362 



14 (15) 3 rd abdominal segment striated to near the apex, basai half 

 of 4 th striated, apical fourth of antennse fuscous, tbe 

 scape black congoensis. 



15(14) 3 rd abdominal segment smooth, as is also the 4 th ; apical 

 half of antennae fuscous, the scape mostly yellow. 



Kolleri. 



1(3(13) Prothorax entirely yellow, basai half of 2"' 1 abdominal 

 segment smooth, its keel not dilated triangularly at 

 the base dimaensis. 



17(12) Head, pro- and mesotliorax red; metathorax red, middle 

 legs red, the hair on the ovipositor not longer on the 

 apex than on the middle ; l st abdominal segment marked 

 with rufous in the centre. • 



18 (19) Eye-orbits narrowly and oral région and malar space yellow. 



tinctimaculatus. 



19 (18) Eye-orbits, oral région and malar space black. Stanleyi. 



Iphiaulax rufo-lineatus sp. n. •— Rufo-testaceous, the 

 abdomen of a deeper rufous tint than the thorax, antennae, almost 

 the apical half of the mandibles, the front, the mark rounded 

 below, the vertex to the end of the eyes, the mark slightly dilated 

 in the middle, 3 marks on the apex of the 2" d abdominal segment, 

 the latéral wider and longer than the central and rounded at the 

 base, the central wider than long, of equal width, transverse, and 

 the 3 rd and following segments black; the 3 rd with the furrow, 

 an irregular mark on the sides at the base, a line down the middle 

 of the 3 rd and 4" 1 rufo-testaceous, the basai 4 ventral segments 

 cream-white; an irregular black line down the middle of the l st 

 and 2 nd and a small spot on the side of the apex of the 2 ud ; the 

 hypopygium black, a triangular yellow mark at the hase. Sheath of 

 ovipositor almost bare. Wings yellowish hyaline; a fuscous cloud 

 extends from shortly behind the*transvu'se médian nervure and 

 posterior part of the transverse basai to the parastigma, another 

 runs from near the base of the radius to the apex, but having an 

 irregular cloud, commencing shortly beyond the apex of the 

 stigma, running across the 2 ld ti'ansverse cubital, more broadly on 

 the outer than on the inner side, and extending almost the length 

 of the transverse cubital into t'he discoidal ; its inner side is dilated 

 at the radius and cubitus, the outer rounded; the hind wings 

 smoky, the basai half entirely in front, the base and an oblique 

 pyriform cloud near the middle, extending on to the cubitus, but 

 not to the hinder part of the wings and a pyriform cloud in front 

 commencing near the base of the radius and extending more than 



