TIMARCHA. 261 



2, Posterior tibiae not toothed at apex. 



A A, Eeflexed margin of elytra strongly fur- 

 rowed ; first ventral segment of abdomen a 

 little longer than second and much shorter than 

 second and third together. 



Antennae short, not one-tliird as long as body, last five 

 joints forming an almost distinct club ; mesosternum very 

 broad and very short ; elytra confusedly punctured. 



Plagiodera, Eedt. 



S jB. Eeflexed margin of elytra even ; first ven- 

 tral segment of abdomen nearly as long as 

 next three together. 



Antennae rather short, not reaching middle of body, last 

 five joints forming an elongate club ; mesosternum very 

 short, broadly sinuate in front ; elytra punctured in rows. 



Phaedon, Latr. 



b. Body elongate, 



I. Tarsal claws toothed at base. 



Antennae a little shorter than half the body, slender at 

 base, gradually thickened at apex ; mesosternum rather 

 broad and long; elytra punctured in rows. 



Phratora, Eedt. 



II, Tarsal claws simple. 



Antennae scarcely reaching beyond base of thorax, last 

 five joints forming a distinct club ; mesosternum as broad 

 as, or broader than prosternum, not excised at base ; head 

 somewhat produced in front, last joint of palpi long. 



Prasocuris, Latr. 



Tifnavcha, 



A, Thorax broadest before middle, much more narrowed 

 behind than before. 



Black, dull ; under-side and legs dark-blue or blue-green. 

 Thorax very closely and finely punctured ; elytra as finely 

 but more scantily punctured. L. 5 — 6 1. Common. 



T. laevigata, Lin. 



jB. Thorax broadest about in middle, not much more nar- 

 rowed behind than before. 



Black, almost lustreless, usually with violet reflection ; 

 legs dark-blue or blue-green. Punctuation of thorax fine 



