66 



H. C. EFFLATOUN. 



DIAGNOSIS: — Length oi' alxlomen more than twiœ its 

 breadth ; abdominal bands very emarginate, or separated iiito trian- 

 gular spots which never reach the side margins. 



DESCRIPTION:— Maie. "Face and frons eovered witb dull 

 "yellow dust, which leaves the central knob sliining and usually 

 "darkened from orange iip to blackish, and downwards from this 

 "the face is ofteii darkened to tlie mouth and the lowest part; the 

 "front of the frons just above the antennœ is also shining, being 

 "luteous betw&en and immediately above the antennse, and blackish 

 "above that; the pubesccnce of the frons is ail black and is also 

 "inconspicuonsly so down the sides of the faoe, but pale yellow on 

 "the lower part of the face, on the jowls and on the back of the 

 "head; on the upper part of the back of the head there are some 

 "longer black hairs overhanging the eyes ; vcrtex shining black 

 "and black haired. Antennse reddish orange with the third joint 

 "black except for a large reddish-orange spot beneath its base ; 

 "arista brown and bare. 



"Thorax very shining eeneous black, humeri and pleurae dull; 

 "pubescence pale brownish to yellow. Scutellum œneous yellow with 

 "longer black pubescence. 



"Abdomen rather dull black but shining at the ti}), narrower 

 "that the thorax and with parallel sides; the secoiul segment with 

 "a pair of fairly large triangular spots running uj) from neur the 

 "lower side-margins towards the middle of the dise and growing 

 "broader as they ascend, but leaving about the middle sixth of the 

 "segment black ; the third segment with a pair of spots (or a band 

 "near the front margin) which do not touch the front or the side- 

 "margins, but are really a pair of large orange spots which are 

 "wider at the sides than at the middle and which are almost ex- 

 "tcnded to the side-margins at their lowest side edge, and sloping 

 "upwards, thence on their lower margin leave just the middle of 

 "the segment ail black ( = var maculicornis), or with the spots 

 "united on their upper part ; the fourth segment has fairly similar 

 "spots and its hind margin is ail orange and united with very 

 "large orange spots at the basai corners of the fifth segment, 

 "which leaves only the triangular middle half of that segment 

 "black. The abdomen is often less orange, especially on the fourth 

 "and fifth segments. Pubescence pale yellow and long about the 

 "base at the basai portion, but ail black after the yellow spots on 

 "the third segment, except toi' a few yellow hairs at the sides 

 "about the base, or on the yellow spots, of the fourth segment. 

 "Genitalia moderate, mostly orange. Legs varying remarkablv from 

 "simply ail pale brownish-yellow with indications of darkcr color- 

 "in" on the third femora, to the hind legs bcing not uncommonly 



