ORTALID^— HEM1XANTHA. 191 



the middle of the front ; the bristles on the vertex, the rather 

 distant lateral bristles and the two ocellar bristles comparatively 

 long and strong, blackf Antennae reaching down to the border 

 of the mouth ; the comparatively long third joint sometimes 

 somewhat infuscated at the tip. Arista pubescent. The pubes- 

 cence of the thoracic dorsum is pale-yellowish, the ordinary 

 bristles black. Scutellum of a pure yellow, with four black 

 bristles; its surface rather even. The middle portion of the 

 mesonotum, the lower portion of its sides and the epimera of the 

 metathorax brownish-black. The pubescence of the pleurae yel- 

 lowish. Abdomen elongate-oval, clay-yellow at the extreme 

 basis, the remainder shining steel-blue with violet reflections, 

 more greenish-blue at the posterior end. The first segment of 

 the ovipositor large, shining black, concave above, somewhat 

 convex below. Feet clay-yellow, the basis of the middle tibiae 

 and the hind tibiae brown ; the tip of the tarsi but little infuscated ; 

 femora not incrassate, although rather strong, the four posterior 

 ones longer than the two foremost ones ; the latter with a few 

 small spines near the tip only, the former beset with spines on 

 the whole second half of the under side. Wings almost hyaline, 

 with a yellowish-gray tinge, which is more yellow towards the 

 anterior border; costal cell yellowish-brown; a narrow brownish- 

 black band runs from the humeral crossvein to the axillary 

 incision ; a second one, somewhat broader, runs from the anterior 

 margin over the basis of the submarginal cell and over the end 

 of the small basal cells nearly, but not quite, to the posterior 

 margin of the wing; a third band, inclosing the two remarkably 

 approximate crossveins, extends from the posterior margin to the 

 middle of the submarginal cell ; the apex of the wing bears a 

 large elongate brownish-black spot, beginning before the second 

 longitudinal vein and occupying the border of the wing as far as 

 beyond the fourth vein. The last section of the fourth longitu- 

 dinal vein is parallel to the third vein; the posterior angle of the 

 anal cell is obtuse; the microscopic pubescence of the surface of 

 the wing is remarkably coarse and sparse. 

 Hab. Brazil. 



