142 MARTIN JACOBY 



Of parallel , depressed shape , the head broad , impunctate at 

 the vertex, flavous, frontal elevations in shape of narrow trans- 

 verse ridge, lower portion of face deeply bifoveolate or excavate, 

 the anterior margin of the clypeus straight, labrum broad, fla- 

 vous, antennae extending below the middle of the elytra, flavous, 

 the basal joint rather short and stout , the second very small , 

 the third larger than the fourth, the seventh broadly widened 

 towards the apex, the terminal joints more slender, thorax one 

 half broader than long , the sides straight at the base , suban- 

 gulate before the middle, the surface impunctate, flavous, deeply 

 bifoveolate , scutellum flavous , elytra wider at the base , than 

 the thorax, metallic green or purplish, each elytra with about 

 eight longitudinal costae, the interspaces closely transversely 

 rugose-punctate , breast and legs flavous , tibiae unarmed , the 

 first joint of the posterior tarsi as long as the following two 

 joints together, claws appendiculate, anterior coxal cavities closed, 

 abdomen blackish. 



Hab. Si-Oban. 



This species agrees in its principal structural characters with 

 its congeners, but the antennae of the male are of different 

 construction, and in this, as well as in other allied genera, nearly 

 every species shows some differences in this respect in the male 

 insect. D. costatipennis seems allied to D. smaragdina, Duviv. but 

 differs in the colour of the underside and in the impunctate 

 thorax. 



24. Sermyloides bicolor, sp. n. — Below black, above testa- 

 ceous, thorax extremely minutely punctured, elytra strongly and 

 closely punctured. 



Mas. The third joint of the antennae curved and widened. 



Length 3 1 / 2 lines. 



Head impunctate, the frontal elevations but slightly raised, 

 transverse , lower part of the face depressed , forming a single 

 piece, palpi thickened, antennae extending nearly to the apex 

 of the elytra, entirely flavous, basal joint slender and curved, 

 the second very short, the third widened at the apex and curved, 

 the following joints more elongate , thorax more than twice as 



