409. 

 DIXA NEBULOSA. 



Order Diptera. Fam. Tipulidas. 



Type of the Genus, Dixa maculata Meig. 



DixA Meig., Macq., Curt. 



AntenncE inserted between the eyes in two large fleshy cavities, 

 as long as the thorax, setaceous, pubescent, composed of 16? 

 joints, basal joint robust subquadrate, 2nd larger subovate, the 

 remainder slender and tapering, the 3rd the longest, the follow- 

 ing of nearly equal length (3). 



Tropin short, excepting the Palpi which are incurved, pubescent, 

 pilose and 4-jointed, basal joint small, 2nd and 3rd twice as 

 long, nearly of equal length, 4th long and slender (f), Labrum 

 acuminated. Maxillce or Mandibles and the Tongue acute. 

 Lip dilated, pilose and bilobed, each lobe truncated obliquely (g). 

 }\e2iA small subglobose : eyea prominent and globose (Jig. 2, head viewed 

 behind; 2* front view of head) . OceWi ?ione. Thorax gibbose, pro- 

 jecting over the head : scutellum small and semicircular (A). Wings 

 longer than the abdomen, incumbent and parallel when at rest, iri- 

 descent with 2 furcate iiervures on the margin. Halteres clavate. 

 Abdomen linear. Legs long and slender. Thighs and Tibiae of equal 

 length. Tarsi 5-jointed, basal joint nearly or quite as long as the 

 tibicB, 4th and 5th nearly of equal length. Claws minute, curved 

 and acute. 



Nebulosa Meig. v. 6. p. 293. 5. — Curt. Guide, Gen. 1 166. 



Ochreous : eyes black : antennae fuscous : thorax with a double 

 black line down the centre of the anterior half, and a double 

 black one on each side, abbreviated before, and between them is 

 a fine line down the middle : postscutellum black : Abdomen 

 rosy brown, margins of the segments pale : Wings pale yellow, 

 clouded with cinereous, with portions round the nervures and a 

 spot on the transverse nervures at the disc, brown : tips of thighs 

 and tibiae black, tarsi fuscous. 



In the Cabinet of Mr. Haliday. 



This genus, like many others of the Tipulidae, is very much 

 confined to northern latitudes. Macquart has described only 

 two species, the D. astivalis and D. apriliiia, and says they 

 inhabit marshy woods in the North ot" France, but are both 

 rare. 



The name Dixa is descriptive of the two bifurcate nervures 

 of the wings, which distinguish it from its congeners. I am 

 indebted to A. H. Haliday and F. Walker, Esquires, for 



