224 



Natural History Bullktin. 



Z"' Maxillary palpi without appendages. 



Antennse moniliform maxillary palpi minute, the basal joints 

 hidden, the last two connate, together forming a globular 

 club. - - . . - - Chennium, I,atr. 



Last three joints of antennie forming a club Last joint of maxil- 

 lary palpi elongate with a terminal seta. - Tyrus, Aube. 

 Last joint of antennae enormously enlarged, last joint of maxillary 

 palpi cylindroid, rounded at tip. - - Hamotus, Aube. 



a^ Tarsi with a single claw, posterior cox:e distant. 



Maxillary palpi excessively long, third joint small, globular, second 

 and fourth pedunculate-clavate, very long. 



PsELAPHus, Hbst. 

 Maxillarv palpi with the second joint tuberculate-clavate, the third 

 quadrate, fourth broadly securiform. 



PsELAPTRicHus, Brcndel. 



Maxillary palpi with the second joint clavate, pedunculate, the 



third triangular, the fourth long, securiform. Tychus, Z,e«cA. 



rt3 Posterior coxce approximate. Tarsi with a single claw. Body linear 



depressed. - - Rhixoscepsis, Lee. 



II, Antennse distant, inserted on the sides of the head, beneath short, distant, 



not porrected tubercles. 

 a^ Posterior coxai distant, only one claw fully developed. 

 (&i Body broad transversely cylindrical in cross section. Abdomen more or 



less broadly margined. 

 c^ Abdominal margin retuse, narrow, dorsal segments unequal. Two basal 



ventrals longer, elytra narrow-shouldered very long, vertex bifoveate. 



{^Bythinini.) 

 rfi Last palpal joint cultriform antennal club three-jointed. First antennal 



joint very long, vertex differently sculptured in the sexes. 



^L\CH.ERODES, Brendel. 



</2 Last palpal joint acuminate-ovate. 



Penultimate joint of antennie small, lenticular, the last ovate. 



EUTRICHITES, Lec. 



Penultimate joint of antenna; larger trapezoidal, the last long 

 fusiform. .... Scalenarthrus, Lec. 



c* Abdominal margin broadly retuse the basal segments of the dorsum and 

 venter much longer, tarsi with a single claw. Elytra flat, last palpal 

 joint fusiform. {Bryaxini). 



Vertex bifoveate, prothorax with lateral edge rounded, unifoveate, 

 antennie ten jointed with a three-jointed club. Body broad, 

 sexual marks on the intermediate thighs, elytral lines and 

 abdominal carinae long, parallel, and distant. 



Decarthron, Brendel. 



