370 



Dr. Malcolm Cameron on 



Palaminus Er. 



1. Size larger (3-4 mm.); antemiae longer, 

 the 4th to the 6th joints fully three 

 times longer than broad; elytra 

 longer . . . . . • (18) hrijanti Cam. 



— Size smaller (2-75 mm.); antennae 



shorter, the 4th to the 6th joints not 

 more than twice as long as broad; 

 elytra shorter (18) parvus Cam. 



Paederus F. 



1. Blue-black, thorax and first four abdomi- 

 nal segments red ; antennae, palpi and 

 legs (including the coxae) black . tamulus Er. 



Astenus Steph. 



1. Species reddish-testaceous, each elytron 



with an oblong black spot in the 

 middle; base of the 6th abdominal 

 segment black . . gracikvt us ¥siuv. {gracilis 'Kr.) 



— Species darker, elytra immaculate; 6th 



abdominal segment concolorous. 2. 



2. Sides of thorax and elytra with strong 



setae; elytra with moderately large 

 superficial puncturation ; abdomen 

 finely punctured .... {19) orientalis C&m. 



— Sides of thorax and elytra with weak 



setae ; elytra with large deep punctura- 

 tion; abdomen at the bases of the 

 segments rather coarsely and deeply 

 punctured ..... (19a) castaneus Cam. 



Stilicopsis Sachse. 



1. Sides of the elytra with 3 or 4 long and 



strong setae; disc of thorax without 



median longitudinal impression. 2. 



— Sides of the elytra without long setae; 



disc of the thorax with median 



longitudinal impression . . . {21) persimil is Cum. 



2. Antennae shorter, the 9th and 10th 



joints distinctly transverse; thorax 

 broader, species smaller. (J : 7 th 

 ventral segment with a deep acutely 

 triangular excision ; 6th with a broad 



