CTENIOPUS. 333 



Cteniopus, 



Bright sulphur-yellow ; apex of antennae, palpi and 

 tarsi blackish ; eyes black ; head, thorax and under-side of 

 male sometimes darker. Thorax straight in front, broadest 

 before middle, scarcely narrowed behind, much narrowed 

 in front. L. 3 — 4 1. Common. C. sulphureus, Lin, 



Ofnophliis, 



Black ; base of antennae, part of maxillary palpi and of 

 tibiae varying from brown to red-yellow ; elytra and tarsi 

 red-yellow. Thorax straight in front, sides slightly curved, 

 greatest breadth in or near middle, with a slight central 

 furrow. L. 4 — 4| 1. Not common. 0. armeriae, Curt. 



A, Mandibles prominent. 



Last joint of maxillary palpi hatchet-shaped ; inter- 

 mediate coxae with trocliantina ; last abdominal segment 

 not very short ; body flat ; head not prolonged into a ros- 

 trum. Pytho, Latr. 



J5, Mandibles not reaching beyond labrum. 



Last joint of maxillary palpi not hatchet-shaped ; inter- 

 mediate coxae without trocliantina ; last abdominal seg- 

 ment very short. 



a. Head not prolonged into a rostrum. 



I. Antennae gradually thickened. 



Mandibles finely toothed on inner-side, bifid at apex ; 

 sides of thorax not toothed. Salpingus, 111. 



IT, Antennae ending in a three-jointed club. 



Similar to Salpingus, but with mandibles not toothed on 

 inner-side and sides of thorax often toothed. 



Lissodema, Curt. 

 h. Head prolonged into a rostrum. 



Similar to Salpingus, but witli mandibles not toothed on 

 inner-side. Antennae inserted on rostrum, latter more or 

 less long, flattened, generally sligbtly narrowed in middle, 

 more rarely dilated at apex. Rhinosimus, Latr. 



