6^ 



401. 

 TROPIDIA RUFOMACULATA. 



Order Diptera. Fam. Syrphidae. 

 Type of the Genus, Eristalis milesiformis Fall. 

 Tropidia Meig., Curt. — Eristalis Fall. — Musca Harr. 



AnteniiiB inserted in a small cavity at the upper part of a protu- 

 berance, near the middle of the face, approximating, small, 6- 

 jointed, basal joint short cylindric, 2nd stouter pilose, somewhat 

 obconic, 3rd very large rhomboidal, rather fleshy and velvety, 

 4th and 5th very small, inserted near the base of the 3rd on the 

 upper side, 6th a long naked bristle (3). 

 Labrum long and hollow, the apex emarginate (lb). 

 Tongue as long as the labrum rather long horny and acute (c). 

 MaxillcB nearly as long as the tongue and sublanceolate (e). 

 Palpi shorter than the maxillae, to the sides of which they are 

 attached, slender, slightly clavate and pilose (f). 

 Lip rather large, sometimes porrected horizontally, terminated 

 by 2 large pilose lobes (g). 

 Head semiglobose : face projecting in a keel over the clypeus. Eyes 

 large oval meeting before in the male, approximating in the female 

 (2*). Ocelli 3 in triangle. Thorax suhquadrate-globose. Scutellum 

 semicircular. AhAovatnincrassatedat the apex beneath, and furnished 

 with 2 short appendages and 2 fascicles of curved hair in the males. 

 Wings pubescent parallel and incumbent in repose. Halteres small 

 and capitate. Legs small, excepting the hinder pair which are large 

 with the thighs incrassuted, producmg a strong triangular tooth be- 

 neath towards the apex (8f) : the tibiae are stout and curved. Tarsi 

 5-jointed, basal joint the longest, 4th crescent-shaped, 5th obconic. 

 Claws and Pulvilli distinct. 

 Obs. The species figured was also the one dissected. 



RuFOMAcuLATA Curt. Guidc, Gen. 1243. 1. — milesiformis? Meig. 3. 

 347. 2. 



Black, shining and pubescent : antennse and eyes castaneous ; 

 face clothed with white pubescence, as well as the underside of 

 the thorax, a spot on each shoulder and one near the base of 

 each wing: scutellum with the posterior margin ochreous : abdo- 

 men with the 2nd and 3rd segments orange ochre which colour 

 extends over the tips of the basal joint ; the posterior margins 

 ferruginous-brown with a black stripe down the centre, 4 th seg- 

 ment with a small ochreous spot on the centre and a large space 

 on each side at the base covered with grey pubescence : wings 

 iridescent, slightly tinged with yellowish fuscous, the ner- 

 vures and stigma brown : halteres pale yellow : 4 anterior feet 

 with the tips of the thighs, the base of the tibiae and the tarsi 

 (excepting the penultimate joint which is black) ferruginous- 

 ochre, a very small space at the base of the posterior tibiaa of 

 the same colour. 



In the Author's and other Cabinets. 



