1908 •] Records of the tndian Museum. 67 



H. tubcrculatus, mihi, sp. nov. (PI. xii, ligs. 16, 17.) 

 a' 2 . Calcutta. Long. 19-25 mm. 



Head: epistome normally produced. Front black, shining just 

 above antennae, dull in the 9 from thence to vertex. Eyes 

 contiguous ( 2 ) at base of supra-antennal triangle, diverging gentlv 

 to the vertex. Front in 9 moderately wide, narrower above ; 

 face below antennge blackish or reddish, with grey or yellow hair, 

 antennse ferruginous brown to black ; 3rd joint sometimes quite 

 grejnsh ; first two joints with a few black hairs. Front, vertex, and 

 back of head with short, stiff, all-black hair. 



Thorax rather elongated, yellowish, with three broad black 

 long stripes of equal width (third abbreviated behind) placed 

 close together, so that the yellow intermediate space is ver^^ narrow ; 

 dorsum covered with short 3^ellow hair. Humeral calli brown, 

 with yellowish hair ; posterior calli oval, distinct, shining. Sides 

 of thorax blackish grey with mixed tufts of brown, white and 

 yellow hair ; scutellum yellow with yellow hair. 



Abdomen quite elongated, resembling that of a Milesia ; in the 

 d" the ist segment very short, yellow ; 2nd tawny, with a thin 

 basal black line produced dowmwards across the disc to a rather 

 wide, very indistinct blackish band towards posterior border ; 

 3rd segment, basal half tawny, apical half brown; 4th segment 

 similar, but only basal fourth yellowish ; 5th segment uniformly 

 rich brown. In the 2 the transverse bands across the hind parts 

 of the segments are black instead of brown. 



In the a" the first three segments are covered with soft yellow- 

 hair, much thicker on 2nd segment ; this hair appears to be sparser 

 in the 2 . 



Legs all black, knees of four anterior legs tawny ; all tlic 

 femora much thickened in the a" , but only the posterior pair moder- 

 ately so in the 2 . In the (f , the hind femora bear a distinct 

 tooth in the centre of the under side, and an erect fringe of bright 

 yellow hair on upper side for three-fourths of the length from the 

 base, the remaining fourth bearing black hair. The middle femora 

 l)ear a transverse ridge below near the tip, followed by a small 

 blunt tooth ; the middle tibicC are suddenly incrassated before the 

 middle, and bear two j^airs of blunt teeth at the base. 



All the legs with short black ]nibescence, longest on femora 

 and posterior tibi?e. 



Wings brownish grey ; apical half, anteriorly, darker. 



Described from two 0- cf and three 2 2 from Calcutta in the 

 Indian Museum. A remarkable species, and one which, from the 

 elongated, almost cyfindrical abdomen, and denticulated middle legs 

 in the c^ , will no doubt require the erection of a new genus for its 

 reception. I, however, refrain from doing this prematurely ; in all 

 other respects it agrees with Helophilus. Moreover, it must be 

 closely allied to a recently described species by Meijere, from the 

 Aru Islands (//. caudatus), from which, however, the denticuiation 

 of the middle tibiae at once distinguishes it 



