496 Mr. Gilbert J. Arrow on Characters and Relationships 



Fliacochrous dissimilis, sp. n. 



Piceo-niger, ore pedibiis, protlioracis et elytroruin niarginibusque 

 brunnescentibiis, abdomine ferrugineo ; capite crebre punctato, pro- 

 thorace nitido modice punctato, lateribus grosse et crebre punctatis, 

 elytris crebre punctatis, seriebus tribus longitudinalibus regulariter 

 quadristriato-punctatis, interstitiis crebre confuse punctatis : 



(J, multo major, mandibulis modice prominentibus, rotundatis, 

 capite subnitido, prothoracis lateribus latissimis, confluenter punc- 

 tatis, elytris opaeis, parte antica angusta nitida ; lateribus cum 

 pedibus longe rufo-hirtis, tibiarum anticaruin dente supero minuto : 



5 , sat nitida, capite rugoso, tibiis anticis fortiter 3-dentatis et 

 serratis. 



Long. 13-lG mm. Lat. max. 7-5-8'5 mm. 



Hah. Tenasserim, Moulmein (Z. Fca, May 1887). 



In the British and Genoa Museums, and M. Rene 

 Oberthiir' s collection. 



This is the largest species of Phaeochrous I have seen, 

 and the disparity between the sexes, always considerable 

 in this genus, is very remarkable. The anterior half of 

 the upper surface of the male is shining, and the posterior 

 half {i. c. the whole of the elytra except a narrow anterior 

 strip) entirely dull and sooty. The female is shining above 

 and beneath, except upon the head, which is rugose. The 

 elytra (in both sexes) are finely and densely punctured, and 

 each has three longitudinal bands composed of four straight 

 lines of punctures. The colour is rather dark with the 

 abdomen reddish. 



The claws of the male are blunt, with the basal append- 

 age inconspicuous and the tooth of the outer claw reaching 

 beyond the middle. 



A similar sexual difference in the elytra is found in a 

 West African species, Phaeochrous dtsjmr, Qued. 



Phaeochroiis pallidiis, sp. n. 



Laete feiTugineu?, sat parvus, prothorace distincte baud dense 

 punctato, elytris fortiter et aec[ualiter crebre striato-punctatis, baud 

 costatis : 



(J , mandibulis latis, prominentissimis, capite nitido, modice punc- 

 tato, tibiis anticis latis, tridentatis, dente tertio minuto, margine 

 supra leviter crenulato, liaud distincte serrato : 



$ , capite fortiter rugose punctato, elytrorum interstitiia minute 

 sat parce punctulatis. 



Loni;. 9-10 mm. Lat. max. 4-5 mm. 



