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the antennae, narrower than the width of the head, densely covered 

 with a yellow tomentum except on both the frontal callus and ocellar 

 portion, the yellow part usually separated by a fine very short longi- 

 tudinal black and shining line which extends from the frontal callus to 

 the ocellar triangle, and the lateral yellow parts consequently triangular 

 in shape ; pubescence very few, yellowish, not long ; frontal callus 

 large almost occupied the lower half of the frons, but hardly touching 

 to the eye-margins, convex, black and shining, its upper margin convex 

 and its lower margin slightly angulated at the middle, with a narrow 

 double arched yellow line between the antennae and frontal callus ; 

 vertex black and shining, but covered with a yellow dust behind the 

 ocellar triangle which is somewhat convex and brownish, and bears a 

 few short somewhat darker hairs ; occiput greyish brown because it is 

 slightly covered with a greyish yellow tomentum, a few long yellow- 

 ish hairs just behind the vertex. Face orange yellow, moderately 

 convex and slightly produced below, longer than half the width of the 

 face ; yellow intermediate stripe short, pointed below, and suddenly 

 broadened transversely just before the antennae, not reaching below 

 beyond the lateral deep pits ; yellow lateral patch as in the male of 

 Chrysops dispar, Fab., but usually orange yellow ; facial calli black 

 and shining, rather larger and circular, united with a very short un- 

 divided oral callus which is similar colour and is broader than its 

 length but somewhat roundish ; buccal CcVili large, black and shining, 

 extending from the eye-margin to near the base of palpi, transverse 

 and somewhat quadrate ; jowls behind the buccal calli black and shin- 

 ing, but at the outersides narrowly covered with a yellowish dust, the 

 yellowish line becoming very narrow and extending np to .the occiput 

 along the eye-margin, the rest part usually inconspicuously obscured 

 by a yellowish tomentum which extends through the back of the head, 

 bearing rather numerous moderately long yellowish soft hairs which 

 become very short and extend up to the back of the head at where 

 these are only appeared iust behind the narrow yellow line along the 



