DESCRIPTION OF THE SPECIES. 259 



little retreating ; the anterior edge of tlie mouth distinctly projecting in 

 the profile. Eyes elongated. Cheeks somewhat broad, with an infuscated 

 spot near the inferior corner of the eye, and with white pile. Oral 

 opening small, rounded. The rather broad palpi yellowish, beset with 

 whitish pile. The short and not geniculate proboscis dark brown. Thorax 

 shining black, with a metallic lustre in the middle ; upon its lateral 

 border, on each side, there are two large, opaque, velvet black spots, sepa- 

 rated by the origin of the transverse suture, which is tinged with yellow. 

 The usual bristles are black ; the number of pairs which were inserted 

 on the thoracic dorsum cannot well be ascertained. Moreover, the surface 

 of the thoracic dorsum shows remains of stiff, yellowish hairs, which seem 

 to have bordered the broad, bare stripes and to have also been inserted on 

 the posterior part of the broad middle line. Scutellum turgid, shining 

 black, with four bristles. The upper part of the metathorax is black, as 

 in most of the allied species ; the lower portion is covered with white 

 pollen, which does not quite reach its lower margin. Femora with whitish 

 pollen and white hairs ; the humeral corner, as well as a little stripe 

 behind it, near the upper margin, are velvet black. Abdomen shining 

 black ; a thin whitish pollen covers the whole anterior part of the first seg- 

 ment, forms, upon the first, second, and third segments, a band along their 

 posterior margin which is perceptibly expanded and sharply emarginate 

 in the middle ; the posterior margin of the fourth segment has a similar, 

 although narrower, band. The scattered pile on the abdomen is black, 

 gray at its basis, in part yellowish-white upon the last segment. The 

 flat, shining black ovipositor is about as long as the three last abdominal 

 segments taken together, and is beset with delicate, black pile. Feet red- 

 dish-yellow, the middle and hind femora, with the exception of the extreme 

 root and of the tip, brownish-black ; the front femora have a brownish- 

 black stripe upon their upper side. Wings broad, the apex but little 

 rounded, hyaline, somewhat whitish ; at their basis there is a large black 

 spot, reaching into the basal cells ; besides, there are three black cross- 

 bands, entirely coalescent at the anterior margin of the wing and diverg- 

 ing posteriorly; the first of them, which is by far the broadest and is 

 ratber perpendicular, runs from the stigma, over the basis of the discal 

 and of the third posterior cells, towards the posterior margin of the wing; 

 the second band is the narrowest, and runs from the stigma over both 

 crossveins, and hence, obliquely, towards the posterior margin; the third 

 band starts from the stigma and follows the anterior margin and the apex, 

 as far as the tip of the fourth vein, but, nevertheless, remains separated 

 from the costal vein by a narrow, irregular, hyaline interval, which 

 extends almost to its very end ; near the submarginal cell, this interval 

 is a little expanded and includes a punctiform dot, placed near the third 

 vein ; the first and second longitudinal veins are a little more distant from 

 the anterior margin than in most of the related species ; both crossveins 

 are very approximate ; the third longitudinal veiu is beset with short 

 bristles. 



Hab. Brazil (coll. Winthem). 



