Genus Gymnometopa. 209 



own length distant from it ; inner border of the wing curved 

 inwards towards the apex. 



Length.— d' 6 mm. 



Habitat. — Brazil. 



9 . Like the <J but the abdomen broader, the venter with 

 very broad basal brilliant silvery-white bands and narrow black 

 apical ones. First sub-marginal cell considerably longer and a 

 little narrower than the second posterior cell, its base nearer the 

 base of the wing, its stem not quite half the length of the cell, 

 stem of the second posterior nearly two-thirds the length of the 

 cell ; posterior cross- vein nearly twice its own length distant 

 from the mid. 



Halteres with pale brown stem and fuscous knob. 



Legs as in the <J , ungues, equal and simple. 



Length. — 5 mm. 



Time of capture. — October (Dr. Goeldi), November (Dr. Lutz). 



Habitat.— Sao Paulo (Dr. Lutz), Para (Dr. Goeldi). 



Observations. — Described from two $ 's given me under this 

 name by Dr. Lutz, and from a $ and J from Prof. Goeldi. It is 

 a very beautiful species, the white lateral spots showing iridescent 

 mauve in some lights. The marked constrictions and scale tufts 

 on the apices of the segments ventrally are also characteristic. 



Genus GYMNOMETOPA. Coquillett.* 



Proc. Ent. Soc. Wash. VII. No. 4, p. 183 (1906). U.S. Dept. Agri. Bur. 

 Ent. Tech. Sec. No. 11, p. 16 (1906). 



Near Stegomyia, but the clypeus wholly bare. 



Head clothed behind with broad appressed scales except a 

 median stripe of rather narrow ones and narrow forked erect 

 ones. Scutellum bearing both broad and narrow scales. Lateral 

 scales on wing veins narrow. Palpi of $ about as long as 

 proboscis, those of J less than one-third as long. 



The head resembles that of Macleaya, in which genus the 

 scales of the mid lobe of scutellum are flat, on the side lobes 

 narrow curved. 



* This genus founded on sexlineata has been accepted on Coquillett' s 

 description. Time has not been found to examine the type species again. 

 It is probably synonymous with Macleaya. 



VOL. IV. p 



