85 H. C. EFFLATOUN. 



'piilrhricepsMziG., System. Beschreib., ITI. 375.8. {Helojjhilus) 

 {li22) : Macq., Suit, à 'Buff., I. 505.14. (1834) ; Germ., .Fauna 

 1ns. Europ., XXII. 22. (1839) ; Lw., Stettin. Entom. Zeitg., IL 

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

 ScHiN., Verh. zool.-bot. Ges. Wien., VII. 397.17. (1897). 



tœnioftis, MiK, Wien. Entcm. Zeitg., XVI. 114. (1897); 

 GiRSCHN., 111. Woclienschr. Entom., II. 602. (1897). 



torrldasWALK., List Diot. Brit. Mus., III. 612. (1849). 



l)IAGNOSIS:~A\\XQnïi?e dark brown; eyes touthing in the 

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

 with narrow dark hands. 



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 :~Mule: Face with a cential black .stripe and 

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

 stripe extends f rom the end of the hollow below the antennte to 

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

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

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

 increasingin 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 nuany 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 antennse ; this triangle lias an elongated 

 central dépression, 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 orangc-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 

 whicli are black) five iineven black stripes, which arc of about the 

 same w^dth as the six reddish stripes left by the ground colour. 

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

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

 thin and quite barc. 



Thorax of an indefinite greyish - yellow colour, some- 

 what shining towards the centre, and with four indistinct 

 darkcr stripes; the two side stripes ai'c as a ruk inter- 



