254 DIPTERA OF AUSTRALIA, 



aim Umpidce, venis j^ci^ll^dis, litura discali nulla. (J. — Abdomen 

 pubescens aj)ice juscitm. 



" Green. Antennae pale brown. Thorax with three reddish 

 stripes. Legs pale green, slender ; tarsi brown towards the tips ; 

 fore tibia much longer than the fore metatarsus. Wings limpid ; 

 veins pale ; no discal mark. ^. — Abdomen pubescent, brown at 

 the tip, much longer than that of the 5. Length of the body 

 2-2 J lines ; of the wings 3 J lines. 



Hob. — "Yan Diemen's Land." 



246. Chironomus australis, Macquart. 



(J. — Chironomus australis, Macq., Dipteres Exotiques, 2nd 

 Suppl. 1847, p. 9; 9, 4th Suppl. 1850, p. 12. 



"^. — Thorace rufescente, vittis fuscis ; scutello rufescente. Abdo- 

 mine nigricante, incisuris rufis. Pedibus rufis. Alls pallidis. 



" Antennae with brownish plumes. Metathorax black, with a 

 light grey down. The tawny rings to the incisions of the abdomen 

 narrow. Extremity of femora and base of the tibiae brownish ; a 

 little brown at the extremity of the tibiae and the joints of the 

 tarsi ; intermediate and hind tibiae finely haired beneath. Wings 

 with the transverse vein a little brownish. Long. 3J x 1. 



Hob. — " Tasmania." 



Obs. — Macquart says that the 2 differs only by the ordinary 

 sexual characters. 



Genus 2. Orthocladius, V.d. Wulp. 



Orthocladius, Y.d. Wulp, Tijd. Entom. 1873-74, XVII. p. 132. 



Antennae 2- + 12-jointed in (J, 2- + 5-jointed in 9. Thorax with 

 three stripes. Wings naked. Third longitudinal vein straight 

 or only a little curved, going nearly to end of anterior margin. 

 Costal vein sometimes extending a little beyond tip of third longi- 

 tudinal. Posterior branch of fifth longitudinal fork straight or a 

 little bent. Legs unicolou red; or only darker at articulations. In 

 fore legs metatarsus considerably shorter than tibia. ^ forceps 

 slender. 



