400 GERTRUDE RICARDO. DIPTEREN II. 



22. Tabanus lorentsi n. sp. 



Type (female) and another from Alkmaar, (Lorentz). 



A médium sized uniformly reddish yellow species, with narrow hairy palpi, reddish 

 legs, yellow antennae and clear wings. Length 14 m. m. Not unlike Tabanus scrus Wlk., but 

 distinguished by the shape of the palpi and by the broader forehead. 



Face covered with reddish yellow tomentum, and with scanty same coloured pubescence. 

 Palpi reddish yellow, with black pubescence, which is thick, and fringe like on the upper 

 border at base, standing erect, palpi slightly stout at base but suddenly constricted and 

 tapering to a point. Beard same colour as face. Antennae yellowish, the first two joints a 

 paler shade with black pubescence, the third black at apex with a distinct though small 

 tooth. Forehead with greyish tomentum, almost parallel, about six times as long as it is 

 broad anteriorly, the frontal callus pear shaped with a long fine lineal extension, reddish 

 brown, not reaching the eyes. Thorax reddish yellow but appearing paler owing to greyish 

 tomentum, sides with long yellow hairs; breast with grey tomentum and yellow pubescence. 

 Scutellum reddish yellow. Abdomen reddish yellow, short and rather broad with traces of grey 

 tomentum at base, the little pubescence visible on dorsum is black, at sides yellowish; 

 underside reddish yellow, rather blackish brown at apex. Legs uniformly reddish brown, 

 pubescence black, yellowish on underside of fore and middle femora. Wings clear with a faint 

 yellow tinge on fore border, veins yellowish. 



23. Tabanus insurgens Walker. 



Proc. Linn. Soc. V, p. 276 (1861). 



Osten Sacken, Ann. Mus. Civ. Genova, XVI, p. 417 (18S2). 



Type a maie from New Guinea. 



A long séries of females from Rivierkamp, Bivak Island, Alkmaar, Heuvelbivak in Dr. Lorentz's 

 Coll. Osten Sacken identifies two females from Doré Hum and Ramoi, New Guinea, as this 

 species, remarking that the description agrées tolerably well, though the type is a maie. 



A slender reddish yellow species, legs, antennae and palpi the same colour as abdomen. 

 Frontal callus small and narrow. Length maie type 1 1 1 / 2 m. m., females 10 — 12 m. m. 



Ç. Face covered with reddish yellow tomentum. Palpi same colour, slender, almost the 

 same width throughout, with fine black pubescence. Beard same colour. Antennae with reddish 

 yellow hairs on the first two joints, the small tooth of the third joint crowned with a small 

 tuft of the same. Forehead parallel, in some spécimens slightly narrower anteriorly, about six 

 times as long as it is broad anteriorly, frontal callus shining yellow, small, pear shaped or 

 oblong with a fine lineal extension, a few brown hairs at vertex. Thorax reddish yellow with 

 some yellowish tomentum and with appressed yellow pubescence and some longer yellow hairs. 

 Abdomen reddish yellow, narrow, a little black pubescence at apex which is often brownish ; 

 underside with close yellow pubescence. Legs with yellow pubescence. Wings greyish with a 

 yellow tinge, stigma yellow, veins yellowish brown. 



çf identical. Face with some long and short dark hairs on the cheeks, which are 

 hardly noticeable in the female. Palpi yellow with black hairs, clubshaped. Antennae with 



