408 TABANID^ 



side but black dorsally, wliile tbe front tibiae have a slight black fringe behind 

 their basal half, and the middle tibiae a rather more extended but indistinct 

 similar fringe and a slight pale fringe beneath besides some scattered pale 

 hairs, and the hind tibiae a more conspicuous longer dense mainly pale antero- 

 dorsal fringe and a finer shorter all pale postero-ventral one ; front tibiae 

 about the tip and the front tarsi with very few "touch-hairs." Pulvilli 

 brownish orange. 



Wings greyish hyaline ; basal veins yellowish brown ; the narrow brownish 

 stigma formed by the swollen end of the subcostal vein. Squamae glassy 

 whitish or yellowish, with a brown margin, and with a short whitish or 

 yellowish fringe which grows into the usual long tuft about the angle. 

 Halteres dull brown. 



? . Almost like the male. Head not much smaller than that of the male ; 

 frontal stripe pale brownish yellow, rather narrowed downwards, and quite 

 four times as long as its broadest part ; lower callus shining black, nearly 

 quadrate unless the margins near be rubbed, possibly higher than broad and 

 not absolutely extending to the eyemargins, and connected by a short black 

 middle line with the small middle callus ; middle callus varying in shape and 

 size, sometimes occupying about one-third the width of the frontal stripe and 

 then only slightly higher than broad or sometimes long and narrow and then 

 occupying only about one-fifth the width of the frontal stripe ; vertical space 

 only very faintly darkened ; upper half of the frontal stripe (down to about 

 the middle of the middle callus) bearing short mixed black and yellow hairs, 

 of which certainly the black hairs are of a rather bristly nature ; frontal 

 triangle covered with yellowish grey dust, which is easily rubbed off so as to 

 cause shining black lunules just above the antennal sockets ; face yellowish 

 dusted, slightly darker on the upper part of the side-cheeks and clothed on 

 them with not very conspicuous whitish yellow or yellow pubescence (in 

 which there are no black hairs), while similar but longer pubescence occurs all 

 about the mouth ; jowls moderately broad, greyish yellow, and with a bare 

 greyish white postocular rim extending from them uj:) to the top corners of 

 the eyes, and this rim absolutely equal in width for its whole length and when 

 seen from above narrowly visible on the upper part for about as much as one- 

 seventh the width of the vertex ; immediately behind this jiostocular rim 

 a short greyish yellow ciliation exists which slightly increases in width 

 from the lower to the upper part, but so slightly that it is not visible when the 

 head is viewed from in front, though this is partly due to the pubescence 

 sloping backwards rather than upAvards, and sometimes three or four small 

 black bristles may occur in this ciliation at about half-way up the head ; 

 vertex with no obviously longer hairs. Palpi dull pale orange ; second joint 

 fairly stout for about the basal half and thence steadily contracting to a sharp 

 point, about three times as long as its stoutest part, and clothed with 

 numerous short depressed black bristles all over the upjier and outer 

 parts except about the base, and with a few thin pale hairs beneath 

 the basal half, though sometimes the little black bristles are distinctly dense 

 and then extend almost to the base, and in such cases the short basal joint may 

 bear a few black hairs though ordinarily it is pale orange with long 

 abundant pale yellow pubescence. Eyes paler or darker green with reddish 

 reflections, and with one purple band just above the middle which slopes 

 upwards from the lowest level of the lower frontal callus ; bare or 

 microscopically and sparsely pubescent and rather higher than long 

 (being higher in proportion and less evenly rounded on the front lower 

 quarter than in T. maculicornis), and the blunt angle between the inner and 

 lower margins being about 135° the eyes extend rather far down. Antennte 

 more or less reddish orange with the style-like portion and the black bristled 

 tip of the basal joint blackish, but usually the large basal segment of 

 the third joint is brownish red, and the two basal joints still darker; 

 basal joint drawn out cap-like over the second joint, and with dense short 

 black bristles on that cap, while usually there are short jjale hairs on the rest 

 of the basal joint though sometimes many of the hairs on the upper side are 

 black ; second joint with a circlet of short black bristles and a few short jmle 

 bristly hairs beneath ; third joint (without the style-like portion) about one 



