864 DIPTERA OF AUSTRALIA, 



The GynopUstice frequent flowers; their young stages are 

 unknown. 



366. Gynoplistia vilis, Walker. (PL xxiii., fig. 30). 



Ctenophora vilis, Walk., Ent. Mag. II. p. 469, 1835 ; Gyno- 

 plistia vilis, Westwood, Lond. and Edin. Phil. Mag. YI. p. 280, 

 1835 ; G. nervosa, Westw., Zool. Journ. Y. No. 20, p. 447, p]. 

 xxii. figs. 10-11 ; G. flavitarsis. Macquart, Dipt. Exot. 4th Suppl. 

 p. 12, t. 1, fig. 2, 1850; G. vilis, Westw., Trans. Ent. Soc. 1881, 

 p. 369, pi. xviii. f. 6. 



^. — Length of antennae 0*180 inch ... 4*56 millimetres. 



Expanse of wings 0-410x0-100 ... 10-41 x 2-54 



Size of body 0-500 x 0-060 ... 12-70 x 1.54 



^. — Length of antennae 0-090 inch ... 2-27 millimetres. 



Expanse of wings 0-410x0-100 ... 10-41x2-54 



Size of body 0-520 x 0-060 ... 13-20 x 1-54 



Head with a greyish or yellowish-grey bloom ; rostrum, palpi 

 and antennae black or deep brown, the first joint of palpi and first 

 five (sometimes only the two basal) joints of antennae testaceous ; 

 the antennae 18- or 19-jointed in both sexes ; in ^ the first 14 or 

 15 flagellar joints rather elongate with a long branch, last two or 

 three branches becoming shorter ; the remaining two or three 

 joints sub-cylindrical ; in 9 the first 11 or 12 flagellar joints with 

 very short sub-equal branches, the last two or three branches 

 usually very short, terminal joint elongate, cylindrical ; in both 

 sexes the first three branches directed outwards. Thorax with a 

 greyish or yellowish-grey bloom (the ground-colour deep brown or 

 black), with more or less distinct traces of three brown or brownish 

 longitudinal stripes meeting in front of suture ; a lateral brown 

 stripe from anterior margin to origin of wings ; pleurae with a 

 grey bloom. Halteres ochreous-yellow with infuscated club. 

 Abdomen brown, sometimes deep brown ; the second to fourth 

 segments more or less deeply bordered anteriorly, and all the 



