86 H. C. EFFLATOUN. 



pulchriceps Meig., System. Beschreib., III. 375.8. (Helophilus) 

 (1822) ; Macq., Suit, a Buff., I. 505.14. (1834) ; Germ., Fauna 

 in*. Europ., XXII. 22. (1839) ; Lw, Stettin. Entom. Zeitg., II. 

 26.2. (Helophilus) (1841) ; Rono., Dipterol. Prodr., 11.40.10. (1857). 

 Schin., Verb, zool.-bot. Ges. Wien., VII. 397.17. (1897). 



tceniopusi Mik, Wien. Entom. Zeitg., XVI. 114. (1897); 

 Girschn., 111. Wochenschr. Entom., II. 602. (1897). 



torridus Walk., List Dipt. Brit. Mus., III. 612. (1849). 



DIAGNOSIS: — Antennae dark brown; eyes touching in the 

 male for almost one half the length of the vertical triangle, and 

 with narrow dark bands. 



This fairly large and handsome species may easily be distin- 

 guished by the dark bands on the eyes and the very indistinct 

 thoracic stripes. 



DESCRIPTION;— Male: Face with a central black stripe and 

 two dull black stripes in the centre of the genae. The central 

 stripe extends from the end of the hollow below the antennas to 

 the end of the prominence of the face, while the two others 

 begin near the base of the antennas and end on a straight line 

 with the central stripe and are thin and narrow above, gradually 

 increasing in thickness in their base. The rest of the face, as well 

 as the mouth and jowls, are entirely covered with golden-yellow 

 dust and possess many yellow hairs. Frons covered with tawny dust 

 and longish black hairs above, to shining pale on the sides below, 

 except for a fairly large shining dark brown triangular area just 

 above the base of the antennae ; this triangle has an elongated 

 central depression, which extends from its base to two-thirds of 

 its height and the base of this triangle is pale yellow. Vertex is 

 shining black and somewhat rugose and possesses black hairs ; the 

 top of the vertical triangle is covered with orange-brown dust. 

 Pubescence on the occiput very short, dark and inconspicuous. 

 Eyes meet for a fairly long distance, reddish and with beautiful 

 orange-golden iridescence; they are hairy only for a small area 

 above, and possess (apart from their front and hind margins 

 which are black) live uneven black stripes, which are of about the 

 same width as the six reddish stripes left by the ground colour. 

 Antennae dark brown except for a small, roundish, orange spot on 

 the upper edge of the flat and oval third joint; arista fairly long, 

 thin and quite bare. 



Thorax of an indefinite greyish - yellow colour, some- 

 what shining towards the centre, and with four indistinct 

 darker stripes; the two side stripes are as a rule inter- 



