102 DIPTERA OF AUSTRALIA, 



(in reality the great cross-vein joining fourth longitudinal slightly 

 beyond inner end of fourth posterior cell). 



Hah. — Northern Australia (Darnell) ; Fairy Bower, Manly, near 

 Sydney (Mr. H. Prince), one specimen in November. 



Obs. 1. — I have seen only two examples of this magnificent 

 insect, both of which were captured at Manly. 



Obs. 2. — In the specimen before me the anterior tibise measure 7 

 lines, the tarsi 12 lines ; while the posterior til)ite are 9 lines and 

 the tarsi 16 lines. 



409. Semnotes imperatoria, Westwood. 



S. imperatoria, Westw., Trans. Ent. Soc. Lond. p. 502, pi. iii. 

 fig. 1, 1876. 



(J. — Length of antennae — inch ... — millimetres. 



Expanse of wings 1-090 x 0-220 ... 27-67x5-58 



Size of body 0-760x0-240 ... 19-32x6-09 



Q. — Length of antennse 0-060 inch ,.. 1-54 millimetres. 



Expanse of wings 1-220x0-320 ... 30-98 x 8-12 



Size of body 0-910x0-300 ... 23-11x7-62 



Stramineous-yellow, opaque, variegated with black. Antennae 

 black or bi'own (in one ^ specimen the first joint of the scapus 

 yellowish). Thorax smaller in ^ than in 9 ; the anterior portion 

 black ; a transverse (usually large) black spot above the origin of 

 the wings, immediately behind the suture ; suture black ; pleurae 

 (from behind fore coxae) black, with a large triangular yellow 

 spot beneath origin of wings ; pectus black ; each side of scu- 

 tellum and the metathorax (except metanotum) black. Halteres 

 black. Abdomen shorter and narrower in ^ than in 9 '} fij'st five 

 segments traversed by a broad black median stripe, the second to 

 fourth with a narrow margin of black posteriorly which expands 

 into a tolerably large spot laterally ; venter very similarly marked 

 to the upper side, except that the median stripe is suddenly nar- 

 rowed on the posterior half of the second segment. Fore coxae 



