A Monograph of the Formicidae of South Africa. 161 



rectangular lobe, which is longer than deep. First segment of abdo- 

 men campaniform, as long as wide at the apical margin, where it is 

 widest ; 2nd segment a little longer than the 1st, the remaining 

 segments entirely hidden under the 2nd and reflexed underneath it, so 

 that the apex of the abdomen is directed forwards. Deflated. 



Grahamstown (Hewitt), 2 specimens. Type in the Albany Museum, 

 Grahamstown. 



Very closely allied to Traegaordhi, but in the absence of the $ sex, 

 it is not advisable to unite it with that species, from which it differs 

 by the shorter plate of the frontal carinae and by the narrower petiole. 



Amongst some ants recently sent to me for determination by the 

 South African Museum, there was a specimen of a Proceratiine 

 ant mounted on the same card with some Monomorium sp. — ?, and 

 taken at Kimberley by Brother Power. For the reception of this 

 peculiar insect, which combines in itself some of the chai'acters of all 

 the other genera of the tribe, it will be necessary to erect a new genus, 

 as follows. 



Genus PSEUDOSYSPHINCTA, g.n. 



Characters. 



$ . Antennae 12-jointed, the scape strongly incrassate apically, 

 more than half as long as theflagellum ; 1st joint of fiagellum as long 

 as wide, the apical joint very large, acuminate ovate, as long as the 

 rest of the fiagellum, all the other joints at least three times wider 

 than long, 2nd and 3rd joints almost fused. Crypeus produced for<- 

 wards into a horizontal lamella with a convex anterior margin, pro- 

 jecting over the mandibles, which are almost entirely hidden under it, 

 as in Biscothyrea. Eyes present, not very small. Mandibles tri- 

 angular, the masticatory margin concave. Thorax narrowed posteriorly ; 

 seen from above it forms an elongate triangle, the truncate apex of 

 which is at the brow of the declivity. It is not so elongate as in 

 Probolomyrmex, being somewhat intermediate between that and 

 Sysphincta. Promesonotal suture faintly indicated, the meso-epinotal 

 absent. Petiole nodiform, articulating only over its lower half with 

 the 1st abdominal segment. Abdomen as in Discothyrea and Sys- 

 phincta, the apical segments being hidden under the 2nd, and ante- 

 flexed. Middle and hind tibiae with one calcar. 

 Type of genus P. Poweri, described below. 



