384 Annals of the South African Museum. 



terebra and its black spicula ; basal half of the first segment glabrous, 

 its apical but little explanate and spiracles before its centre. Legs 

 elongate and dull ; front tibiae inflated ; hind tarsi apically rufescent. 

 Wings ample with base and apices of both pairs, and in the front ones 

 a central fascia from the antefurcal lower basal nervure to below the 

 narrow and black stigma, nigrescent with cyaneous reflection ; areolet 

 triangular, entire and not large, laterally subcoalescent above, emitting 

 recurrent from its centre. Length 24, terebra 7, mm. The trans- 

 striation of both head and thorax, and shape of the areolet are dis- 

 similar from Xylophrurus, Forst., to which this genus has been con- 

 sidered closely allied. The alar infumescence is well delimitated and 

 very distinctive, relating the present species to the West African 

 G. ruficoxis, Kriech. 



The type was captured during 1912 by Dr. C. A. Wiggins at Entebbe 

 in Uganda, on the northern shore of the Victoria Nyanza, aud presented 

 to the author by Ernest A. Elliott, F.Z.S. 



XYLONOMUS, Grav. 

 Ichn. Europ. iii, 1829, p. 819. 



XYLONOMUS UNIFASCIATUS, sp. nov. 



$ only. A handsome red and black species with white markings, and 

 the basal nervure alone iufumate throughout. Head dull, globose and 

 red with coarse puncturation ; a small mark at centre of the external 

 orbits, and the facial orbits broadly, white ; face convex, rugose and 

 centrally, like the mandibles, black ; f rons centrally carinate and, 

 between the scrobes, stoutly cornute. Antennae stout and filiform, 

 not extending to thoracic apex, black with a central Avhite band ; the 

 apical joint elongate and strongly geniculate, with the penultimate 

 apically spiuate. Thorax deplanate, bright red and coarsely punctate, 

 with pronot/um and tegulae nigrescent ; metathorax scabriculous and 

 centrally bicarinate to the short petiolar area. Scutellum and post- 

 scutellum deplauate, red and coarsely punctate. Abdomen dull and 

 black with the entire apices of fourth to seventh segments, and two 

 subapical marks on the second, clear white ; first segment sessile, con- 

 vex and closely punctate throughout ; second and third transimpressed 

 before their apices ; the third also triangularly impressed discally, with 

 its apical margin emarginate ; hypopygium remote from base of the 

 white-banded terebral valvulae, which are longer than the abdomen. 

 Legs very short, black with the hind tibiae rufescent ; the subintu- 

 mescent and basally constricted anterior tibiae, and their femora partly 



