96 GEO. H. HORN, M. D. 



Very little variation has been observed, except in one specimen, 

 in which the middle vitta tends to disappear. 



Occurs near the Raton Mountains and at Fort Union, N. Mex. 



D. blandiila Lee, Trans, Am. Ent. Soc. ii, 1868, p. 58. — Oval, oblong, yel- 

 lowish white, head and metasternura piceous. Antennae brown, paler at base, 

 nearly three-fourths the length of body, joint 2 small, 3 nearly as long as four. 

 Head smooth, vertical fovea feeble. Thorax one-third wider than long. Head 

 smooth, vertical fovea feeble. Thorax one-third wider than long, sides slightly 

 arcuate in front, feebly sinuate posteriorly, disc smooth, with two vague fovea, 

 which tend to meet posteriorly. Elytra sparsely punctate, distinctly subsulcate, 

 the humeral carina feeble, color pale yellow, with a short brownish vitta from 

 the scutellum and from the umbone. Abdomen nearly smooth. Legs i)ale yel- 

 low, tarsi piceous; posterior tibiae carinate near base only. Length .20 inch.; 

 5 mm. 



Male. — Last ventral truncate. 

 Female. — Unknown. 



This species resembles virgifera in color and markings, but may be 

 known by the structure of the antennre, the broader thorax and color 

 of the legs. 



Occurs near the Smoky Hill River, New Mexico. 



I>. TiiiC'ta Lee, Proc. Amer. Philos. Soc. xvii, 1878, p. 416.— Oblong oval, 

 form of vittata, above black, thorax yellow, elytra with the side margin and an 

 entire median vitta yellowish white. Antennae three-fourths the length of the 

 body, piceous; joint two small, the third nearly as long as the fourth. Head 

 black, "smooth, vertical fovea small. Thorax slightly wider than long, sides 

 feebly arcuate in front, slightly oblique behind, disc smooth, bifoveate ; scutellum 

 black. Elytra rather coarsely and closely punctate, the surface vaguely subsul- 

 cate, the humeral carina not present, color black, side margin to suture and a 

 vitta from base to apex ivory-white; metasternum piceous, abdomen and base 

 of femora yellow. Legs otherwise black ; tibiae carinate near the base only. 

 Length .16 — .18 inch.; 4 — 4.5 mm. 



The only specimen before me is a female having the broadly oval 

 apex to the last ventral segment. 



The median vitta on each elytron resemble the so-called ivory 

 vitta seen in many Cerambycidse. 



Occurs in Georgia and Florida at Capron. 



I>. vittata Fab., Syst. Ent. p. 122; melanocephala Fab., loc. cit. p. 118 ; Oliv., 

 Enc. Meth. vi, p. 590; Ent. vi, p. 633, pi. 3, fig. 38; americana Gmelin, ed. Linn, 

 i, 4, p. 1715; stolata Grael., loc. cit. p. 1724. — Oblong-oval, pale yellow above; 

 head, a sutural and humeral vitta on each elytron black. Antennae more than 

 half the length of the body, the three basal joints partly pale, joint two small, 

 the third nearly as long as the fourth. Head black, smooth, ventral fovea rather 

 large. Thorax one-fourth wider than long, sides arcuate in front, slightly sin- 

 uate posteriorly, disc deeply bifoveate; scutellum black. Elytra slightly oval. 



