352 HETEROPTEROUS HEMIPTERA. 



Length over one-fourth of an inch. 



Resembles the acutus nob., which however has the second 

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

 still more resembles planus F., 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 ; antennae 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. ^equalis. — Second and third joints of the antennae 

 equal, thoracic margin reflected. 



