BY FRANK H. TAYLOR. 65 



yellowish, frontal callus dark brown, pear-shaped, with a short 



lineal extension, about one-third the width of the front; palpi 

 yellowish, second joint moderately slender, ending in a blunt 

 point, pubescence pale, with a few, scattered, black hairs: first 

 two joints of antennse yellow, pubescence black, base of third 

 reddish-brown, annuli black, tooth represented by an obtuse 

 angle. 



Thorax black, with brown torn en turn, sides faintly reddish, 

 scutellum similar to thorax, pubescence black, pale laterally: 

 pleurae with grey tomentum and pubescence. 



Abdomen brown, first segment darker, with a brown posterior 

 border, segmentations greyish, pubescence black; venter dark- 

 brown, with grey tomentum and pubescence. 



Legs yellowish-brown, tarsi darker, pubescence mostly black. 



Wings clear; veins dark brown; stigma yellow; a short ap- 

 pendix present. 



Hab.— m. Territory : Darwin (G. F. Hill, No.67). 



This species appears to be related to T. spatiosus Ricardo, and 

 to T nigritarsis Taylor, but is readily distinguished from them. 



I have much pleasure in dedicating this species to its discoverer. 



Pa rat ype in Coll Hill. 



Tahanls davidsoni, sp.n. 



9. Length, 15*5; width of head, 5: length of wing, 13 mm. 



Head: face yellowish, black on the upper third, with grey 

 tomentum, pubescence pale: cheeks with dark brown tomentum 

 and black pubescence: subcallus dark brown, with a shallow 

 median groove: front slightly narrower anteriorly, tomentum 

 dark brown, pubescence black, frontal callus about half the width 

 of the front and resting on the subcallus, pear-shaped, with a 

 lineal extension reaching the middle of front, black, lower half 

 of basal portion reddish-brown; beard grey; palpi pale reddish, 

 stout, ending in a tine point, pubescence black, dense; antennae 

 dusky-red, annuli black, pubescence black on first two joints, a 

 well defined tooth on expanded portion of the third joint. 



Thorax dark reddish-brown, tomentum brown, greyish on 

 anterior and posterior margins, two lateral black stripes are 



