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U.S. NATIONAL MUSEUM BULLETIN 277 



207. Riekiella longiventris, new species 



Figure 201 



Female. — Head yellow-brown; eyes dark brown; postocular ridge 

 with a raised vertical face behind the eye, to an elevated ridge; back of 

 head black, covered with gray pollen and with short black hairs; 

 frons broad, raised in a central band, covered with a band of short 

 black hairs, lateral margins next to eye depressed, a bare triangle above 

 the antennai bases; mouthparts well developed; ocellar tubercle 

 black-brown, raised from a depressed base, with a few hairs; ocelli 

 dark brown; frons separated from postocular area by grooves that 



Figure 201. — Riekiella longiventris, new species, female: a, wing; ^, lateral aspect of head; 

 c, enlarged detail of antenna; d, enlarged dorsal aspect of head; e, dorsal aspect of 8th 

 and 9th segments;/, ventral aspect of 8th and 9th segments; g, lateral aspect of 8th and 

 9th segments. 



