OP PHILADELPHIA. 221 



duces an angle at its anterior termination on the middle of the 

 edge. 



[Belongs to Adimonia, — Lec] 



3. G. DORSATA. — Pale yellowish ; elytra blue, with a yellow 

 outer margin and tip. 



Inhabits Arkansa. 



Body pale yellowish : head black on the vertex : antennae 

 black-brown : thorax immaculate ; punctures [ 457 ] obsolete : 

 scutel blackish-bronze : elytra irregularly punctured, greenish- 

 blue ; exterior margin and tip yellow ; an indented, abbreviated 

 line on the basal middle : feet with a blackish line above. 



Length one-fourth of an inch. 



Found on the banks of the Arkansa above the Verdigris. 



[Unknown to me. — Leg.] 



4. Gr. CIRCUMDATA. — Yellowish J antennae black; elytra pur- 

 plish-black, with a yellow border and suture. 



Inhabits Arkansa and Missouri. 



Body yellowish : head impunctured : antennae black : thorax 

 impunctured, transversely-quadrate ; edges nearly rectilinear ) 

 scutel yellow: elytra with minute, distant punctures, blackish- 

 purple ; suture, exterior margin, and tip, yellow : beneath pale 

 yellow. 



Length less than one-fourth of an inch. 



The basal joint of the antennse is sometimes yellowish. 



[Perhaps a Phyllohrotica described by Fabricius as G. di's- 

 coidea ; but that species has usually the first three joints of the 

 antenna yellow, and the thorax is bifoveate. — Leg.] 



5. G. TRiciNCTA. — Yellowish ; head, three elytral bands, and 

 terminal dot, black. 



Inhabits Arkansa. 



Head black : thorax yellowish, subquadrate : scutel black : 

 elytra yellowish-white, with three equidistant, dilated, black 

 bands, the first of which is uninterrupted and basal, not attaining 

 the lateral edge, and at the suture extending in a common line 

 near to the second band ; second band nearly central, and with 

 the third, not attaining the exterior edge, and interrupted at the 

 1824.] 



