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/f 3 3 

 545. 

 HELOMYZA RUFA. 



Order Diptera. Fam. Muscidae. 



Type of the Genus, Helomyza tigrina Meig. 



Helomyza Fall., Meig., Curt. — Musca Linn., Fab., De Geer. 



Antennce inserted in a cavity near the middle of the face (2*), 

 rather remote, 5-jointed, basal joint the smallest and concealed, 

 somewhat cup-shaped and a little bristly, 2nd broad, fringed 

 with spiny bristles, forming a cup to receive the 3rd, which is 

 large, subovate and pubescent, 4th inserted on the back of the 

 3rd towards its base, small, subquadrate, 5th forming a long seta, 

 generally more or less feathered on both sides to the apex (3). 

 Labrum short and hollow {\b). 



Tongue not half the length of the labrum, and a little recurved 

 at the apex (r). 



Palpi longer than the labrum, stout, clavate, pubescent and 

 pilose on the inside {f). 



Lip short, stout and terminated by fleshy lobes, slightly hairy (^r). 

 Head globose-ovate, with a few long bristles on the crotvn: hypostoma 

 broad and hollow, with the centre convex, the clypeus whiskered, and 

 the gills pubescent : eyes verg remote in both sea:es, lateral, globose 

 and rather small but prominent. Ocelli 3, forming a compact tri- 

 angle, and elevated on the croion. Thorax oblong and bristly, as 

 tvell as the scutellum, lohich is semiovate. Abdomen narrow, in- 

 curved and clavate at the apex in the male, shorter and conical in 

 thefeinale. Wings incumbent, long, ample and rounded, with 2 

 transverse nervures, the costa setose: halteres small, dilated and 

 trigonate at the apex. Legs sometimes tolerably stout and hairy .- 

 thighs generally bristly above and stoutest in the males : tibiae ivith 

 a bristle outside towards the apex (8), and the intermediate with 3 or 

 4 others at the apex: tarsi 5-jointed, basal joint the longest, 4th 

 sublimate : claws strong, pulvilli large, bilobed, with a pubescent 

 process between them (*, 8, afore leg). 



RuFA Fall., Meig.— Curt. Guide, Gen. 1328. 2. 



Ochreous, clothed with black pubescence and bristles, head and 

 thorax rather darker, excepting the hypostoma : eyes rufous ; 

 antennae ferruginous, seta black and feathered ; thorax with 3 

 brown lines down the centre and 4 or 5 dots in a line on each 

 side producing as many bristles ; abdomen with a black spot 

 under the postscutellum, the margins of all the segments black, 

 excepting the last, broadest in the middle and forming a some- 

 what interrupted line down the back : wings sometimes brown- 

 ish or clouded with pale fuscous, 2 blackish spots on the trans- 

 verse nervures, and the apical portion tinted with the same 

 colour, leaving 2 transparent semicircular spots at the tip, and 

 a roundish one behind them : halteres ochreous-white : thighs 

 stout in the male, 4 posterior sometimes tipped with black and 

 the tarsi, excepting the 2 basal joints of the same colour. 



In the Author's and other Cabinets. 



The names of some specimens transmitted to M. Meigen by 

 Dr. Leach having been transposed and illegibly written, led to 



