192 



333* Wings slightly tinned brownish, legs blackish but the 

 tibiae reddish brown or dull yellow. 

 4. Broader species, with continuous large greyish median 



triangles of the abdomen, and with paler legs 



trigonus; Coquillett. 



44. Rather narrower species, with interrupted narrow yellow- 

 ish or greyish median triangles of the abdomen. 

 5. Abdomen rather brownish without blackish lateral 



spots exoticus, Ricardo, 



55. Abdomen rather reddish yellow with the apex black- 

 ish, and with blackish lateral spots ... rufidens, Bigot. 

 555. Abdomen blackish with reddish lateral spots on the 

 second segment and with very narrow yellowish 



segmentations coquillctti, n. n. 



222. Abdomen blackish but at the basal segments reddish yellow 

 or reddish brown, with a continuous yellow median stripe, 



rather small species fidviuiidi/is, Walker, 



2222. Abdomen black, with golden-haired bands, very large species 



chr ysurus, I .oe w. 



III. Abdomen unicolorus or almost so, sometimes darker at the 

 apex. 

 2. Large species, over 20 mm. 



3. Yellowish species pallidiperforatus, Bigot. 



33. Blackish species. 



4. Thorax covered with silvery white pubescence 



candidus, Ricardo, 



44. Thorax covered with yellowish brown pubescence ... 



birmanicits* Bigot. 



22. Small species, less than 20 mm. 



3. Wings quite infuscate .perakiensis, Ricardo. 



33. Wings quite clear formoiiensis, Ricardo. 



