342 ACADEMY OF NATURAL SCIENCES 



slightly impressed line : antennae and palpi dull rufous : elytra 

 destitute of striee or lines : beneath reddish-brassy, covered with 

 whitish hair : feet very dark rufous. 



Length nearly three-tenths of an inch. 



Resembles the preceding, but is always smaller, and it may be 

 at once distinguished from it by the color of the hair, which on 

 the superior surface is decidedly ferruginous. 



CHRYSOMELA Linn. Latr. 



1, C. CiERULEiPENNis. — Blue polished ; thorax and feet ru- 

 fous ; antennae and tarsi black. 



Head punctured, blue-black : antenna? black, basal joint ru- 

 fous beneath and at tip : thorax bright rufous, with numerous 

 punctures ; an obsolete transverse dusky line on the anterior sub- 

 margin, and another on the posterior submargin : scutel blue : 

 elytra polished blue, numerously punctured, the punctures irre- 

 gularly situated, sometimes confluent : beneath blackish-blue : 

 feet pale rufous : tarsi black : anus rufous. [ 297 ] 



Length more than three-twentieths of an inch. 



A beautiful and rare species, an inhabitant ofthe North West 

 Territory. I received a specimen from Mr. John P. Brace of 

 Litchfield, and another from Dr. T. W. Harris. 



This is the very abundant C. polygoni, which is probably in- 

 troduced from Europe. — Leg.] 



2. C. spir^a[e]. — Green; elytra pale yellow, with green spots, 

 a common and sutural line trifid at base. 



Head dark green, tinged with brassy : antennae and palpi ru- 

 fous : thorax dark green, tinged with brassy : elytra pale yellow, 

 sometimes tinged with rufous : each with about seventeen un- 

 equal small green spots ; a larger lunate one originating on the 

 humerus ; a common green sutural line, which sends off a lateral 

 short branch on each side near the base : beneath blackish-green : 

 feet rufous. 



Length a quarter of an inch. 



I received several specimens from Dr. Jno. F. Melsheimer, 

 under the name which I have adopted. He informed me that 

 he found them on the Spiraea opuUfolia Muhl. Catal. I have 

 also found them near Philadelphia, and in Missouri. It is very 



[Vol. V. 



