188 I'ROCEEDINGS OP THE ROYAL SOCIETY OF QUEENSLAND. 



longer than tlic three anteiuial joints coiubined ; proximal 

 third plumose. ]\Iesofaeial plates brownish, showing 

 through the silvery pubescence. Ptilinal suture fairly 

 distinct. Vibrissa.^ strong. Four facials, the upper very 

 small. Four epistomials. Bristles on anterior part of gente 

 l)lack. exceedingly well developed ; succeeding bristles 

 brown : those on lower part of occiput silvery. A single 

 row of black bristles behind eyes; below these bristles are 

 others irregularly arranged. A single row of ten frontals 

 beside frontal stripe. Verticals fairly well developed. 

 Lateral verticals present. Proboscis dark brown, palps 

 paler brown. 



Thorax considerably narrower than head. Colour a 

 rather silvery grey, with three longitudinal lines of a brown 

 or black colour, the median one extending farthest back and 

 alone reaching the scutellum. The two accessory median 

 .stripes more than usually distinct. Sides and ventral 

 surface grey. Apical scutellars very well developed. 

 Dorsocentral row of bristles complete ; anterior ones rather 

 larger than usual. Three intra-alars. Four humerals, of 

 which the upper is very weak, the second even weaker, th^ 

 lower two strong. The last three pairs of posterior acros- 

 tichals, so far as can be made out in the material available- 

 are present. A row of five sternopleurals above the coxa 

 of third leg. Anterior spiracle rather small, covered with 

 brown hairs. 



Legs browm and (|uite devoid of hairs. The bristle 

 rows of first femur well developed. Besides the micro- 

 chaeta^ the second femur possesses only a few strong bristles, 

 especially at its extremity ; ' ' comb ' ' absent. On the third 

 femur the microchaetai are equally poorly developed. The 

 third tibia is provided with a number of abnormally large 

 spines. 



Wings. — Cell 5R almost closed. ]Medio-cubital nervure 

 almost reaching margin of wing. Aluhc and wings hyaline 

 and quite transparent. Costal nervure spiny as usual ; of 

 the others on '7 proximal part of vein R 4 -f- 5 hairy. 



Since the abdomen is not i)resent in the male material 

 available, nothing can as yet be said about the male 

 copulatory organs. 



