APPENDIX. 293 



description which Fabricius gives of the insect. He des- 

 cribes the thorax to be " obscure aeneus, nitens lateribus 

 rufescentibus," and the elytra" obscure aenea, nitidula: vitta 

 lata, fusca." Now, I have a specimen, taken near Phila- 

 delphia, which agrees very well with these characters, al- 

 though the thorax exhibits a tinge of rufous, and has the 

 additional character of an obscure yellowish-brown exte- 

 rior margin of the elytra, which might however, on a su- 

 perficial examination, be very readily overlooked. But 

 several specimens which we obtained in the North-west 

 Territory, though evidently the vittaia, difier so widely 

 from the quoted description, that they would probably be 

 considered as altogether new by an entomologist who had 

 not a specimen which could serve as a link to the Fabri- 

 cian specimen. These individuals all correspond perfect- 

 ly in having a bright rufous thorax, dark steel-blue elytra 

 with a narrow rufous fillet and lateral margin ; the venter 

 also is very dark steel-blue. 



H. marginata. Fulvo-sanguineous ; elytra with sanguine- 

 ous lines ; feet yellowish. 



Inhabits United States. 



H. marginata, Melsh. Catal. 



Head with an acute impressed line ; antennse dark ru- 

 fous, not surpassing the thorax ; thorax with dilated irre- 

 gular punctures ; anterior and lateral edge dull sanguine- 

 ous ; elytra serrate on all the outer edge ; sutural edge, 

 external edge, and four lines elevated, and with abbrevi- 

 ated sanguineous lines ; first line bifurcate at base ; third 

 line widely interrupted in the middle and confluent with 

 the fourth line near the tip and on the humeral tubercle ; 

 fourth line serrated ; humeral tubercle prominent ; inter- 

 stitial spaces with a double series of profound, dilated 

 punctures, separated by elevated lines ; tip of the elytra so 



Vol. II. 3S 



