254 NOTES ON" AUSTRALIAN TABANIDAE, ii., 



are in the length of the palpi, in the frontal callus, in the width of the fore- 

 head, and in the costal cell of the wings. 



It might be noted that the type of T. neopalpalis is much abraded, the 

 abdomen and thorax being practically destitute of clothing. The present species 

 is either one of a group of closely related species or else a form of a very variable 

 species, which would include T. neopalpalis, T. pseudopalpaUs, the following 

 species and possibly even T. nemotuberculatus. Until long series are available 

 it seems better to maintain these forms as distinct species and, in giving names 

 to this and the following, we are doing so with the knowledge that in the future 

 it is quite possible that our names will be relegated to synonjTny. 



Tabanus psbudocallosus, n.sp. (Text-fig. 3). 



Closely allied to T. nemotuberculatus and to T. neopalpalis. 



$. Face and cheeks honey yellow, clothed with similar coloured tomentum 

 and with a few scattered brown hairs; beard scanty, yellowish. Palpi coloured 

 as face, second joint slender, ending in a long point, first joint with long grey 

 and brown hairs beneath, second joint with mostly black hairs. Antennae (Text- 

 fig. 3) reddish-yellow, first and second joints concolourous with face and clothed 

 with black hairs; first segment greatly wider than second. Third segment 

 moderate, broad at base, obtusely angulate without any tooth, annuli short. Fore- 

 head broader than in T. nemotuherculaitus, slightly narrowed to vertex, rather 

 darker than face, densely clothed with ochreous tomentum and with black hairs ; 

 callus small pyriform with short extension inconspicuous, of a chamois colour, 

 not much contrasted with general colouration of forehead, resting on subcallus 

 which is bare in middle and similarly coloured. Eyes bare. 



Thorax dark brown, densely clothed with yellow tomentum with scattered 

 golden decumtent pubescence and semi-erect black hairs. Sides with hair-tufts 

 brown above, lighter creamy yellow below and posteriorly. Scutellum similar 

 to dorsum. 



Abdomen tawny, clothed with black i^ubescence with a few scattered golden 

 hairs on mid-line and on segmentations. Venter similar but with fine creamy 

 decumbent pubescence. 



Legs yellowish, tarsi somewhat infuscate, clothed with yellowish pubescence, 

 black on tibiae. Wings brownish yellow along fore-border, otherwise hyaline. 

 Stigma light brown elongate inconspicuous. Appendix present. 



Dimensions: Long, 10.5 mm. ; wing, 9 mm.; width of head, 4 mm.; width of 

 frons at widest part, 0.60 mm. 



Allied to T. nemotuherculatiis, but differs in wider front with small though 

 inconspicuous callus, more slender palpi, third antennal joint with less pro- 

 nouneefl angiilation and in the abdomen hairs being black, not yellow. 



The present species also shows a decided approach to T. neopalpalis; the 

 forehead is about of equal width and the palpi are similar, it differ-s however in 

 the generally darker colour, in the different callus and in the dark anterior border 

 of the wings. 



Hah. — Northern Territory: Darwin. Type in Coll. Hill; paratypes in Col- 

 lection of Department of Public Health, N.S. Wales. 



Tabanus leucopteeus der Wulp. 



Van der Wulp, Tijdsch. voor Entom., xi., 1868, p. 98. 



This species is found on, or near, the sea coast, but on several occasions 

 it has been taken attacking the occupants of boats several miles from the shore 

 (Melville Island, Northern Territory, October 1916 and 1921). 



