xi Bevision of the Geiius Synthocus. 107 



with the funicle submonihform, 'not, or scarcely, dilated towards 

 the apex, the club thus appearing proportionately larger. 



I can find no reliable characters whereby Ixodicus can be dif- 

 ferentiated from Stephens' genus. 



The species of Brotheus are fairly homogeneous in appearance, 

 if we exclude the two new species, hinodosus and prcEcisicoUis, 

 which differ in their more elongate elytra, with regular rows of 

 small rounded tubercles, and the proportionately greater breadth 

 of the prothorax. The remaining species are smaller insects with 

 quadrate or transverse elytra, usually with a single dorsal carina or 

 row of tubercles on each elytron. Many of the black species appear 

 as if they were devoid of scaling, but they are really covered with 

 minute black scales which more or less conceal the punctuation. 



The genus is probably confined entirely to the South-Western 

 parts of Gape Colony, but in all the examples I have seen there are 

 only two species which are labelled with their exact localities. 



It must be noted that B. pusio, Wied. (p. Ill) is not included in 

 the following Key, because several of the diagnostic characters here 

 utilised are not mentioned in Wiedemann's description. 



Specierum Conspectus. 



1. (4) Mesosternum non tuberculatum; elytra longiora, oblongo-ovata, ad 



humeros prothorace paulum latiora. — Coxss mediae contiguae. 



2. ( 3 ) Caput, prothorax, elytra setis brevibus crassis nigris adspersa ; prothorax 



non nigro-maculata, antice valde declivis, versus basin evidenter 

 angustata, in medio gibbere postico obsolete bituberculata ; elytra 

 humeris rotundatis, ad basin non plane tuberculata. 



2. B. prcecisicollis, sp. nov. 



3.(2) Caput, prothorax, elytra omnino non setosa ; prothorax maculis parvis 



nigris opacis ornata, antice minus declivis, versus basin vix augustata, 



in dorso postico non tuberculata ; elytra humeris obliquis, ad basin 



ipsum tuberculis duobus sat prominentibus, antice directis, prgedita. 



1. jB. hinodosus, sp. nov. 



4. ( 1 ) Mesosternum tuberculo medio instructum ; elytra breviora, subquadrata 



aut transversa ad humeros prothorace multo latiora. 



5. (14) Cox96 medise contiguge. 



6. (11) Elytra ad basin subtruncata, nee tuberculis projectis armata. 



7. ( 8 ) Prothorax ad latera rugosa ; elytra humeris paulum lateraliter extensis. — 



Prothorax latior quam longior 6. .B. crenelatus, sp. nov. 



8. ( 7 ) Prothorax ad latera levis, vix punctata ; elytra humeris non extensis. 



9. (10) Elytra in singulo tuberculis duobus parvis in medio disci, humeris magis 



obtusis, lateribus subparallelis, supra punctis magnis reticulatis sespe 



transversis obsita 7. jB. planus, Thb. 



10. ( 9 ) Elytra in singulo tuberculo uno tantum inconspicuo aut obsoleto in medio 

 disci, humeris magis acutis, lateribus postice gradatim angustatis, 

 supra punctis minoribus nee transversis nee reticulatis obsita. 

 '* 8. B. sordidus, Pasc. 



