CEDEMERIDyE OF BOREAL AMERICA. 393 



Xanthochroa lateralis Mels. (Nacerdes) Proc. Phil. 

 Acad., 1846, p. 54. 



Xanthochroa signaticollis Had. Jourii. Phil. Acad., 2d Ser. i, p. 96. 



Form slender, elongate, black, suture and margin of 

 elytra yellow, head and thorax in great part yellow. An- 

 tenna black. Head yellowish, often piceous behind the 

 eyes, surface shining, sparsely punctate. Thorax scarcely 

 longer than wide, sides in front arcuate, posteriorly sinuate, 

 and somewhat dilated at base, color yellow, with a piceous 

 black space each side, surface sparsely and indistinctly 

 punctate, shining. Elytra densely punctate and opaque, 

 disc subcostulate, the third costa from suture very feeble. 

 Body beneath piceous, finely punctulate, last segment of 

 female yellow. Legs yellow, the tibia? in part and the 

 tarsi piceous. Length .28-. 40 inch. ; 7-10 mm. 



The fifth ventral of the male is elongate, slightly 

 broader at apex, elevated along the middle, deeply trian- 

 gularly emarginate. In the female the last ventral has 

 a small triangular emargination at apex, the surface 

 slightly concave, color yellow. 



Occurs in the southern Atlantic region. 



Xanthochroa testacea n. sp. 



Form slender, elongate, parallel, color above entirely 

 yellowish testaceous, a slight piceous area each side of 

 the thorax, another at the humeri extending in a variable 

 degree to the apex; metapectus and abdomen piceous. 

 Head sparsely, indistinctly punctate, shining. Thorax 

 as wide as long, sides arcuate in front, sinuately narrow- 

 ing posteriorly, surface shining, very sparsely punctate. 

 Elytra densely punctate, vaguely quadri-costulate, finely 

 pubescent. Body beneath piceous, the abdomen very 

 sparsely punctate. Legs pale. Length .36-. 42 inch.; 

 9—10.5 mm. 



Proc. Cal. Acad. Sci., 2d Ser., Vol. VI. ( 28 ) September 26, 1896. 



