new Species of 'Tah&ni. 319 



however, by the side stripes composed of spots contiguous to 

 each other, and tlms forming a distinct stripe, whereas in 

 Tahanus secedens the side s]iots are isolated and the whole 

 abdomen is of a reddish-brown shade, any gradations in 

 colour merging in each other, not forming well-marked dark 

 stripes as in the T. tceniola group. It is distinguished from 

 T. tceniola by the heavily striped thorax, similar to that of 

 T. gahonensis &c., and by the wings tinged with brown, 

 shaded on most of the veins. 



Length 1.3-16 mm. 



Face covered with greyish tomentum, which becomes 

 yellowish brown above the antenns, and with short white 

 pubescence ; beard whitish. Palpi pale yellow, with white 

 pubescence at base and short black pubescence elsewhere, not 

 very stout at base, ending in a broad point. Antennae 

 reddish ; the first joint rather smaller than is usual, with 

 black pubescence; the second small, with black pubescence ; 

 the third long, with small tooth near the base, becoming 

 brownish red after the base ; and the last four divisions wholly 

 blackish. Forehead covered with yellowish-brown tomentum, 

 nearly six times as long as it is broad, narrowing slightly 

 anteriorly ; the frontal callus dark brown, oblong, furrowed 

 in the middle, almost or entirely reaching the eyes, with a 

 long thick line proceeding from it. Thorax blackish, the 

 two broad stripes composed of grey tomentum, covered with 

 yellow pubescence ; sides greyish, with some yellow pubes- 

 cence, which is continued round base of thorax, elsewhere it 

 is black ; breast and sides covered with grey tomentum and 

 some white pubescence. Scutellum blackish, covered with 

 greyish tomentum except in the centre. Abdomen reddish 

 brown, blackish on the last three segments, with a distinct 

 grey, tomentose, median, continuous stripe, continued to the 

 sixth segment, bordered by dark brown or blackish stripes, 

 to which are contiguous the yellowish side spots, forming 

 a fairly distinct stripe as far as the fourth segment ; the 

 pubescence on median stripe and on the side spots is chiefly 

 yellowish, elsewhere black ; underside yellowish, with broad 

 black median stripe, covered with white pubescence. Legs 

 blackish; tibiiu yellowish, black at apex; middle and poste- 

 rior femora often largely yellowish red, femora with grey 

 tomentum and white pubescence; the tibia; with whitish 

 pubescence, elsewhere it is black. AVings hyaline, tinged 

 with brown, most intense on the fore border ; stigma reddish 

 brown, veins brown. 



