INSECTS OF LOUISIANA. 303 



rax is narrower in proportion to the width of the elytra, and the 

 impressed line is much less profound. 



2. A. ocreata. — Pale honey-yellow; antenna, tibiae and tarsi 

 black. 



Inhabits Louisiana, 



Body pale honey-yellow; antennae, excepting the first and 

 second joints, black; thorax on the posterior submargin having a 

 transverse groove, which does not reach the lateral margin, but 

 at its extremities it is abruptly reflected to the posterior edge : 

 elytra destitute of striae ; feet with the knees, tibiae, and tarsi 

 black. 



Length three-twentieths of an inch. 



Many species have the groove on the posterior submargin of 

 the thorax, such as ignita Illig. helxines Fabr., &c. but in the 

 present species this groove, at each of its extremities, is abruptly 

 turned backward and terminates at the posterior edge of the tho- 

 rax. 



HEMIPTERA. 



PENTATOMA Oliv. 



1. P. BIFIDA. — Metasternum elevated and bifid at the tips 



Inhabits Louisiana. 



Body oval, pale ochre-yellow, with the impressed puncture- 

 dusky : head very short, wide and obtuse : antennae, second joint 

 rather larger than the third ; last joint rather [8] longer than the 

 penultimate: thorax, posterior angles rounded, not prominent; 

 punctures distinct, very obvious; an impressed submarginal an- 

 terior line, curving backward towards the posterior angles, and 

 another near the edge of the anterior emargination : scutel, punc- 

 tures remote ; white at tip ; hemelytra, punctures nearer to 

 other : tergum brownish, margin paler : beneath paler than above ; 

 intermediate and posterior pairs of feet widely separated trans- 

 versely by the metasternum (Kirby) which is more prominent 

 than the coxae, impunctured, bifarious at each extremity, ante- 

 riorly terminating midway between the anterior and intermediate 

 feet and receiving the extremity of the very short promusci 

 teriorly receiving the prominent point of the epigastrium : venter 

 with an obtuse slightly elevated carina. 



Length over two-fifths of an inch. 



