ALEOCIIARIDES. 155 



b 3, Anterior tarsi with four 

 joints, hinder pairs with 

 five. 



Labial palpi slender, first joint as long as the other two 

 together, second rather shorter than third; antennae 

 slender; thorax in general scarcely broader than long; 

 abdomen slender. Tachyusa, Er. 



jB 3. Head scarcely or not at 

 all constricted behind. 



All tarsi with five joints. 



a 3, Ligula cleft at apex only ; 

 first joint of labial palpi as 

 long as second and third 

 together. 



Fourth and fifth joints of antennae not broader than 

 third ; head somewhat prominent; thorax notnuich broader 

 than long, somewhat narrowed behind, narrower than 

 elytra ; Ijasal segments of abdomen transversely impressed 

 in front. Onjusa, Kr. 



b 3o Ligula cleft to about the 

 middle; first joint of labial 

 palpi shorter than second 

 and third together. 



Fourth and fifth joints of antennae broader than third ; 

 head sunk in thorax ; latter large and broad ; pubescence 

 (especially on abdomen) silky. Oxytocia, Mannerh. 



b,2. First four joints of posterior 

 tarsi about equal in length. 



Second joint of labial palpi shorter than first and third ; 



second and third joints of antennae generally equal in 



length ; anterior tarsi with four joints, hinder pairs with 



five. Homalota, Mannerh. 



jB 2. Lio'ula broader at base. 



Second joint of labial palpi about half as long as 

 third, not much shorter than first ; antennae rather short, 

 second joint not much longer than third ; thorax not much 

 broader than long, slightly narrowed behind ; abdomen 

 very slender, parallel-sided ; legs short, all tarsi with five 

 joints, first joint of posterior pair rather longer than second, 

 shorter than last joint. PhlocoiJora, Er. 



