12 J: DIPTERA OF AUSTRALIA, 



424. TiPULA NIGRICAUDATA, Macquart. 



T. nigricaudata, Macq. Dipt. Exot. Suppl. V. p. 16, p. 1, fig. 2, 

 1855. 



" ^ and 9- — Thorace Jiavido, vittis fuscis. Abdoi nine /err ugineo, 

 apice nigro. Antennis fuscis, basi rufis. Pedihus fuscis, femori- 

 bus basi ricfis. Alis subhyalinis, cellula mediastina fusca." 



Proboscis and palpi obscure; rostrum of ordinary length, fulvous, 

 of a greyish-black al)Ove. Front greyish-black, with the sides 

 more clear. Antennae : the first joints fulvous ; the others black, 

 cylindrical. Thorax greyish-yelloAv, pale, with four black stripes ; 

 the two lateral ones shorter than the intermediate ; scutellum 

 grey. Abdomen ferruginous ; fifth, sixth, and seventh segments 

 blackish ; ^ genitalia a little dilated ; ovipositor f urruginous, wdth 

 the extremity obscure. Legs blackish-brown; femora with the 

 basal half fulvous. Halteres fulvous, with obscure club. Wings 

 hyaline ; veins slightly bordered with pale brownish ; mediastinal 

 cell brown. Length 6 x 1 lines. 



J^aZ).— Adelaide (M. Bigot). 



Obs. — The above description difi'ers so little from that of 

 T. rnfiventris, that I feel almost warranted in assuming that they 

 both have reference to the same species. 



Genus 16. Pachyrrhina, Macquart. 



Fachyrrhina, Macq., S.aB. Dipt. I., p. 88, 1834; Dipt. Exot. 

 L, p. 48, 1838; O.-Sacken, Studies L, p. 184, 1886. 



First longitudinal vein joining anterior branch of second longitu- 

 dinal near the base ; prsef urea as long as or shorter than great cross- 

 vein ; second posterior cell sessile ; discal cell (? always) separated 

 from fifth posterior by a very short vein. Front convex, or gibbose 

 anteriorly. Rostrum short and thick ; nasus distinct, acute. 

 AntenniB normally 13-jointed, sometimes more ; in ^ usually 

 about the length of or longer than thorax, shorter than it in ^ : 

 flagellar joints beset with short stiif hairs at the base. ^ genitalia 

 rather incrassate, of complicated structure ; 2 ovipositor with 

 straight subulate valves. 



