NORTH AMERICAN COLEOPTEKA. 307 



The males are said by Chapuis to differ from the females in having 

 the first joint of the anterior tarsi dilated and the pygidium trans- 

 versely striate. 



Four species occur in our fauna : 



Apices of elytra very deeply sinuous at apex sinuata. 



Apices of elytra conjointly rounded. 



AntennsE rufotestaceous ; legs (except the posterior femora) rufotestaceous or 



brownish ; thorax very distinctly punctate. 



Form more obloug ; interstrial spaces with very few punctures borealis. 



Form more ovate; interstrial spaces with numerous fine punctures. .ovata. 



Antennae and legs piccous ; thorax very indistinctly puuctate. 



Thorax greenish black, elytra blue green liboiioti. 



D. siniiata n. sp. — Broadly oval and convex, very like a Phxdon, beneath 

 piceous, thorax above black bronze, elytra bluish green. Antennse entirely rufo- 

 testaceous. Head rufescent, not distinctly punctate. Thorax more than twice 

 as wide at base as long, narrowed in front, sides moderately arcuate, disc moder- 

 ately convex, the surface slightly rugulose, the punctuation moderate in size, 

 sparse and indistinct. Elytra not wider at base than the thorax, broadly oval, 

 the apices deeply sinuous, the sutural angle obtuse, disc convex, disc striato- 

 puuctate, stripe not impressed, punctures moderately coarse and deep, but not 

 closely placed, intervals flat, moderately closely, finely punctate, with a row of 

 distant coarser punctures, finer than those of the striae. Body beneath piceous. 

 Abdomen moderately closely punctate and slightly wrinkled transversely. 

 Legs brownish, tibise and tarsi a little paler. Length .12 inch. ; 3 mm. 



This species is even more broadly oval than ovata, resembling at 

 first sight Phcedo7i viride. It is especially distinguished by the rather 

 deep sinuation of the apices of the elytra. This character seemed 

 at first sight as if an accidental deformity, but the exact symmetry 

 of the two sides, together with the other characters, have satisfied 

 me that the species is well founded. 



One specimen, Dallas, Texas. 



D. borealis Chev. — Oval, slightly oblong, convex, piceous, surface distinctly 

 bronzed, either feneous, slightly cupreous, or bluish. Antennas pale rufotesta- 

 ceous. Head shining, sparsely, indistinctly punctate. Thorax rather more than 

 twice as wide at base as long, apex but little wider than the length, sides arcu- 

 ate, disc convex, closely punctate, with coarse and fine punctures intermixed. 

 Elytra not wider at base than the thorax, the sides of both continuous, umbone 

 moderately prominent, disc convex, with strise of coarse punctures, which are 

 rather closely placed, some of the strise rather irregular, intervals broad and flat, 

 with but few fine punctures, the alternate intervals 2-4-6 with coarser punctures, 

 striiB not obliterated at apex. Body beneath and posterior femora piceous, 

 slightly bronzed. Abdomen shining, sparsely punctate. Anterior four legs and 

 posterior tibite rufotestaceous. Length .12 inch. ; 3 mm. 



