NORTH AMKRICAN COLEOPTERA. 97 



surface rather broadly striate, strife biseriately punctate, intervals convex, sub- 

 costiform, color pale yellow, a sutural black vitta occupying two Intervals ex- 

 tending from base to apex, a humeral vitta nearly reaching the apex on the in- 

 tervals 6-8. Body beneath piceous. Legs yellow, the knees, the anterior tibiae 

 and tarsi and the tips of the middle and posterior tibiae and their tarsi piceous; 

 tibiae without trace of carina. Length .18 — .24 inch. ; 4.5 — 6 mm. 



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



Female- -1,3.51 ventral oval at tip. 



This species is remarkably constant iu its characters for one so 

 widely diffused. 



Abundant over the entire eastern United States from Canada 

 southward. 



I>. trivittata Mann., Bull. Mosc. 1843, p. 309. 



Very closely resembling vittata, differing in the following particu- 

 lars : 



Antennae entirely piceous. Thorax bifoveate, the two fovea) coalescing poste- 

 riorly. Legs entirely black, except the bases of the femora. 



3Iale. — Last ventral feebly truncate, slightly emarginate ; first joint of front 

 and middle tarsi distinctly broader and thicker. 



Female. — Last ventral oval at tip ; tarsi not dilated. 



This species occurs throughout California, where it replaces vittata 

 of the Eastern States. 



D. amcenula and D. odonotata described by Boheman, and placed 

 doubtfully in our lists, are from the Pacific islands, and do not occur 

 in our fauna. 



FHYL,L,OBROTICA Eedt. 

 Head free, transversely grooved between the eyes. Eyes nearly 

 round, prominent ; labrum short, feebly emarginate ; maxillary palpi 

 not stout, the third and fourth joints obconical, the latter smaller 

 and acute at tip. Antennse slender, longer and more slender in the 

 female, first joint stout, second and third usually shorter, the third 

 longer than the second, four to eleven nearly equal in length. Thorax 

 transversely quadrate, sides nearly straight, disc usually with de- 

 pressions ; scutelium oval at tip. Elytra parallel, without lateral 

 margin and without separate epipleurse; prosternum obliterated be- 

 tween coxse, the cavities open behind ; metasternal parapleur^ rather 

 wide and parallel; ventral segments one to four equal in leno-th, 

 fifth much longer. Legs rather slender, tibi?e without spurs ; first 

 joint of hind tarsus scarcely as long as the next two, claws appen- 

 diculate and divaricate. 



TRANS. AM. ENT. SOC. XX. (13) JUNE, 1893. 



