NORTH AMERICAN COLEOPTERA. 91 



Series C. 

 This series contains but two species each with yellow elytra, with 

 the black suture entire and a vitta from the umbone nearly to apex. 



AntennfE entirely black ; legs black, except the bases of the femora. 



trivittata. 



Antenuffi with three basal joints pale; middle and posterior legs pale, except 



knees and tarsi vittata. 



D. connexa Lee, Proc. Acad. 1865, p. 212; Jacoby, Biol. Cent.-Amer. vi, 

 pt. 1, p. 549, pi. xxxii, fig. 20.— Oblong-oval, narrower in front, moderately con- 

 vex, pale yellow, elytra with brown ornamentation ; metasternum, tibise and 

 tarsi piceous. Antennse a little longer than half the body, slender, piceous, 

 three basal joints pale, third joint slightly longer than the fourth and twice as 

 long as the second. Head pale castaneous, smooth, clypeus sparsely punctate. 

 Thorax wider than long, slightly narrower at apex, sides arcuate in front, sinuate 

 behind the middle, disc moderately convex, sparsely obsoletely punctate. Elytra 

 slightly broader behind the middle, sparsely finely punctate, a broad brown band 

 occupying nearly the basal half of the elytra, the posterior border sinuous, at 

 sides emarginate, not reaching the border of the elytra, enclosing on each side 

 an oval pale spot of variable size, one-third from apex is an arcuate row of small 

 brown spots, two on each side. Body beneath sparsely pubescent, abdomen finely 

 punctulate ; tibife with a well-marked carina on the outer edge extending from 

 the knee to the apex. Length .28 inch. ; 7 mm. 



Male.— The last ventral segment is broadly truncate. 



Female.— 'La,st ventral slightly prolonged and oval at tip. 



Very little variation has been observed in this species, the color 

 of the head and the markings on the elytra may be lighter or darker, 

 but never pass beyond the brown color. 

 Occurs in Texas and Mexico. 



D. picticornis n. sp. — Form and somewhat like connexa in coloration. 

 Antennse slender, more than half the length of the body ,joints 1-3 pale, 4-8 

 piceous, 9-10 pale, 11 piceous, joints 2-3 small, the third a little longer, the two 

 together a little longer than the fourth. Head black, smooth. Thorax broader 

 than long, slightly narrower in front, sides anteriorly feebly arcuate, posteriorly 

 slightly sinuate, disc convex, color slightly reddish, surface sparsely finely punc- 

 tate. Elytra broader behind the middle, obsoletely punctate; yellow, with a 

 broad piceous black band, similar in form to that of connexa, and a crescentic 

 band one-third from apex. Abdomen very sparsely punctate, yellow; tibise 

 carinate on the outer edge. Length .26 inch. ; 6.5 mm. 



Male not seen. The last ventral of female oval at tip. 



This species bears a deceptive resemblance to connexa, and might 

 readily be thought a variety of it, but the form of the second and 

 third joints of the antennjB, together with the arrangement of the 

 colors of the joints, will at once distinguish it. 



Occurs in Texas, locality unknown. 



TRANS. AM. ENT. SOC. XX. JUNE, 1893. 



