BY FREDERICK A. A. SKUSE. 775 



304. Thrypticomyia aureipennis, sp.n. (PI. xxi., fig. 6). 



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



Expanse of wings 0-190 x 0-040... 4-81 x 1-01 



Size of body 0-165x0-020... 4-18x0-50 



Head and antennae brown ; rostrum and palpi ochreous or 

 brownish. Thorax short and arcuated, light ochreous-brown, 

 somewhat darker in the mesonotum ; sub-levigate. Halteres long, 

 slender, inf uscated, pale at the base of stem. Abdomen including 

 forceps brown. Legs very slender. Coxae and extreme base of 

 femora ochreous ; remaining joints brown, the tip of first tarsal 

 joint and whole of last four joints white. Wings sub-hyaline, 

 with extremely brilliant, chiefly golden, reflections ; veins and 

 stigma brown. Auxiliary vein reaching costa opposite origin of 

 second longitudinal vein ; sub-costal cross-vein a short distance 

 (the length of marginal cross-vein) from its tip ; supernumerary 

 cross-vein situated about opposite inner end of first posterior cell ; 

 first longitudinal vein disappearing before end of stigma, the 

 latter enveloping this vein from opposite inner end of sub-marginal 

 cell ; marginal cross-vein situated before tip of first longitudinal 

 vein a distance at least equal to its length ; praefurca slightly 

 arcuated at its origin ; discal cell usually longer than broad, 

 sometimes nearly square ; its inner end usually somewhat before 

 inner end of first posterior cell, and its anterior angle sometimes 

 with a small stump of a vein ; great cross-vein situated about its 

 middle. 



Hob. — Sydney ; six specimens (Masters). 



Ohs. — This insect has a very delicate aerial appearance. 



Genus 3. Geranomyia, Haliday. 



Geranomyia, Hal., Entom. Mag. I. p. 154, 1833; Curtis, Brit. 



Entom. XII. p. 573, 1835 ; Limnohiorrhynchus, Westw., Ann. 



Soc. Ent. Fr. 1835, p. 684; Trans. Ent. Soc. Lond. 1881, p. 375; 



Ajyorosa, Macquart, Dipt. Exot. I., p. 62, 1838; Loew, Linn. 



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