218 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



spur pallid yello\vish; intormeditite tibial spur dusky brownish. 

 Fore wings hyaline with the exception of a large suffused smoky area 

 jbeneath the stigmal vein and apex'of the marginal extending to the 

 caudal wing margin, its distal margin irregular, convexed ; and a long 

 moderately broad strip beneath and against the submarginal vein, its 

 caudal edge straight, running out to the bend of the submarginal 

 vein and there giving out an arm caudo-distad wliich nearly joins 

 a proximal extension of the other sooty area and incloses a more or 

 less ovate, rather large clear spot under the marginal vein (along its 

 proximal half and more). Caudal wings hyaline. Antennae brown; 

 mandibles black at tip. Eyes dark. 



Belongs to the nigra group and of the species resembles noacJd and 

 pulchra. From the former it may be distinguished by reason of the 

 fact that the inner edge of the stigmal vein forms less of a regular 

 concave curve with the inner edge of the marginal vein at apex, the 

 body is much more robust, the posterior wings broader, their marginal 

 cilia distinctly not as long as their greatest width; the proximal 

 tarsal joint of the caudal legs is longer. From pulchra it differs 

 structurally in lacking the discal bristle of the fore wing and in having 

 much broader fore and posterior wings. The mandibles are biden- 

 tate; the bristles of the fore wing venation usual, as in the preceding 

 species; both wings are obtusely pointed; the cephalic tibial spur is 

 many tined beneath; the costal cell bears a single isolated short seta 

 proximad ; marginal cilia of both wings longest at middle, or nearly, 

 of caudal margin; the intermediate tibise are clavate and resemble a 

 barbed club ; the intermediate femora are short and convexly swollen 

 beneath and armed with short spines. 



From a single specimen, §-inch objective, 1-inch optic, Bausch and 

 Lomb. 



Female . — Unkno wn . 



Described from a single male specimen in the collection of the 

 United States Department of Agriculture, mounted on a slide with 

 the type of Acoloides aureus Girault and bearing the following labels : 

 ''248. 1247. Johuaimaja, Feb. '11. C. H. T. March 15, 1910." 



Habitat. — South America — Peru (Johuaimaja). 



Host. — Not known. 



Tifpe. — ^Type No. 14199, U.S.N.M. One male in balsam (mounted 

 with the type female of Acoloides aureus Girault.). 



19. SIGNIPHORA MELANCHOLICA, naw species. 



Normal position. 



Female. — ^Length, 1.15 mm.; large for the genus; body long. 



General color black, tinged mth aeneous ; marked with silvery white 

 thus: A faint narrow band of it across the cephalic margin of the 

 mesoscutum, accented at each side (in balsam most of the band 

 invisible, only the accented portions at each side distinct, appearing 



