604 LIST OF DIPTERA. 



Helophilus sejunctus, n. s., mas. Niger, abdominis segmentorum 

 laleribus ferrugineo maculatis, antennis pedibusque fulvis, tibiis 

 posticis femoribusque piceis, Mis ferrugineo cinctis, femoribus 

 posticis cyaneis, alis limpidis. 



Body black: head covered in front with a hoary bloom, tawny 

 around the mouth, which is black with a tawny tip : feelers tawny : 

 eyes red : sides of the abdominal segments adorned with ferrugi- 

 nous spots : legs tawny ; hips black ; thighs and hind shanks pitchy, 

 the latter adorned with ferruginous bands ; hind thighs blue, very 

 thick : wings colourless ; wing-ribs piceous ; veins black. Length 

 of the body 4 lines ; of the wings 6 lines. 



a. Senegal. 



Helophilus Longus, n. s., mas. Niger, fronte flava, thoracis late- 

 ribus scutellique margine postico fulvis, abdominis fasciis flams, 

 antennis pedibusque fulvis, femoribus basi piceis, pedibus posti- 

 cis nigris, alis subfuscis. 



Body black : head broader than the chest, covered behind and 

 beneath with hoary down, yellow, and adorned with white shining 

 down in front : eyes red ; facets above successively increasing 

 in size from the hind part to the fore part : mouth pitchy, with a 

 tawny tip ; palpi also pitchy, with tawny tips : feelers tawny : chest 

 very thinly clothed with short tawny hairs ; its sides and the hind 

 border of the scutcheon are tawny : abdomen tapering from the 

 base to the tip, a little narrower than the chest, and nearly twice its 

 length ; hind borders of the segments yellow ; segments from the 

 first to the third adorned with broad yellow bands, the first entire, 

 the second and third interrupted ; the first and the second connected 

 on each side : legs tawny ; thighs at the base and hips piceous ; 

 hind legs black, their thighs armed near the tips beneath with two 

 strong teeth : wings slightly brown ; wing-ribs piceous ; veins 

 black, piceous towards the base ; poisers tawny. Length of the 

 body 6 lines ; of the wings 10 lines. 



a. Congo. 



Helophilus quadrivittatus. Eristalis quadrivittatus, Wied. Auss. 

 Ziveif. ii. 168, 22. 



a. East Indies. From Archdeacon Clerk's collection. 



b. ? From Mr. Children's collection. 



c. ? 





