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649. 

 ORTALIS GUTTATA. 



Order Diptera. Fam. Muscidae. 



Type of the Genus, Musca crassipennis Fab. 



Ortalis Fall., Meig., Macq., Curt. — Hernia and Ceroxys Macq. — 

 Seioptera Kirb. — Tephritis Fab., Lat. 



Antenn(E inserted below the forehead, small, remote, deflexed, 

 divaricating, 5-jointed, basal joint rather small and obovate, 

 2nd large, obconic, bristly, 3rd the largest, compressed, ovate, 

 the apex sometimes recurved and pointed, 4th minute, inserted 

 upon the back of the 3rd near the base, 5th a long seta, some- 

 times pubescent (3). 



Trophi concealed in a cavity at the bottom of the face {2* g). 

 Labrum (1 b) and Tongue (c) very short, the latter acute. 

 Mandibles and Maxilla none. Palpi as long as the lobe of the 

 lip, slender, slightly clavate and pilose (/). 

 Lip very short, terminating in a large cleft and hairy lobe {g). 

 Head large and globose (2, the profile, 2 * the face) : clypeus convex, 

 naked : eyes remote, lateral and ovate : ocelli minute, 3 in a triangle 

 on the crown of the head. Thorax oblong : scutel semiorbicular. 

 Abdomen short, rather broad, depressed, ovate, 5-jointed : ovipositor 

 slender, exserted. Wings ample, rounded, erect and vibrating : 

 halteres small and capitate. Legs rather short : thighs, anterior 

 the shortest, with long bristles towards the apex and on the inside (8) .• 

 tibiae, anterior the shortest, intermediate the longest and slenderest, 

 with a bristle outside near the apex, and 2 long spurs on the inside 

 (*) ; hinder pair nearly as long, stouter, hit not spurred (f) .• tarsi 

 5-jointed, basal joint the longest, 4th the shortest, obtrigonate. 



Guttata Meig. v. 6. p. 380. 25. — Curt. Guide, Gen. 1296. 4^. 



Grey, face yellowish- white, a broad bright ferruginous stripe on 

 the crown, extending from the oceUi to the antennae, which are 

 of the same colour, the 3rd joint brown above, seta naked : 

 thorax with 2 narrow brown stripes dowTi the fore part, and a 

 short one on each side towards the scapulae ; abdomen pubescent 

 with a yellowish-brown tinge, deepest towards the apex ; wings 

 reddish-brown, palest at the basal angle, with 6 transparent spots 

 round the margins and one on the disc : tibiae and tarsi black. 

 In the Cabinets of Mr. Clifton, Mr. Dale, and the Author. 



Ortalis approaches Tephritis (fol. 241.), but is distinguished 

 by its larger and rounder head, more remote antenna?, and 

 more ample wings, and the ovipositor is slender. 



Macquart has formed 2 other genera out of Ortalis, and 

 Mr. Kirby has separated the two last species. 



1. Ceroxys Macq. Srd joint of antennae terminating in a 

 curved foiiit. 

 1. crassipennis Fah. — Meig. pi. ^6.f. 23. 



End of June to 19th August, marshes, Horning, Norfolk; 



