HETEROPTEROUS HEMIPTERA. 349 



third and tip, which are unarmed rectilinear ; beneath piceous- 

 black : feet pale yellowish. 



Length to the tip of hemelytra three-twentieths of an inch. 



The larva is spinous, fuscous, with a large yellowiah spot each 

 side of the middle, and before the middle a broad yellowish vitta. 

 The species is very common. 



2. T. CINEREA. — Not dilated, hemelytra with six or seven 

 marginal spots. 



Inhabits United States. 



Body gray ; not dilated on the margin ; with much dilated 

 punctures ; head deeply bifid at tip and with a short robust 

 spine between the eye and antennae; antennae, basal joint spheri- 

 cal, abruptly smaller at base ; second joint not longer than the 

 first, and less dilated ; thorax with four elevated lines, obsolete 

 behind ; anterior lateral margin a little dilated : hemelytra 

 covered, like the thorax, with dilated, approximate punctures, 

 [794] and having on the lateral margin a series of six or seven 

 black spots ; beneath grayish, more or less varied with brown : 

 venter brownish, with spots or lines of grayish. 



Length to tip of hemelytra more than one-tenth of an inch. 



In form much resembling T. cardui F. It is not uncommon. 



3. T. MUTicA. — Thorax and scutel with a single line; heme- 

 lytra with a brown spot. 



Inhabits Indiana. 



Body grayish-brown, unarmed, not dilated on the margin ; with 

 much dilated punctures: antennae, second joint rather thicker 

 than the first : thorax, with a paler, slender, glabrous line, and 

 paler line each side : scutel with a paler line on the middle, and 

 a short one each side, not elevated ; hemelytra like the thorax 

 with dilated approximate punctures ; on the middle an obvious 

 darker, irregular spot or band ; membrane reticulate with brown j 

 beneath dusky : tibia3 paler. 



Length to tip of hemelytra over- one-tenth of an inch. 



4. T. PLEXUS. — Thorax and scutel trilineate ; hemelytra ob- 

 scurely and minutely reticulate. 



Inhabits United States. 



Body brownish, more or less tinged with yellow, with dilated 



