'I' II 10 LEAF BEETLES. 11 07 



I'll.",!) (ll),:;::<;>. l>o.\.\riA I;IK.\ Say, Journ. 1'liil. A-;ul. Nat. Sci., V, 1827, 

 283; ibid. II, :',:',!). 



Elongate, convex, subcylindrical. Dark reddish-brown, sinning; an- 

 tenna 1 and legs reddish-yellow. Third joint of antenuje one-half longer 

 than second. Thorax one-third longer than wide, broadest near apex; 

 tubercles on sides not prominent, median line very distinct; surface con- 

 vex, shining, marked with minute scattered punctures. Elytra with two 

 shallow impressions near middle; intervals nearly flat, almost smooth. 

 Length 7-7.5 mm. 



Throughout the Stale; rather scarce. April 21-Oetober 18. 

 Occurs on leaves and about roots of sknnl: cabbage. The more con- 

 vex, shining and sparsely punctured thorax, wider in front, and the 

 smoother intervals of elytra readily distinguish this from flai'ipcs. 



II. I-LEMONIA Lat. 1829. (A geographical name.) 



This genus is represented by a single species resembling Donacia 

 in form, but distinguished by the narrow tarsi and the distinct spine 

 at outer angle of tips of elytra, 



1'040 (6549). ELEMONIA NIGRICOKNIS Kirby, Faun. Bor. Amer., IV, 1837, 



222. 



Elongate, slender, subconvex. Thorax, elytra and legs brownish-yel- 

 low ; head, antenna', tarsi and under surface black. Thorax subquadrate, 

 constricted at middle, front angles rounded, prominent; surface smooth, 

 with a few coarse punctures at base. Elytra each with ten long rows of 

 punctures and a shorter sutural row; alternate intervals wider and sub- 

 convex. Length 5.5-8 mm, 



Lake County; scarce. May 20-May 28. Taken from pond- 

 weed (Poiamogeton} in the Calumet River near Pine; also in the 

 wash up of Lake Michigan. Probably occurs in lakes and streams 

 throughout the northern half of State. 



Tribe II. SAGRINI. 



Small or medium-sized, oblong or elongate, roughly punctured 

 species having the head prominent, not narrowed behind; eyes very 

 convex, entire; antennas filiform, rather widely separated at base; 

 thorax not wider than head. Elytra entire, wider than thorax, 

 strongly and irregularly punctured; front coxa- conical, transverse, 

 usually prominent and contiguous; middle and hind coxa? narrowly 

 separated; tarsal claws (in our species) toothed or cleft, 



The principal paper treating of the genera comprising both this 

 tribe and tribe IV, Clytkrin-i, is by 



Horn. ''Studies in Chysomelida-," in Trans. Amer. Ent. Soc., 

 XIX, 1892, 1-18. 



Three of the four known genera are represented in the State. 



