THE GROUND BEETLES. 155 



Tribe XIV. HELLUONINI. 



Antennae rather stout, usually compressed, arising from under 

 a distinct frontal plate, all the joints more or less pubescent, first 

 joint stout, equal in length to the next two. Head broadly oval, 

 not narrowed in front of eyes, with a distinct neck; labrum large 

 and prominent, more or less concealing the mandibles; meutum 

 broad, deeply emarginate, usually toothed; terminal joint of palpi 

 elongate-oval or fusiform and obtuse at tip. Thorax more or less 

 cordate, sides and hind angles each with a distinct bristle-bearing 

 puncture. Elytra oblong, truncate at apex, base not margined, 

 sides narrowly inflexed, disk striate or sulcate without dorsal punc- 

 tures. Tibia? compressed and finely bicarinate on the outer edge. 

 Tarsal claws simple. The tribe is represented in the United States 

 fauna by but one genus. 



LIII. HELLUOMORPHA Lap. 1840. (Gr.. " slender + form.") 



Reddish-brown, strongly punctured, hairy beetles of medium 

 size, having the antenna 1 joints broadly compressed; elytra shorter 

 than abdomen, more or less costate instead of striate, broadly 

 rounded at tip. For synoptic table see 



LeConte.~In Bull. Brook. Ent. Soc., II, 1879, 60. 



Six species are known from the United States, two of which 

 have been taken in Indiana, while two others may occur. 



KEY TO INDIANA SPECIES OF HELLUOMORPHA. 



a. Joints of antennae 5-10 square or broader than long. 



I). Thorax longer than wide; elytra more strongly costate; abdomen 

 dark; elytral intervals with three rows of punctures. PR^USTA. 

 bb. Thorax as wide as long ; elytra less strongly costate. 



c. Elytra and abdomen usually darker than thorax ; elytral intervals 

 with three confused rows of punctures. 276. BICOLOR. 



cc. Uniform reddish-brown ; elytral intervals with two rows of punc- 

 tures. 277. TEXANA. 

 (ia. Joints of antennae 5-10 oblong; uniform reddish-brown; intervals with 

 three irregular rows of punctures. FERRUGINEA. 



H. prce-usta Dej., 14 mm. in length, has been taken near Cincin- 

 nati and perhaps occurs in the extreme south of Indiana. 



276 (959). HELLUOMORPHA BICOLOR Harr., New Eng. Farmer, VII, 1820, 



117. 



Elongate, rather slender. Head, thorax and legs reddish-brown, elytra 

 darker. Thorax as wide as long, subcordate, narrower behind ; sides broadly 



