426 
The Ohio Naturalist. 
[Vol. IX, No. 3 . 
Mexico and from the Mississippi to the Pacific. It occurs 
sparingly farther east. The species is quite numerous at San¬ 
dusky, Ohio, and has also been taken at Georgesville and 
Cincinnati. 
D. crenicollis. Say. Oval, slightly narrower in front. Head either 
entirely yellow or with occiput piceous. Scutellum black. Pro¬ 
thorax beneath yellow. Metasternum black, abdomen yellowish or 
pale brown, densely punctured and with a conspicuous silken pubes¬ 
cence. Femora reddish yellow, piceous along the upper edge, tibia 
and tarsi piceous. Length 5.5-6.5 mm. 
This species occurs from New York to southwestern Texas 
and Mexico and has been taken in Ohio at Cincinnati. 
D. caroliniana. Fab. Oval, slightly narrower in front. Head entirely 
yellow, entirely smooth except a punctured fovea at the upper inner 
border of the eye. Thorax with two piceous spots of variable size 
behind the apical border. Scutellum black. Body beneath reddish 
yellow. Epiplurae entirely piceous, sometimes entirely yellow. 
Abdomen closely punctate, pubescence distinct. Legs reddish 
yellow, tibia at tip and tarsi piceous. Length 5.—6.5 mm. 
This species occurs from Pennsylvania to Florida and has been 
taken at Columbus, Ohio. 
D. glabrata. Fab. Oblong oval, surface very shiny, as if varnished. Head 
variable in color, often entirely black or entirely yellow. Thorax 
yellow with a narrow median spot, often indistinct. Scutellum black. 
Body beneath yellow, posterior portion of metasternum rarely 
piceous. Abdomen finely alutaceous, sparsely punctate. Legs 
yellow, tips of tibia and tarsi piceous. -Length 5.-5.5 mm. 
Occurs from Georgia to Arizona ani has been reported from 
Columbus and Cincinnati, Ohio. 
D. abbreviata. Mels. Oval, slightly oblong. Head yellow, surface smooth, 
a rounded punctured fovea at the upper and inner border of the eye. 
Scutellum yellow. Body beneath and epiplurae yellow. Abdomen 
sparsely punctate, shining, pubescence short. Legs yellow, the 
outer side of the tibia and tarsi black. Length 6.-8.5 mm. 
Occurs from the Middle States to Florida and Texas, extend¬ 
ing into Mexico. Also reported from Columbus and Cincinnati, O. 
D. triangularis. Say. Form oval, rather depressed, feebly shining. 
Entirely black, thorax reddish yellow with three black spots arranged 
in a triangle. Head entirely black. Prothorax beneath yellow. 
Abdomen coarsely punctate, pubescence short and indistinct. Legs 
entirely black. Length 5.-6.5 mm. 
Occurs in the entire region east of the Rocky Mountains, 
including Canada. Reported in Ohio from Columbus and 
Cincinnati. 
D. xanthomelaena. Dalm. Oval, slightly depressed, feebly shining, 
thorax yellow, elytra dark blue. Head black with a few coarse and 
deep punctures, irregularly placed. Prothorax beneath yellow, meta¬ 
sternum black. Abdomen entirely yellow, densely punctate w'ith dis¬ 
tinct pubescence. Femora yellow at basal half, (sometimes entirely 
black) the apical piceous, also the tibia and tarsi. Length 5.5 mm. 
Occurs from the New England States to Kansas, Texas and 
Florida. Reported in Ohio from Columbus and Cincinnati. 
