18G5.] 275 



a stout tubercle on each side before the middle; venter compressed, 

 blackish, stained with yellowish at base and apex. Length ol lines; 

 expanse of wings Lli lines. 



One specimen. Very distinct from the preceding species, and is at 

 once distinguished by the long acute spine on the scutellum. 



Genus EXETASTES. Grav. 



1. Exetastes niger, n. sp. 



Black, shining; wings fuliginous; legs sometimes reddish. 



Fnnale . — Deep black, head and thorax opaque, closely and finely 

 punctured; antennae longer than the body, slender, especially at tips, 

 entirely piceous-black ; scutellum convex, rather prominent, densely 

 and deeply punctured ; metathorax finely rugose without elevated lines. 

 Wings ample, uniform dark fuliginous, with a violaceous reflection ; 

 nervures and stigma black ; areolet rather large, subtriangular, oblique 

 and subpetiolated. Legs long, rather slender, black, the two anterior 

 pairs more or less honey-yellow, sometimes dusky, the posterior femora 

 sometimes dusky, sometimes stained with rufous, and the apical joints 

 of their tarsi sometimes testaceous. Abdomen subsessile, deep black, 

 smooth and polished, sometimes strongly arcuated, rather slender and 

 depressed at base and broad and subcompressed towards the tip which 

 is truncate ; first segment with a slight prominence on each side of the 

 middle and a slight longitudinal depression on the disk ; ovipositor very 

 short, rufous, valves thickened, blackish, whitish on the inside. Length 

 6 — 6$ lines; expanse of wings 11 — Hi lines. 



Male. — Resembles the female, with the wings not so deeply fuligi- 

 nous, sometimes fuscous and darker along the nervures ; the legs also 

 vary in coloring, one specimen has the four anterior femora, tibiae and 

 tarsi, and the posterior femora, rufous ; the abdomen is not so broad 

 and subcompressed towards the apex; otherwise there seems to be no 

 difference. Length 6 — 7 lines; expanse of wings 11 — 12 lines. 



Two 9 j f° ur £ specimens. 



2. Exetastes flavipennis, n. sp. 



Black, shining: wings deep yellow with the apical margins broadly fuli- 

 ginous. 



Female. — Deep black ; head and thorax subopaque, very closely and 

 finely punctured, rather thinly clothed with short black pubescence; 

 antennae three-fourths the length of the body, slender, piceous; thorax 

 and uietathorax as in the preceding species ; tegulae piceous. Wings 

 rather ample, deep yellowish-hyaline, the apical margins broadly fuli- 

 ginous ; nervures and stigma honey-yellow ; areolet as in the preceding 

 species. Legs black, sometimes tinged with fuscous, the anterior pair 



