152 r. W. EDWARDS. 



TJiorax dark greAash-brown ; markings of the usual type but indistinct ; median) 

 stripe perceptible along whole length of scutum ; lateral stripes reaching the incon- 

 spicuous post-sutural spots ; scutellum dark ; sparse yellowish pubescence on- 

 scutum. 



Abdomen blackish-brown, with a slightly reddish tinge towards the base, hind 

 margins of segments grey, with pale pubescence. Venter rather lighter in colour. 



Legs : Front legs dark brown ; tibiae considerably swollen, with a rather narrow 

 and inconspicuous pale ring at the base. Middle legs : femora brown, darker at the 

 tip ; tibiae whitish, except on the apical fourth, which is dark brown ; there is no 

 trace of a dark area dividing the pale part of the tibia into two rings ; metatarsus 

 whitish with, blackish tip ; second to fourth tarsal joints pale at the base. Hind legs 

 similar to the middle pair, but the tibiae have only an indistinct whitish ring at the 

 base and faint traces of another narrower one beyond the middle. Pubescenjce on the 

 mid and hind femora and tibiae mainly pale. 



Fig. 5. Haematopota mordens, EcbA-., sp. n. 



Wings dark greyish, with white markings ; a conspicuous somewhat crescent- 

 shaped white mark close to the tip. Squamae pale. Stem of halteres yellowish, 

 knob darker. 



Length, 6 mm. ; wing-length, 5*5 mm. ; width of head, 1-9 mm. ; mdth of front 

 at vertex (in type specimen), 0*75 mm. 



Northern Territories, Gold Coast: Dimbipe, 19.vii.l910, 1$ (type) ; 

 Fadama, road to Dogankade, 6. vi. 1910, 1 $ ; Salaga, biting boy near constabulary 

 lines, 23. vi. 1910, 1 $ ; Naquair, yam farms, 1-2. viii. 1910, 2 $. All collected and 

 presented by Dr. F. J. A. Beringer. 



The Fadama and Salaga specimens differ from the type in having the front dis- 

 tinctly broader ("45 instead of '39 of the width of the head). The Naquair specimens 

 also have a shghtly broader front than the type, and in these the middle tibiae have 

 the usual two pale rings, being darkened at the base and just beyond the middle ; 

 the rings however are not conspicuous and the pubescence of the tibia, as in the t}^e, 

 is mainly pale ; in addition the Naquair specimens have the pale markings along the 

 hind border of the wing rather less developed. 



H. mordens appears to be most nearly allied to H. vexans, Aust., from which it can 

 be easily distinguished by the shorter first antennal joint, less swollen front tibiae, 

 paler middle tibiae, and different wing-markings, especially towards the apex of the 

 wing. 



