540 Syrphidae. 



are long at the basal corners. Genitalia black-Haired, they are of a 

 somewhat curious shape, the ninth segment below with its side parts 

 swoUen and brownish. Venter æneous with not long, pale hairs, at 

 the hind margin of fourth segment long, dark hairs. Legs relatively 

 not strong, black, the knees and base of tibiæ more or less yellowish, 

 sometimes very obscurely; the three basal joints of the middle tarsi 

 may be more or less pale, and the hind tarsi may have the apex of 

 the same joints more or less brown; sometimes also the front tarsi 

 a little pale; hind femora only moderately thickened, with two rows 

 of not quite short spines below the apical third; hind tibiæ somewhat 

 strongly and rather abruptly thickened in about the apical two thirds, 

 hind metatarsi slightly thickened: the legs haired about as in strigatus; 

 the hairs yellow but the short hairs at the apex of hind femora and 

 at the apical part on the anterior side of anterior femora black, and 

 also about the middle of hind tibiæ are black hairs; at the apex on 

 the posterior side of hind tibiæ are some long, bristly hairs as in 

 strigatns. Wings almost hyaline or more or less brownish tinged; 

 stigma blackish; cubital vein very slightly curved, almost straight; 

 medial cross-vein placed behind the middle of the discai cell. Squamulæ 

 whitish with a darker yellow margin and fringe, Halteres yellow. 



Female. Slmilar; vertex and frons somewhat narrow, much nar- 

 rower than in strigatus, almost parallel-sided ; they are æneous, shining, 

 the frons grey pruinose at the eye-margins and with more or less 

 vague side dust spots; the hairs are yellow but blackish at the ocelli 

 and just above the antennæ. Epistoma less densely pruinose than 

 in the male. Antennæ with the third joint larger. 



Length 7,5 — 8,5 mm. 



This species is easily distinguished from the somewhat similar 

 strigatus by the shape and size of the head and frons, the place of 

 the antennæ, the hairiness of the eyes and the short-haired and black- 

 haired end of abdomen; besides it is narrower and much darker. 



E. ornatus is somewhat rare in Denmark and more rare than 

 strigatus; Faxe Ladeplads (the author); on Lolland at Maribo (Schlick); 

 on Langeland at Lohals (the author), and in Jutland at Horsens 

 (O. G. Jensen). My dates are ^^/g to the beginning of August. It occurs 

 in woods on bushes and in low herbage on more or less sunny piaces. 



Geographical distribution: — Europe down into Italy; towards the 

 north to southern Sweden. 



4. E. ruficornis Meig. 



1822. Meig. Syst. Beschr. III, 206, 5. — 1848. Loew, Stett. ent. 

 Zeitg. IX, 127, 13 et 1855. Verh. zool. bot. Gesell. Wien, V, 688, 694. — 



