316 FAMILY X. PSELAPHIDJE. 



/(. Three basal foveu? of thorax connected by a curved 

 groove ; elytra each with a deep subhumeral groove. 



XI. RYBAXIS. 



/;/;. Basal fovea? of thorax not connected by a groove; ely- 

 tra without a subhumeral groove. 



i. Elytra with margins and sloping sides nearly parallel ; 

 male with three of the dorsal segments sculptured. 



BRACHYGLUTA. 



ii. Elytra with sides diverging; male with not more than 

 two segments sculptured. XII. BRYAXIS. 



yy. Elytra each with three small basal foveae; thorax with a 

 large pubescent fovea each side of base and a small 

 round median one. XIII. REICHENBACHIA. 



ff. Antenna? very short, with only the last joint enlarged; ver- 

 tex with two fovese; body glabrous. EUPSENIUS. 

 cc. Body convex ; margin of abdomen narrow ; thorax with one fovea 

 at base. ANCHYLARTHRON. 

 bb. Abdomen not margined ; tarsi with two unequal claws ; thorax with 

 two or three longitudinal grooves; body elongate, more or less 

 cylindrical, narrow. XIV. BATRISODES. 



X. DECARTHRON Brend. 1865. (Gr., "ten + joint.") 



Head with disk of vertex longer than wide, the front fovea want- 

 ing; antennae 10-jointed, the joints, aside from those in club. 

 rounded ; thorax subglobose and .with a single funnel-shaped fovea 

 near the middle of the base; elytra broad, each with two basal 

 f ovea?, the humeri prominent ; abdomen short and wide, the basal 

 dorsal segment with two distant parallel carinae. One species has 

 been taken in the State, while three others may occur. 



KEY TO INDIANA SPECIES OF DECARTHKON. 



a. Form of body broad, robust. 

 Z>. Pubescence long, erect. 



c. Color black ; fove;e of vertex large and connected with the de- 

 pressed front by faint converging grooves; length 1.4 mm. 



ABNORME. 



cc. Color dark red ; fovea? of vertex small, connected with the convex 



front by straight parallel grooves ; length 1.6 mm. EXSECTUM. 



bb. Pubescence short ; occipital fovea? deep, well separated, not connected 



with the concave front ; length 1.4 mm. 002. BRENDELI. 



aa. Form slender, elongate ; thorax not punctate ; color pale reddish-brown ; 



length 1.5 mm. LONGULUM. 



602 (9373). DECAKTHRON BRENDELI Casey, Bull. Cal. Acad. Sci., II, 1887, 



464. 



Piceous-brown ; elytra dull red; antenna? and legs paler brown. An- 

 tenna? scarcely as long as head and thorax, eighth and ninth joints trans- 

 versely oval, tenth one-half longer than wide and three times as thick as 



