252 S. W. WILLISTON, M. D. 



contiguous above the large light yellow supra-antennal gibbosity. Antennae 

 brownish red, the third joint transversely suboval ; arista scarcely at all thick- 

 ened at base. Mesonotum more reddish than elsewhere, shining; the remainder 

 of the body nearly uniform reddish yellow, except the larger part of the fourth 

 abdominal segment, and the tifth and sixth wholly deep shining black, the distal 

 end of hind femora, the hind tibia;, and hind tarsi wholly deep opaque black. 

 Hind femora rather stout. Wings hyaline ; from beyond the discal cell very 

 distinctly tinged with blackish; stigma elongate, brown ; origin of second vein 

 remote from small cross- vein. 



One specimen, Chapada. Notwithstanding the stoutness of the 

 femora, I do not place this species under Merosargus. The arista 

 shows scarcely any thickening, and the second vein of the wing is 

 much more remote from the cross-vein than is found either in Mero- 

 sargus or Ptedicus. 



21. Euryneiira nasica n. sp. 



'J, . — Length 4 mm. Black ; face conically produced downward ; antennae 

 slender; wings brown, with a whitish cross-band bent outwards in the middle. 

 Face and frontal triangle black, white pubescent. Antennae not stout, brownish 

 yellow, the style slender, white. Face conically produced downward, longer than 

 the frontal triangle. Mesonotum and scutellum black, covered with fine golden 

 tonientum; margin of scutellum yellowish red, the spines long, yellow, with 

 black tip. Pleurae with silvery white pubescence or pile. Abdomen elongate 

 oval, flattened, wholly black. Wings brown, the immediate base hyaline ; a con- 

 spicuous white cross- band runs from the front margin just beyond the second 

 vein to the posterior margin at the tip of the fourth posterior cell, iu its middle 

 portion strongly bent outward, V-shaped. The wings are more slender, the 

 second vein and the anterior branch of the third vein more oblique than iu the 

 following species. Legs yellow, with the markings simihir in pattern to those 

 of the following species, the middle legs being but slightly infuscated, the front 

 tibiaj and tarsi brown. 



One specimen, Chapada. 



22. Euryiieura elegans n. sp. 



9 . — Length 4 mm. Black ; front, thorax and margin of abdomen light golden 

 tomentose; scutellar spines small; wings variegated. Black; front opaque, 

 sparsely, nearly uniformly golden tomentose, on the lower orbital margin with 

 a narrow silvery border. Face very short, not produced, silvery pubescent. An- 

 teunsB black, the third joint with a reddish cast, iu length only a little more 

 than twice its width. Thorax covered with fine golden tomeutum, which on the 

 sides is anauged to form indefinite slender stripes; mesonotum with two slender 

 bare stripes, nearly contiguous in front, thence gradually diverging to end near 

 the spines of the scutellum. Abdomeu broad, flat, its margin rather broadly, 

 nearly silvery whitish, tomentose. Front femora, at the base below, broadly red ; 

 middle and hind femora reddish yellow, black at the tip above; front tibiie and 

 tarsi wholly black ; middle and hind tibise black, with a median yellow ring ; 

 middle and hind tarsi yellow, with the last two or three joints black. Tlie 

 whitisii cross-baud of the wings begins at the front border, behind the second 



