THE ANT-LOVING BEETLES. 317 



eighth, ovate, truncate at base. Thorax finely punctulate, slightly wider 

 than long. Elytra one-half longer than thorax, discal lines parallel. Cari- 

 nie of first dorsal three-fourths the length of the segment, separated by one- 

 half its width. Length 1.4 mm. (Fig. 149. c.) 



Lake and Putnam counties; scarce. ^larch 26-]\ray 25. 



D. ahnorme Lee, and D. exsectnm Brend., both are recorded as 

 occurring in the "Northern States east of the ^[ississippi River," 

 while D. longuluni' is a southern form which may occur in the south- 

 ern counties. 



Bythimis tychoides Brend. (Fig. 149,7).), chocolate-brovTi, an- 

 tenna and legs dark yellow, length 1.2 mm., has been taken at Cin- 

 cinnati, while Nisaxis iomeniosus Aube, reddish-brown, pubescence 

 long and fine, body coarsely punctate, length 1.2 mm., is recorded 

 from southern Illinois. 



XI. EvBAxis Saulcy. 1876. 



In this genus the males ha^'e a strong tooth on the front tibia\ 

 Two species have been taken in the State, ^vhile another may occur. 



KEY TO SPECIES OF KYBAXIS. 



a. Median fovea of base of thorax large, pubescent ; antennse of male very 

 long, the club slender. 603. vaeida. 



aa. Median fovea small, not pubescent. 



&. Carinse on basal dorsal segment of abdomen including but one-fourth 

 of the width of segment between them ; antennal club loose, the 

 next to last joints not elongate or compressed. conjuncta. 



66. Carinse on base of abdomen including one-third of width of segment ; 

 antennal club dilated and compressed in male, densely clothed with 

 black hairs. 604. bkendeli. 



60.3 (1914). Rtbaxis vauda Brend., Bull. Lab. Nat. Hist. Iowa, I, 1S90, 

 273. 



Dark piceous-broA^-n ; elytra and antemia? red ; legs paler. 'Vertex with 

 a deep impression; antennse nearly one-half the length of body, first joint 

 almost as long as third and fourth together; second shorter, oblong, 

 rounded; third to sixth narrower; seventh and eighth narrower and 

 shorter; ninth and tenth suddenly increasing in size, wider than long; 

 eleventh as long as the two preceding together. Thorax deeply impressed 

 each side near base. Length 2.2 mm. 



Posey County; rare. April 16. 



R. conjnnrta Lee, black, elytra red or darker, length 1.8-2 mm., 

 is said to occur "over the territory east of the IMississippi River." 

 604 (1916). Rybaxis bbendeli Horn, Crotch's Check List, 1ST3. 86. 



Black, shining; elytra ranging to piceous-red ; legs, palpi and club of 

 antennffi reddish-brown. Head with two very large fovere between the eyes. 



