BY FREDERICK A. A. SKUSE. 763 



Auxiliary vein reaching costa a short distance beyond origin of 

 second longitudinal vein ; sub-costal cross-vein situated immedi- 

 ately before the origin ; first longitudinal vein continued some- 

 what beyond the marginal cross-vein, joined to costa by a super- 

 numerary cross-vein exactly in line with and half the length of 

 the marginal cross-vein ; praefurca arcuated near its base, not quite 

 twice the length of distance between origin of third longitudinal 

 vein and small cross-vein ; discal cell closed, the great cross-vein 

 a short distance before its inner end. 



Hah. — Near Coogee Bay, Sydney (Skuse). A single specimen. 



Ohs. — The peculiar wing-cloudings, thoracic markings, and 

 character of the first longitudinal vein make this species easily 

 distinguished. 



292. DiCRANOMYiA Helmsi, sp.n. 



(J. — Length of antennae 0-050 inch ... 1-27 millimetres. 



Expanse of wings 0'300 x 0-080 ... 7'62 x -2-02 



Size of body 0-240 x 0-04:0 ... 6-09x1-01 



9' — Length of antennae 0-055 inch ... 1-39 millimetres. 



Expanse of wings 0-350 x 0*090 ... 8-87x2-27 



Sizeof body 0-290x0-040 ... 7-35x1-01 



Head brown, sericeous with yellowish ; rostrum, palpi and 

 antennae black ; rostrum in ^ rather shorter than, in ^ as long 

 as, the head. Thorax brown, sericeous with yellowish (shining 

 when denuded of the bloom), the sericeous dust thickest at the 

 sides, thus leaving a brownish median stripe ; pleurae, pectus, scu- 

 tellum and metathorax sericeous with grey. Halteres pale, club 

 infuscated. Abdomen dark brown, with the appearance of a 

 yellowish or yellowish-grey bloom, sparingly clothed with yellowish 

 pubescence ; ^ forceps inconspicuous, dark brown ; ^ ovipositor 

 brownish-ochraceous. Legs blackish-brown, base of femora and 

 the trochanters somewhat testaceous. Wings sub-hyaline, the 

 veins almost imperceptibly clouded with pale greyish ; stigma 

 rather long, pale, indistinct ; veins cinereous. Auxiliary vein 



