FAMILY X. 



longer and wider; eleventh conical-ovate, as long as ninth and tenth to- 

 gether. Thorax almost as wide as head, sides broadly curved; disk with 

 a median groove, and a fovea each side near base connected by a trans- 

 verse line. Elytra as wide as long; discal lines deep, confined to basal 

 third; hnineri prominent, armed with a tubercle: margin with a sharp edge. 

 Abdomen as wide as elytra, the basal segment with two short carinae. 

 Length 1.2 mm. (Fig. 152, a.) 



Monroe, Lawrence and Clark counties; scarce. April 9-May 8. 

 Taken by sweeping blue-grass; also by sifting. 



Fig. 152. a, Kheiius insculptus; b, Rhexidius canaliculatus; c, Triiniomelba dubia; </, Melba parmlii; e, Euplec- 



tus confluent. (After Brendel and Wickham.) 



XVI. RHEXIDIUS Casey. 1S87. (Gr., "a crack or fissure.") 



Head much wider than long ; thorax with a median groove ; hind 

 coxae contiguous; tarsi with two unequal claws. One species occurs 

 in the State. 



024 (1971). KIIKXIDIUS CANALH ri.ATrs Lee., Bust. Journ. Nat. Hist., VI. 



1X49. 107. 



Elongate-oval, subcouvex. I'ale brownish-yellow, rather densely and 

 finely pubescent. Head one-half wider than long, front transversely im- 

 pressed; vertex elevated, feebly sulcate and with a small round fovea each 

 side close to the eye. the two connected by a curved groove. Antenna? short, 

 stout, not reaching base of thorax, joints one and two subequal, cylindrical, 

 as long as wide; three to eight narrower, rounded, slightly transverse; 

 ninth twice as wide as long; tenth twice as wide as ninth; eleventh wider 

 Ihan 1enth and longer than ninth and tenth together. Thorax widest at 

 middle, sides broadly curved: disk convex, tinely and sparsely punctate, and 

 with an entire median impressed line and a transverse shallow one near 

 base, connecting a fovea on each side. Elytra at base as wide as thorax, 

 disk minutely punctate. Last ventral of male with a shallow transverse 

 impression. Length 1.2 mm. I Fig. 152. 7>.) 



Putnam County; rare. April 17. Sifted from damp vegetal) 1 .! 1 

 debris. 



Ratnccia crlni/a Brend.. brown, very densely pubescent, length 

 1.6 mm., is said to occur in the "Northern States;" Ramrcia arcu- 



