BY FREDERICK A. A. SKUSE. 869 



Head black, somewhat, shining, clothed with black hairs; 

 rostrum, palpi, and antennae black, the two basal joints of the 

 latter sometimes fulvous ; ^ antennae 18- or 19-jointed, the first 13 

 or 14 flagellar joints'^ with long branches, decreasing in length from 

 eighth or ninth joint, the fourteenth, when present, a mere tooth ; 

 last three or four joints elongate-elliptical, the terminal one 

 usually elongate-cylindrical ; ^ 17- or 18 -jointed, the first 9 or 10 

 flagellar joints with short branches, decreasing in length from 

 sixth or seventh joint, the tenth, when present, very rudimentary ; 

 last five or six joints more or less elliptical, the terminal one 

 usually elongate ; in both sexes the first two branches directed 

 outwards. Thorax deep black, slightly shining, with three longi- 

 tudinal narrow stripes of greyish-yellow bloom or microscopic 

 pubescence (visible only at a certain obliquity) from anterior 

 border to transverse suture, also two large distinct sub-triangular 

 yellow spots of similar character to stripes immediately below the 

 humeri ; pleurae and coxse with a grey, almost hoary, bloom. 

 Halteres black. Abdomen reddish-fulvous, the first and last two or 

 three segments deep black : genitalia reddish-fulvous ; ^ forceps 

 (PI. XXIV., fig. 66) armed with a single, somewhat hooked, 

 appendage; ^ ovipositor rather long, slightly curved. Coxse and 

 tarsi deep black ; femora fulvous or reddish-fulvous, with a broad 

 ring of black at the apex ; tibiae black, the basal half (except a 

 ring of black at base), more or less fulvous or reddish-fulvous. 

 Wings slightly tinted with yellov/ish, the basal portions more 

 fulvous (but black at the origin), with three blackish (in 

 fresh specimens) or dark brown equidistant, irregular fasciae, 

 and the costal cell and apex (from inner end of second pos- 

 terior cell) clouded with a somewhat lighter blackish or brown, 

 the posterior margin slightly clouded with greyish ; the first fascia 

 not nearer base of wing than humeral cross-vein, sometimes 

 interrupted in the axillary cell and at posterior margin, connected 

 to next fascia by a vitta filling the intervening portion of anal 



*Sometimes the fifteenth flagellar joint also has a very rudimentary tooth 

 of a branch. 



