HETEROPTEROUS HEMIPTERA. 311 



2. T. fimbriata nob., Ainer. Entoin. vol. 3. much resembles 

 T. diana F., which, however, is somewhat larger, with fulvous 

 markings and blackish antennas and feet. The latter is a [756] 

 southern species and I have obtained many specimens from Nov, 

 Orleans, preserved in a solution of muriate of mercury. 



THYREOCOMS Schrank. 



T. histeroides. — Blackish, antennae dull honey-yellow. 



Inhabits United States. 



Body oval, greenish-black, polished, with rather small, not 

 dense or profound punctures; antennae dull honey-yellow: feet 

 dark piceous. 



Length from over three-twentieths to one-fifth of an inch. 



Resembles T. scarabaeoides Linn., but is larger, the puncturing 

 is less profound and not so dense. The lateralis F. has the mar- 

 gin of the hemelytra white. It is a common insect and varies in 

 magnitude. 



Nuttall presented me with a large individual from Arkansaw. 



[This is Corimelaena nitiduloides Wolff, Icones Cimicum, 98. 

 tab. 10, fig. 92, which dating in 1802 has priority. — Uhler.] 



2. T. albipennis. — Fulvous; hemelytra white. 



Inhabits Missouri. 



Body pale fulvous, oval; head; thorax blackish before and on 

 each side : lateral margin white : scutel each side at base with a 

 small black spot : hemelytra white with a small rufous spot : be- 

 neath piceous : lateral margin of the pectus white. 



Length less than one-fifth of an inch . 



This insect is mutilated ; but it is a very distinct species. I 

 obtained it on the Missouri river, when with Major Long - ex- 

 ploring party. 



EDESSA Fab. Lat. 



1. F. CRUCIATA. — Above with a sanguineous cross. 



Inhabits United States. 



Body greenish yellow: antenna; pale rufous: thorax with a 

 sanguineous band on the posterior margin extending upon the 

 lateral obtuse angles; hemelytra, the coriaceous portion, with 

 the inner and posterior margins sanguineous, giving the appear- 



