92 GEO. H. HORN, M. D. 



D. triciliciit Say, Jouru. Acad, iii, p. 457; ed. Lee. ii, p. 221; suffriani 

 Jacoby, Biol. Cent.-Amer. vi, pt. 1, p. 551, pi. xxxii, fig. 3. — Form oblong, feebly 

 convex, color yellow; head, metasternum, tibiae and tarsi black, elytra with 

 three transverse bands and a small apical spot black. Antennae piceous, two 

 basal joints paler. Head impunctate. Thorax very little wider than long, 

 slightly narrowed in front, sides anteriorly feebly arcuate, then slightly sinuate 

 to base, anterior angles slightly prominent, disc convex, smooth. Elytra sparsely 

 punctate, yellow, with three transverse bands which do not attain the side mar- 

 gin, the basal band crosses the suture and sends a short branch backward, the 

 second and third bands are interrupted by the suture, the apical spot is small 

 and at the sutural angle. Abdomen yellow, sparsely pubescent, finely punctate; 

 tibise carinate on the outer edge. Length .22 — .26 inch. ; 5.5 — 6.5 mm. 



3{ale. — Last ventral truncate and broadly eniarginate ; first joint of front tarsi 

 dilated. 



Female. — Last ventral narrowly oval at tip. 



Occurs from Colorado southward to Arizona, extending into Mex. 



D. duocleciiiipiiiictata Fab., Syst. Ent. p. 103; Oliv., Ent. vi, p. 628. pi. 

 2, fig. 31 ; tenella Lee, Proc. Acad. 1858, p. 58. — Oblong-oval, narrower in front, 

 moderately convex, pale yellowish green, each elytron with six piceous black 

 spots of variable size. Autennai slender, longer than half the body, piceous, 

 three basal joints pale, joints 2-3 small, the third the longer, the two together 

 about as long as 'the fourth. Head black, smooth, vertical impression deep. 

 Thorax wider than long, slightly narrower in front, sides slightly arcuate ante- 

 riorly, then feebly sinuate; disc convex, with a moderately deep fovea each side 

 of middle, surface smooth ; scutellum piceous. Elytra wider behind the middle, 

 sparsely obsoletely i)unctate; color yellow, with a slight tinge of green, on each 

 side of the scutellum an oblong spot obliquely placed, another oblong spot on 

 uinboue ; at middle two spots placed slightly obliquely, one-third from apex two 

 spots more obliquely placed ; metasternum piceous. Abdomen yellow, sparsely 

 punctate; tibise distinctly carinate on the outer side. Legs piceous, the basal 

 half of the femora pale. 



Male. — Last ventral truncate and broadly emarginate ; front tarsi not dilated. 

 Female. — Last ventral narrowly oval at tip. 



This species does not vary greatly from a normal standard. Speci- 

 mens are occasionally seen in which the spots show a tendency to 

 elongate and unite in a longitudinal direction. 



Var. tenella Lee. — This name was suggested for those forms in 

 which the spots are reduced to a very small size, and in which the 

 jiostei'ior series may be entirely lost. In this variety the antenna' 

 are usually paler, and the femora are more than half pale. 



This species occurs over the entire eastern region from Canada 

 southward to Texas, extending into Arizona, and even to southern 

 California. It doubtless occurs in Mexico also. The variety tenella 

 occurs only in the extreme southwest. 



