86 DIPTERA OF AUSTRALIA, 



laterally; genitalia brown. Femora with not quite the basal half 

 reddish-fulvous ; hind tibiae with an indistinct brownish i-ing near 

 the base. Wings a little infuscated, darker in the costal cell ; 

 stigma small, distinct ; veins black. Ultimate section of anterior 

 branch of second longitudinal vein appearing as a continuation of 

 the first longitudinal ; second posterior cell with a short petiole ; 

 discal cell pentangular. 



Hab.—Moonhar, Mount Kosciusko, 3-3500 feet, N.S.W. 

 (Helms). A single specimen in March. In Coll. Aiostralian 

 Museum. 



b. (J antennae with short bi-anches. 



Genus 7. Plusiomyia, gen.nov. 



First longitudinal vein joining anterior branch of second longi- 

 tudinal vein near the base, the terminal portion of the branch 

 appearing as a continuation of the first longitudinal ; second 

 submarginal cell separated from discal by the small cross-vein ; 

 second posterior cell sessile, but usually in not more than puncti- 

 form contact with the discal. Front narrow, flattened, almost in 

 same plane with front of rostrum. Rostrum usually considerably 

 longer than the head, with minute, inconspicuous pubescence ; 

 nasus wanting. Antennae 13-jointed in ^, 15-jointed in Q ; in 

 both sexes a certain number of the flagellar joints provided with 

 a pair of short branches. Tarsi very long in the hind legs. ^ 

 genitalia not incrassate, of simple structure. 



The insects included in this genus, though evidently allied to 

 Ptilogyna and Platyphasia, offer certain striking diffei'ences, but 

 may be divided under two sections. The first division includes 

 species P. gracilis, Wlk., P. spectabilis, Sk., and P. Olliffi, Sk., 

 and are typical of the genus as above defined ; the second includes 

 two species, P. lineata, Sk., and P. inornata, Sk., which are 

 unfortunately known only by 9 specimens. The peculiar 

 flattened head, almost in line with the front of the long rostrum, 

 is constant throughout ; but the front is narrower in the first 



