HETEROPTEROUS HEMIPTERA. 351 



neath dull rufous in the middle : feet yellowish, annulate with 

 brownish. 



Length nearly nine-twentieths of an inch. 



Much larger than quadrlUneatns nob., which has short and 

 robust antennae, the second joint smaller at base, &c. Mr. Nuttall 

 presented me with an individual taken in Missouri, and I pos- 

 sess other specimens obtained in this State. 



2. A. ACUTUS. — Third and fourth joints of the antennae to- 

 gether, two-thirds the length of the second. 



Inhabits Florida and Indiana. 



Body fuscous : head incqual, with two longitudinal, indented 

 lines; an acute, projecting point before each eye: tip promi- 

 nent, obtuse : antennse black ; second joint elongated, narrower 

 at base : third and fourth joints equal ; taken together not more 

 than two-thirds the length of the second : thorax quadrilineate, 

 three or four very obvious denticulations on the anterior part 

 [796] of the lateral edge; scutel on the edge a little elevated; 

 hemelytra on the humerus dull yellowish with a denticulated 

 edge ; tergum with quadrate cinereous spots in a series within 

 the margin ; margin with obsolete pale spots and incisures : tibiae 

 paler than the thighs : venter tinged with rufous. 



Length over seven-twentieths of an inch. 



'LWq planus Fabr. ; but the second joint of the antennae of that 

 insect is shorter, cylindric, and the third and fourth joints alto- 

 gether are nearly equal in length to the third. 



It is abundant in Indiana as well as in Florida and varies in 

 having the nervures of the hemelytral membrane margined with 

 whitish. 



3. A. siMiLis. — Third and fourth joints of the antennae to- 

 gether as long as the second. 



Inhabits United States. 



Body brown : head inequal, with two longitudinal, indented 

 lines: an acute, projecting point before each eye; tip prominent 

 obtuse : antennae,, second joint cylindrical, very slightly thicker 

 towards the tip; third joint whitish, cylindric half as long as the 

 second ; fourth joint fuscous, a little shorter than the third and 

 narrowed a little toward the base : thorax quadrilineate, lateral 

 edge dentate : tergum slightly serrate on the lateral edge : be- 

 neath fuscous on the disk : feet brownish. 



