ORTALID^E STENOM ACEA. 181 



bristles are placed, are likewise removed to about the middle of 

 the front and are close* to each other. Antennae descending 

 to the edge of the mouth ; the first two joints yellow ; the 

 third more or less infuscated ; the arista with a very distinct, 

 somewhat rare, pubescence. Face of the Dacus-like shape, 

 peculiar among the Richardina ; proboscis and palpi sometimes 

 of a dirty reddish-yellow, sometimes more brownish-ferruginous. 

 The thoracic dorsum somewhat ferruginous; only very dark 

 specimens have it black ; the hairs upon it are placed in four 

 distinct longitudinal rows, the intermediate ones being very 

 closely approximated. Scntellum convex, with two bristles, black 

 ferruginous on the sides in very pale-colored specimens only. 

 Pleurae, with the exception of the humeral region, as well as the 

 whole metathorax, black. The basis of the abdomen is black to 

 a greater or less extent; in rare specimens only does this color 

 reach the posterior margin of the rather considerably elongated 

 first abdominal segment ; in some specimens, however, this color 

 extends to the very end of the abdomen, or, at least, turns here 

 into blackish-brown. The ovipositor, which is longer than the 

 last three abdominal segments taken together, is usually black 

 or blackish-brown ; its upper side is excavated (at least in dry 

 specimens), and its under side convex, and hence, it is less flat- 

 tened than in the other genera of the Richardina. Coxae pale- 

 yellow. Front feet pale-yellowish ; the tibias towards the basis 

 and the tarsi, beginning from the second joint, infuscated; femora 

 not incrassated, beset with a few, but rather strong, spines on the 

 underside towards its end. The anterior half of the middle femora 

 dark-brown and somewhat incrassated ; the posterior half thin and 

 dark-yellow; the greater part of the under side sparsely spinose ; 

 middle tibiae dark-brown, in most specimens, gradually becoming 

 yellow towards the tip ; tarsi yellowish, brownish towards the 

 tip. Hind femora not incrassated, whitish, the last third brown- 

 ish-yellow, brownish towards the tip ; both shades separated by 

 an oblique brownish-black ring; hind tibiae and tarsi as in the 

 intermediate pair of feet. Wings very much attenuated towards 

 the basis, hyaline ; their anal angle not projecting at all ; from 

 the tip of the costal cell a narrow black streak extends over the 

 incrassated point, where the third longitudinal vein originates 

 and over the crossveins, closing the little cells at the basis of the 

 wing ; the apex of the wing is occupied by a large black spot, 



