OP PHILADELPHIA. 377 



Length to tip of hemelytra less than three-twentietlis of an 

 inch. 



A smaller species than the tartarea and semicrema, and the 

 thorax is not so slender at tip. I obtained many specimens on 

 Uupatorium maculatum, in the axilljB of the leaves, early in 

 July. 



4. M. GONiPHORA. — Thorax flattened before, subulate behind 

 Inhabits Missouri. 



Above greenish, minutely reticulate with yellowish rufous : 

 thorax greatly elevated, flattened before so as to form an acute 

 line each side, which meet at the greatest elevation, rather be- 

 fore the middle, from whence the curvature descends by an acute 

 carina to the tip, which is subulate and arquated : hemelytra, 

 three terminal cellules unequal. 



Length to tip of hemelytra three-tenths of an inch. 



Several specimens were presented to me by Mr. Nuttall, who 

 obtained them during his voyage up the Missouri river. 



5. M. FESTINA. — Thorax with a subacute line each side be- 

 fore, meeting behind the middle. 



Inhabits Florida. [ 244 ] 



Body yellowish-green : thorax tinarmed, carinate behind ; at 

 tip attenuated, subulate and complying with the general curva- 

 ture ; each side before a carinate line, meeting together at the 

 carina behind the middle, and with the carina tinged with ru- 

 fous ; front of the thorax not altogether flat, but a little convex : 

 hemelytra, three terminal cellules unequal ; the two costal ones 

 equal, as broad as long ; the inner one not obviously larger than 

 the others together, somewhat longer than broad. 



Length to tip of hemelytra one-fifth of an inch. 



The lateral prominent lines of the unarmed thorax, separate 

 this species from all those which I have described excepting go- 

 niphora, which, however, is larger, the thorax; more elevated, 

 and the lateral lines meet before the middle of the length of the 

 back. 



1830.] 



