262 NOTES ON AUSTRALIAN TABANIDAE, 11., 



Tabanus griseicoloe, n.sp. (Text-figs. 9 and 10.) 



A moderately small grey species allied to T. clavicallosus Rie. but with wider 

 forehead. 



Face and cheeks densely clothed with greyish-yellow tomentum, with sparse 

 whitish hairs; beard white, rather scanty. Palpi yellow, with moderately dense 

 pale pubescence on outside, and with a few short dark hairs near apex; second 

 joint moderately long, rather strongly curved, moderately thick at base. An- 

 tennae (Text-fig. 9) yellow, the third joint, except base, somewhat infuscate, 

 first joint longer but not greatly wider than second, third joint with basal por- 

 tion expanded, obtusely angiilate above but without tooth, annuli short. Fore- 

 head (Text-fig. 10) broad, about three times as long as broad, almost parallel- 

 sided, very slightly narrower at vertex; densely clothed with somewhat more 

 yellowish tomentum than face, with scanty pale pubescence and with erect dark 

 hairs most marked at vertex; callus rather large, transversely oval, not reaching 

 eyes, with a short linear extension. Eyes bare. 



Thorax densely covered with light gTeyish-yellow tomentum with indistinct 

 traces of darker brown longitudinal stripes, with scattered pale pubescence, and 

 semi-erect dark hairs; pleurae similar, with tufts of long white pubescence. 

 Scutellum similar to dorsum. 



Abdomen thickly clothed with similar coloured tomentum to thorax; where 

 denuded, the derm appears black, lighter on the segmentations; rather densely 

 clothed with pale decumbent pubescence. Venter similar. 



Legs with femora dark brown, tibiae yellowish-brown, the apical third of 

 anterior tibiae infuscate. Tarsi infuscate. 



Wings hyaline, costal cell and all the veins lightly suffused with brown; 

 slisTna elongate, rather dark; no appendix present. 



Dimensions : Long, 9.5 — 10 mm. ; wings, 9 mm. ; width of head, 3.5 mm. ; 

 width of frons at widest part, 0.60 mm. 



Hab. — Queensland: Hughenden. (March, 1921, Geo. Brady, Hill, No. 1445). 

 The type and paratype respectively are in the Collection of the Aust. Institute 

 of Tropical Medicine and Dept. of Public Health, N.S.W. 



Described from two specimens. In one the abdomen appears darker and 

 more conspicuously banded; this is apparently due to the clothing being more 

 or less abraded on the basal portion of the segments. The general colour of the 

 insect appears nearest to the dark olive of Ridgeway's standard colours. 



The species is allied to T. clavicallosus, but diffei-s in the somewhat wider 

 forehead with differently shaped callus, and in its general lighter colouration. 



Tabanus clavicallosus Ric. 



Ricardo, Ann. Mag. Nat. Hist., (8), xis., 1917, p. 219.-7. griseiw, Taylor, 

 Froc. Linn. Soc. N.S. Wales, xliv., 1919, p. 55. 



A specimen was compared with the type of T. griseus in the Queensland 

 Museum and afterwards compared with a paratype of T. clavicallosus Ric. No 

 difference could be detected. 



Specimens from Moa or Banks Island in Torres Strait appear to represent 

 a geogi-aphical race if not a distinct species. 



Var. banksiensis, n.var. 



?. Face, palpi, antennae, forehead, frontal callus and thorax as in T. clavi- 

 callosus Ric. Abdomen dark brown with lighter segmentations, the anterior 



