50 SYRPHID^. 



sometimes wholly absent. Legs orange ; 6 with about basal half 

 of anterior femora, and hind femora wholly (except narrowly at 

 tips and sometimes very narrowly at base), black ; a broad median 

 blackish band on hind tibiae filling greater part of limb ; upper 

 side of hind tarsi and anterior tarsi more or less towards tips, 

 brownish. Pubescence of femora whitish, very sparse on tibiae, 

 and, with that of tarsi, more yellowish. In $ , legs all orange ; 

 an indefinite brownish median band on hind tibiae and upper side 

 of tarsi towards tips ; sometimes hind legs marked as in 6 . 

 Wings pale yellowish-grey ; stigma more yellow; halteres brownish- 

 orange. 



Length, 5-7 mm. 



Described from a good number of specimens from various 

 sources. Peshawur, v. 1916 (FletcJier) ; Simla (var. Iocs.); 

 Naini Tal : Darjiling; Kurseong ; Bengal ; Khasi Hills ; 

 Assam ; Assam-Bhutan Frontier ; Abor Country. Dr. de Meijere 

 records several specimens from Pattipola, Geylon, 2000 metres. 

 Apparently the commonest and most widely distributed species 

 of the genus in the East, occurring throughout all the warm 

 weather in the plains and hills. I am still undecided whether 

 orientale is specifically distinct from the common European 

 mellinum {v. my notes, Rec. Ind. Mus. xi, p. 207). 

 Type in Copenhagen Museum {teste Wiedemann). 



41. Melanostoma univittatum, Wied. 



Syrphus unimitatus, Wiedemann, Analec. Entom. p. 36 (1824) ; id., 



Auss. Zweifl. ii, p. 139 (1830). 

 Melanostoma univittatum, Brunetti, Rec. Ind. Mus. xi, p. 208, 



pi. xiii, figs. 4-G, head in profile, abdomen S -9 (1915). 

 Syrphus planifncies, Macquart, Dipt. Exot. Supp. 3, p. 43 (1848). 

 Syrphus cyuthiyer, Walker, Proc. Linn. Soc. Lond. i, p. 125 (1867); 



Eigot, Ann. "Soc. Ent. Prance, (6) iv, p. 86 (1884). 

 Melanostoma planifacies, de Meijere, Tijd. v. Ent. li, p. 313 (1908) ; 



liv, p. 346 (1911). 



S 5 . Head in S '• vertical triangle equilateral, a little elevated, 

 dark grey with blackisli hairs ; frons and face greenish-aeneous, 

 both with yellowish-grey dust and a little pale yellowish pubescence ; 

 face with outline in profile nearly perpendicular. Antennae orange, 

 tip of 3rd joint more or less blackish, arista orange at base. Pro- 

 boscis yellowish. Occiput blackish-grey, lighter grey towards 

 margin, which bears a slight fringe of pale yellow hairs. In $ , 

 frons and face enclosed by two straight lines, diverging slightly 

 downwards, forming one-third of head at level of antennae, both 

 moderately shining black with grey dust, which is less thick in 

 the median space just below vertex and almost absent just above 

 antennae ; frons and face with thin yellowish-grey pubescence. 

 Thorax and scutellum aeneous-black, sometimes with greenish or 

 cupreous tinge ; humeral region with a little yellowish-grey dust ; 



