BY AKTHUR WHITE. 63' 



Fig. 10. Wing of Pferodoniia varief/afa. 



Male. Head small, consisting almost entirely of the eves,- 

 which are contiguous. Eyes densely hairy. Antennge set 

 low down beneath the head, apparently consisting of two 

 very small joints, terminated by a thickened arista. " Thorax 

 greatly nrolied, almost vertical in front, and covered with 

 dense pubescence: this pubescence, and also that on the 

 eyes, appears in some lights to be dark brown, in others 

 tawny. Scutellum yellow. Abdomen inflated, nbout as- 

 broad as long, the first segment l)lack, remaining segments 

 clear yellow, wdth a black dorsal stripe, which is contracted 

 in the middle and expanded on the margin of each segment. 

 Legs with anterior femora and tibiae yellow, middle and 

 posterior femora black, middle and posterior tibise brown ; 

 anterior and middle tarsi yellow, posterior tarsi brown. 

 Wings with the costal hump and small tooth-like projection 

 situated close to the wing tip ; discal cell with only two 

 issuing veins ; veins of wing yellow; squamae fringed" with 

 brown. 



The only other known Australian species of Pterodontia, 

 P. macquartii, is described as being black, with the scutellum 

 and sides of abdomen red; legs yellow; anterior femora 

 blade. The colouring of the legs will therefore at once 

 distinguish P. variegata, which has the anterior femora 

 yellow, the middle and posterior femora black, and middle 

 and posterior tibia) brown. 



This species is only known from a single specimen, which 

 was taken by Mr. F. M. Littler, at Lefroy, in the month of 

 January; it occurred on sandy heath land, and was cajjtured 

 whilst in flight. 



15. Oncodks, Labr. 



(Ogcudes, Latr. Heiiu]).^, Meig.). 



Head of the male larger than that of the female. Antennae 

 situated on the extreme lower part of the head, api^avently 

 two-jointed, the second with a thin apical style or arista. 

 Thorax very gibbous; scutellum large. Abdomen much 

 inflated. Legs short and simple, without any sign of 

 bristles, and the tibiae not spurred. Wings short in the male, 

 but larger and longer in the female. Venation much 



