208 GEO. H. HORN, M. D. 



9. D. teimicornis n. sp. — Oval slightly oblong, facies rather robust, jiale 

 yellow, surface very sbiuing as if varnished, elytra with a single, slender, median 

 vitta; thorax with two piceous spots. Antenuaj nearly two-thirds the length of 

 body and slender, piceous, the three basal joints nearly entirely yellow. Head 

 smooth, a very few large punctures near each eye, frontal carina obtuse, tuber 

 cles feeble. Thorax twice as wide as long, narrowed in front, sides feebly arcu- 

 ate, margin narrow, disc regularly convex, surface polished and with two small 

 black spots in front. Elytra wider at base than the thorax, humeri distinct, but 

 obtuse; umbone distinct, surface shining, very obsoletely punctate, a single, 

 slender, median vitta on each elytron, suture very narrowly piceous posteriorly. 

 Body beneath entirely yellow. Abdomen rather densely punctulate, pubescence 

 very distinct. Legs yellow, tai'si brown. Length .26— .30 inch. ; 6.5— 7.5 mm. 



The four specitnens before me agree perfectly with the above de- 

 scription. The lateral margin is slightly reddish in color, and would 

 lead one to suspect a marginal vitta, but the same appears in alter- 

 nafa. It is a little more robust than quinqiievittata, and may be 

 readily known by the long, slender antennse. 



Occurs in southern Arizcma (Morrison). 



10. D. (liscoidea Fab.— Oval, slightly depressed. Antennse half the length 

 of the body, black, the lower side of basal joint piceous. Head (and labrum) 

 yellow, surface smooth, a small fovea at the upper inner border of the eye, fi-ontal 

 carina very obtuse, the tubercles indistinct. Thorax more than twice as wide as 

 long, narrowed in front, sides slightly ai-cuate, margin narrow, a little wider in 

 front, disc regularly convex, smooth, shining, yellow and immaculate. Scutellum 

 yellow. Elytra scarcely wider than the thorax, humeri almost entirely obliter- 

 ated, umbone moderate, surface distinctly and moderately closely punctate, color 

 yellow, with a large, oval, discal black spot not reaching the apex and usually 

 having a very narrow pale basal border. Body beneath entirely yellow. Abdo- 

 men rather closely punctate, the pubescence distinct, but not conspicuous. Legs 

 yellow, the outer side of the tibise and the tarsi black. Length .22— .30 inch. ; 

 5.5—7.5 mm. 



This species varies but little ; the black discal space rarely reaches 

 the basal margin, in which case the scutellum is black. The space 

 varies in width, and at times the yellow border of the elytra is rather 

 narrow. When recent the yellow is tinged with red as observed in 

 nearly all the species. 



Occurs from North Carolina to Texas. 



11. D. fiiiierea Eand. — Oval, entirely black, with a velvety, subopaque 

 surface, last segment of abdomen and sides of the fourth yellow. Antennse 

 scarcely half as long as the body, rather stout, the outer joints short. Front 

 smooth, one large puncture and several smaller near each eye, the frontal carina 

 very flat, the tubercles indistinct. Thorax barely twice as wide as long, narrowed 

 in front, the sides feebly arcuate, margin very narrow, disc regularly convex, 

 impunctate, surface minutely alutaceous. Elytra not wider at base than the 

 thorax, humeri rounded, umbone indistinct, surface minutely, obsoletely punc- 



