32 H. c. efflatoun. 



DACUS LONGISTYLUS Wiedemann 

 (Pl. I figs. 6 and 9, PI. II fig. 3) 



UiED. Aussereurop. Zweifl. Ins., II. 522. 14. (1830). 

 Kinqi, Frogatt Proc. Linn. Soc. N.S. Wales, XXXV, 86(5. 

 (1910). 



DIAGNOSIS: — A light reddish-hroAvn, eomparatively large 

 species, distinguished by its very long and eylindrical ovipositor and 

 by the latéral swellings of the occiput. 



Maie and Female. Length of hody : 7 — 9 nnn. ; ovipositor : 

 3.5 mm. ; wing : 5.9-6.2 mm. 



DESCRIPTION:^ Frons yellow to reddish-yellow. '-xeept for 

 two small elongated blackish spots from wiiich arise the a. or.; sojne- 

 times the frons is dark brown below, at the base of the imtenuae; 

 . face light waxy yellow, very shining and with the two characterislic 

 rounded or oval black spots, one m each of the antennal furrows; 

 cheeks médium in breadth and of the same pale colour as the face, 

 which colour continues upwards along the margin of the occiput; 

 epistoma usually blackish except for a small space in the centro, in 

 front yellow; proboscis reddish-brown and possessing some erect pah; 

 yellow hairs; ocellar triangle blackish; antennae brownish-yellow 

 with the elongated third joint not pointed at the tip and usually 

 darker in colour, being dark reddish-brown; the second and third 

 joints bear a very minute shining white tomentum and in addition 

 the second joint possesses some very fine white hairs; arista dark 

 reddish-brown except on its basai third yellow to pale yellow; ail the 

 bristles are blackish. 



Thorax of a characteristic dark reddish-brown colour with 

 bright straw-coloured spots and entirely covered with a délicate 

 silvery white tomentum and a fine white pubescence which gives 

 it a brownish-grey appearance ; there are also three more or less in- 

 distinct longitudinal dark lines in the upper third of the dise; the 

 straw-coloured spots on the dise are disposed as follows : two large 

 oval spots covering the humeri, two elongated somewhat triangular 

 spots immediately bcfore the suture, and in the lower half, an 

 isolated triangular spot in the centre ; the pleurae also possess cons- 

 picuous straw-coloured spots as follows : one large spot covering ail 

 the posterior half of the mesopleurae and which is in reality a 

 continuation of the elongated spot immediately before the suture, 

 one small rounded spot on the upper end of the sternopleurae and 

 one large spot on the metapleurae; ail the l)ristles are hlack; scutol- 

 lum entirely pale yellow with 2 a.sr. 



Abdomen reddish-yellow to dark reddish-yellow, with the lower 



