Rhingia. 393 



— Thorax æneous black, in the female more greyish ; abdom- 

 inal margin black ; legs with the basal half of femora black 

 in both sexes, and tibiæ with dark rings 2. campestris. 



1. R. rostrata L. 



1758. Linn. Syst. Nat. X, 604 and 1767. XII, 2, 1004, 1 {Conops). — 

 1775. Fabr. Syst. Entom. 791, 1 et 1805. Syst. Antl. 222, 1. — 1817. Fall. 

 Dipt. Suec. Syrph. 33, 1. — 1822. Meig. Syst. Beschr. III, 258, 1. — 1843. 

 Zett. Dipt. Scand. II, 684, 1. — 1862. Schin. F. A. I, 326. — 1901. Verr. 

 Brit. FL VIII, 478, 1. — 1907. Kat. palåarkt. Dipt. III, 89. 



Male. Vertex black; frons and epistoma reddish, the margin of 

 the frons and the eye-margins somewhat greyish or whitish pruinose. 

 Vertex with long, black hairs; frons and epistoma bare but the eye- 

 margins with short, pale hairs. Occiput black, greyish pruinose, the 

 hairs whitish below, yellow or brownish above, but along the upper 

 eye-margin long, black hairs. Antennæ red, third joint ovate with a 

 very slightly pronounced point at the end. Thorax black, a little 

 bluish; it is somewhat dark bluish grey pruinose but shining, especi- 

 ally behind; there are four darker, more shining stripes, two approx- 

 imated in the middle, abbreviated behind, and one at each side, inter- 

 rupted at the transverse furrow ; the humeri are brownish, grey pruinose, 

 and also the postalar calli a little brownish. Thorax is clothed with 

 somewhat short, brownish black hairs, brown in front; they are 

 longest behind; on the postalar calli and in the præsutural depression 

 they are likewise long and somewhat strong, some of them almost 

 bristly. Scutellum red or reddish brown with black hairs; somewhat 

 long, especially at the margin, and here somewhat bristly ; just at the 

 base are yellow hairs, and the fringe below the margin yellow. Pleura 

 with black hairs, pale below and behind and sometiraes mainly yellow. 

 Abdomen yellow or reddish yellow, the first incisure narrowly black 

 and on second segment an abbreviated, blackish dorsal stripe; ab- 

 domen is clothed with short, yellow hairs, but at the hind margins 

 of the segments, at the sides and on fourth segment are more or 

 fewer black hairs. Genitalia black. Venter reddish yellow with long, 

 pale hairs, fourth segment with short, black hairs on the middle. 

 Legs reddish, the basal part of femora more or less darkened and 

 hind tarsi darkened or blackish. The long hairs on front femora 

 black, on posterior femora yellow with some black towards the apex ; 

 all the short hairs mainly blackish. Wings a little yellowish tinged, 

 especially at the anterior margin. Squamulæ dirty yellowish with a 

 reddish yellow fringe. Halteres yellowish with the knob more or less 

 brownish. 



