Eumerus. 



535 



wanting in the middle. Antennæ blackish brown or black, third joint 



small, truncated at the end, somewhat square; arista inserted some- 



what near the base, thickened in the basal part. Thorax æneous or 



dark brassy, densely punctate, a little shining; it 



has two faint, abbreviated, greyish lines and in 



the middle a very narrow line; the two inter- 



stices between the lines are darker; thorax is 



clothed with quite short, yellow hairs. Scutellum 



concolorous with thorax and with the margin 



densely serrated; it has still shorter hairs. Pleura 



æneous, sometimes golden or coppery, with short, 



pale hairs. Abdomen conspicuously reddish, either 



quite or almost quite red, but darkest towards 



the apex, or with the apex more or less darkened 



to black; the black colour may include the fourth 



segment and the hind margin and sides of the 



third; first segment black, sometimes with the hind margin red, and 



second segment may be blackish at the front margin in the middle; 



abdomen is densely punctate, very slightly shining except just at the 



apex; it has three pairs of whitish pruinose, oblique transverse lines 



or very shallow lunules; these lunules run from near the apical corners 



Fig. 176. Head of 

 E. sabulonum d- 



Fig. 177, Antenna of E. sabulonum ^, from the inside. X 70. 



inwards and forwards to above the middle; the pair on second seg- 

 ment do not reach the sides but are here produced somewhat for- 

 wards. Abdomen is clothed with quite short hairs, which are for the 

 greatest part black, but pale on the lunules and also at the sides ex- 

 cept at the front corners of third and fourth segments; the hairs are 

 short also at the sides, only at the basal corners somewhat long, 

 Genitalia black, shining, yellow-haired. Venter coloured as dorsum 

 and with short, pale hairs. Legs black, the anterior knees, a shorter 

 or longer basal part of all tibiæ and the three first joints of anterior 



