158 BRACIIELYTRA — ALEOCHARIDAE. 



J5 H. Third jointofmaxillaiypalpi not thickened. 



Tachyusa. 



II, Head not constricted behind. 



2. Labial palpi with three joints. 



A A. Eirst and second joints of labial palpi 

 about eqvial in breadth. 



(( a. Base of thorax scarcely perceptibly 

 sinuate. Lcptusa. 



h h. Base of thorax distinctly sinuate on each 

 side. Eur y us a. 



H a. Second joint of labial palpi distinctly 

 narrower than first. 



a a. Base of thorax distinctly sinuate on each 

 side. 



A a. All joints of labial palpi nearly equal 

 in length ; legs rather short. 



Microglossa. 



B b. Second joint of labial palpi rather 

 shorter than first and third ; legs short. 



Di^iarda. 



C e. Second joint of labial palpi a little 

 shorter than first, and tliird a little shorter 

 than second ; legs long. Atemcles. 



h b. Base of thorax not sinuate. 



Myrmedonia. 



2, Labial palpi with two joints. Placusa. 



B. Tarsi 5, 5, 5. 



a. Head constricted behind. 



I. First and second joints of labial palpi about equal 

 in breadth. Ocalea. 



II, Second joint of labial palpi distinctly narrower 

 than first. 



1, Legs slender. 



A A, Elytra distinctly sinuate at posterior angles. 

 a a. Elytra coarsely punctured. Ilyohates. 

 b b. Elytra finely punctured. Calodera, 



