INSECTS OF LOUISIANA. 307 



PETALOCHIRUS Beauv. 



P. biguttatus. — Hemelytra with a yellow vSpot beyond the 

 middle and another at base. 



Inhabits Louisiana. 



Body black : antennae brown : promuscis and feet dull honey 

 yellow : scutel at tip extending into an obtuse spine : hemelytra, 

 around the tip of the scutel a yellow spot, and an orbicular 

 one on each beyond the middle : abdomen yellowish on the 

 margin. 



Length seven-tenths of an inch. 



A fine insect, readily known by the two yellow spots on the 

 hemelytra. The disk which occupies the extremity of the ante- 

 rior tibiae, in this species is not confined to the extremity, but ex- 

 tends up the inner side of the tibiae, nor is its limit so definite as 

 in some other species. 



[Belongs to Pirates, -a,nd is JP. mutillarms Fabr. Syst. Rhyng. 

 280 : Herrich Schaffer, 8, pi. 269, fig. 829.— Uhler.] 



TETTIGONIA Latr. 



T. COAGULATA. — Head and thorax irrorate with dull yellow- 

 ish • anterior tibiae subclavate. 



Inhabits Louisiana. 



Body dusky, brownish : head depressed above, rather longer 

 than the width between the eyes, rounded before and bounded 

 by an obtuse edge ; not gibbous beneath ; obsoletely irrorate 

 with dull yellowish : thorax obsoletely irrorate with dull yellow- 

 ish, which on the scutel is still more obscure : hemelytra sub- 

 hyaline, immaculate, somewhat tinged with bluish towards the 

 tip: tergum blue-black, with a yellow lateral margin, broader 

 towards the [14] base: pleura dusky, irrorate with dull yellow- 

 ish : pectus yellowish : feet yellowish, more or less reticulate 

 with blackish on the thighs; anterior tibiae gradually a little 

 dilated to the tip and with their tarsi dusky ; intermediate tibiae 

 with a black line ; posterior tibiae with the obtuse spines of the 

 exterior side black, giving a regular series of black points : venter 

 yellow, segments black at their bases. 



Length under half an inch. 



