'U6 KAMIIA' X. I'SJOLAIMIIU.K. 



Ji. Three basal fove:e of thorax connected by a curved 

 groove ; elytra each with a deep subhumeriil groove. 



XL Kybaxis. 

 Jilt. Basal foveie 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. 

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

 two segments sculptured. XII. Bryaxis. 



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

 large pubescent fovea each side of base and a small 

 round median one. XIII. Reichenbachia. 



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

 tex with two foveae ; body glabrous. Eupsenius. 

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

 at base. Anchylarthron. 

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

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

 cylindrical, narrow. XIV. Batrisoues. 



X. Decarthron BixMid. 1865. (Gr., "ten + joint.") 



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

 ing; antenna; 10-jointed, tlie joints, aside from those in club, 

 rounded; thorax subglol)ose and with a single funnel-shaped fovea 

 near the middle of the l)ase ; elytra In-oad, each with two basal 

 fovefB, the humeri prominent; abdomen short and wide, the basal 

 dorsal segment with two distant i^arallel carinje. One species has 

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



KEY to INDIANA SPECIES OF DECARTHRON. 



a. Form of body broad, robust. 

 h. Pubescence long, erect. 



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

 pressed front by faint converging grooves; length 1.4 mm. 



ABNORME. 



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



front by straight i)arallel grooves; length l.G mm. exsectum. 



hh. Pubescence short; occipital foveaj deep, well separated, not connected 



with the concave front ; length 1.4 mm. G02. brendeli. 



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



length 1.5 mm. longuluw. 



GOl' (9373). Decarthron brendeli Casey, Bull. Cal. Acad. Sci., II, 1S87, 

 464. 

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

 tenuoe 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 



