352 HETEROPTEROUS HEMIPTERA. 



Length over one-four tli of an inch. 



Resembles the acuius nob., which however has the second 

 joint of the antennae longer and the ultimate joints equal. It 

 still more resembles planus ¥., but the antennae of that species 

 are obviously more robust. The penultimate joint of the antennae 

 is sometimes very dull and almost obsoletely whitish. 



2. A. RECTUS — Hemelytra not dilated at the humerus. 



Inhabits Missouri and Florida. 



Body fuscous, rather slender : head with an indented line each 

 side; an acute, projecting point before each eye; tip prominent, 

 obtuse; antennae, joints very slightly smaller towards the base; 

 second joint nearly as long as the third and fourth together; 

 the latter a little shorter than the third : thorax quadrilineate 

 and having the thicker abbreviated line near the exterior angle 

 very distinct ; scutel with the edge considerably elevated : 

 [ 797 ] hemelytra, corium rather long, the humerus not dilated, 

 but rectilinear with the remaining part of the edge ; grayish with 

 fuscous nervures. 



Length over three-twentieths of an inch. 



A small species ; sufficiently distinct from the preceding by the 

 rectilinear edge of the hemelytra. 



5. A. ORNATUS. — Hemelytra, abdomen and feet pale ; antennae 

 robust. 



Inhabits Indiana. 



Body blackish-fuscous : head with the process before the eyes, 

 prominent, acute ; antennse robust : thorax rather short ; sides 

 depressed and a little reflected ; edge regularly rounded : pos- 

 terior margin with about three glabrous, polished spots : scutel 

 concave towards the tip : hemelytra whitish, more or less spotted 

 with brown ; humerus prominent, rounded : abdomen pale rufous, 

 margin paler, with blackish lines : feet yellowish, thighs at base 

 and tibiae blackish, but paler on the posterior pairs. 



Length under one-fourth of an inch. 



Resembles quadrilineatus nob., but the polished thoracic spots 

 and the much more prominent and rounded humerus, not to 

 mention its coloring, readily distinguishes it. 



6. A. ^QUALis. — Second and third joints of the antennas 

 equal, thoracic margin reflected. 



