98 DIPTERA OP AUSTRALIA, 



flagelliform. Antennae a little longer than the rostrum ; first 

 joint of scapus obconical, about twice the length of the second, 

 second rather long, cyathiform ; flagellar joints progressively 

 diminishing in length to the last, narrower at the base, beset with 

 minute hairs (PI. vi., fig. 35). Front moderately broad, some- 

 what flattened, with a prominent tubercle immediately above the 

 basal joints of the antennae. ^ forceps narrower than the pre- 

 ceding segment, of simple structure (PI. vi., fig. 36). Legs long 

 and slender ; owing to the great length of the metatai'sal joint 

 the tarsi are moi'e than 2^ times the length of the tibia ; tibial 

 spurs short ; ungues minute. Wings lanceolate ; anal angle only 

 slightly developed. First longitudinal vein with the cross-vein 

 close to its tip, joining the anterior branch of the second longi- 

 tudinal near the middle, consequently the rhomboid cell very 

 small ; anterior branch of second longitudinal sinuated ; prgefurca 

 arcuated at base, short, almost in line with the remainder of the 

 vein ; inner ends of second submarginal and first posterior cells 

 obliquely in line ; discal cell oblong, pentangular, its inner end 

 forming an obtuse angle with the inner ends of the second sub- 

 marginal and first posterior cells ; second posterior cell in puncti- 

 form contact with discal, or with a short petiole ; fifth posterior 

 cell in punctiform contact with discal near its inner end ; seventh 

 longitudinal almost parallel with the margin. 



This genus is closely related to Habromastix, but may be readily 

 distinguished from it by the character of the antennae, tubercle on 

 the front, long I'ostrum, and venation. 



407. Phymatopsis nigrirostris, sp.n. (PL v., fig. 13.) 



(J. — Length of antennae 0*085 inch ... 2.14 millimetres. 



Expanse of wings 0-600 x 0-150 ... 15-24x3-81 



Size of body 0-560x0.080 ... 14-24 x 2-02 



Head slaty-grey, or more brownish ; frontal tubercle, face, and 

 joints of scapus fulvous ; rosti'um, palpi, and suctorial labella 

 black or deep brown ; the rostrum shining, densely clothed with 



