22 ARKIV FÖR ZOOLOGI. BAND 12. N:0 17. 



Inxwala differs, however, from Paranigrus in the following 

 points: the head is much shorter in proportion to the breadth; 

 the lower margin of the eyes is sinuated; the front is somewhat 

 differently shaped and the clypeus is narrower; the antennal 

 arista is much longer; the mesonot um has only one keel, the 

 position of the other two being indicated by whitish stripes; 

 in the tegmina no other veins than the inner claval (axillar) 

 vein are granulated, and the fifth anteapical cell is much 

 shorter so that the f ourth and sixth anteapical cells are in contact 

 with each other beyond the apex of the fifth. I think, there- 

 fore, that Paranigrus should be separated from Inxwala, 

 although it is possible that intermediate forms might be found 

 in the future. 



Subfam. Ricaniinae. 

 Syndetica nov. gen. 



Caput pronoto latius, ocuHs latera hujus fere omnino 

 amplectentibus, tegulas tegminum subattingentibus, vertice 

 modice declivi, longitudine sua laterali plus quam triplo 

 latiore, medio quam lateribus breviore, marginibus omnibus 

 et medio carinato, margine apicaU levissime subangulato- 

 rotundato, margine basali late arcuato-sinuato, fronte sat 

 fortiter reclinata, e latere visa cum vertice angulum subrectum 

 forman te, i)aullo latiore quam longiore, lateribus per spatium 

 sat longum parallela, basin versus leviter, clypeum versus 

 sat fortiter angustata, carinis tribus subpercurrentibus sed 

 humilhmis et sat obsoletis instructa, carinis lateralibus aequa- 

 liter curvatis, clypeo fronte dimidio breviore, subaeque longo 

 ac lato, medio et lateribus carinato, rostro coxas medias 

 paullum superante. Pronotum medio capite vix duplo longius 

 et ibidem carinatum, margine apicali late rotundato, margine 

 basali angulato-sinuato. Mesonotum pronoto quadruplo lon- 

 gius, tricarinatum, carina media tenuissima, carinis laterahbus 

 magis elevatis, bifurcis, ramo earum interiore apicem carinae 

 niediae attingente. Tegmina (fig. 3) circiter dimidio an- 

 gustiora quam longiora, apicem versus haud dilatata, mar- 

 gine apicaU aequaliter rotundato, membrana costae apicem 

 versus sensim dilatata, a basi ultra medium quam area costali an- 

 gustiore, quadrante apicali quam hac area latiore, area costali 



