Fall River, Fitchburg, Framingham,^ 

 Nantucket, Sherborn, Springfield) ; Connecticut (Hartford) ; New 

 York (Long Island, Potsdam) ; Pennsylvania (Germantown, Harris- 

 burg, Philadelphia) ; Maryland (Plummers Island) ; District of 

 Columbia; Virginia (Jonesville, Nelson County); Louisiana (New 

 Orleans) ; Texas (Columbus, Cypress Mills, Dallas, Greenville, 

 Mesquite, Piano, Victoria) ; Kansas (Cherokee, Douglas County, 

 Kansas City, Lawrence, Topeka, Riley County) ; Nebraska (Mal- 

 colm) ; Iowa (Iowa City, Lake Okoboji, Muscatine, Solon) ; Wis- 

 consin (Beaver Dam, Madison) ; Indiana (Franklin, Knox) ; Michi- 

 gan (Detroit) ; Illinois (Algonquin, Bloomington, Centralia, 

 Chicago, Dongola, Grand Tower, Homer, La Grange, Mahomet. 

 Muncie, Oakwood, Peoria, Quincy, Riverside, St. Joseph, Spring- 

 field, Thompson Lake, Urbana) ; Ohio (Columbus). 



Food 'plants. — Chickweed {StelJai'ia media) , Chenopodium alhum^ 

 Amaranthus splnosus, spinach, beet (Chittenden). 



Remarks. — This species, a well-known garden insect, is dis- 

 tinguished from D. triangularis., found on similar food plants, by 

 its lack of pronotal spots and paler abdomen. Both species have 

 dark heads and legs, but in xanthomelas the base of the femora is 

 pale, and often the posterior femora have a pattern similar to that 

 of politula.) in which the pale basal half is diagonally marked off 

 from the apical dark half. Some specimens from Canada are much 

 smaller, but no structural differences are apparent and the aedeagi 

 are like those of the larger ones. 



DISONYCHA XANTHOMELAS var. CERVICALIS LeConte 



Disonycha cervicalis LeConte, Smithsonian Contr. Knowl., vol. 11, p. 25, 1859 

 (Kansas and Georgia; type in LeConte collection, Mus. Comp. Zool.). 



Desorlption. — Head shining, dark brown (not black), a furrow of 

 punctures as in typical xanthomelas on each side of front, and a few 

 scattered j^unctures across front; antennae with third, fourth, and 

 fifth joints subequal, basal joints and last apical one paler. Pro- 

 thorax as in xanthomelas. Elytra oblong oval with humeri not 

 marked and with only a slight trace of intrahumeral sulcus; sculp- 

 ture and coloring similar to typical xanthomelas. Body beneath en- 

 tirely pale; legs except at base dark, the posterior femora with a 

 paler streak on the inside. 



Type locality. — Kansas (as here restricted). 



Distrihution. — Kansas ; Georgia. 



Remarks. — There is only one specimen of this in the LeConte col- 

 lection, a female bearing a green label, indicating that it is the 

 Kansas specimen mentioned by LeConte. The other specimen re- 



