ORTALID^E STENOMYIA. 113 



Gen. IX. HYPOECTA LOEW. 



Charact. Front of an equal, rather considerable breadth, somewhat pro- 

 jecting when viewed in profile ; delicately hairy on the sides only. 



Antennas, short; third joint very much excised on the upper side, with 

 a very sharp anterior corner and with a thin, bare arista. 



Face not excavated, somewhat retreating on the under side ; clypeus 

 rudimentary, not projecting over the edge of the mouth, of a very 

 small transverse diameter. 



Thorax with bristles on its hind part only ; scutellum convex, with 

 four bristles. 



Wings : posterior angle of the anal cell pointed, open ; the last 

 section of the fourth longitudinal vein converges somewhat towards 

 the third ; the posterior crossvein perpendicular. 



The species of this genus are considerably more slender than 

 the species of Ghsetopsis and their shape is somewhat more like 

 that of Eumetopia. The third antennal joint, the shape of which 

 reminds one of Ceroxys, the not excavated face, the rudimentary 

 clypeus and the open anal cell, are easy to recognize. The 

 ovipositor is conspicuously broad, and so closely joined to the 

 abdomen that it may be easily mistaken for its last segment. 

 The typical species is H. longula Loew, Berl. Ent. Zeitschr. XI, 

 p. 319, Tab. II, f. 23, from Santos (in Brazil). 



No North American species are as yet known. 



Gen. X. STENOMYIA LOEW. 



Charact. Front of equal breadth, somewhat projecting in profile, hairy 

 on the sides ; upon the remaining surface with two longer hairs 

 only. 



Antennas, rather short, third joint hardly excised upon the upper side, 

 but with a sharp anterior angle ; arista thin and bare. 



Face not excavated, somewhat retreating, with a slight depression 

 under each antenna ; gently convex between these depressions ; 

 clypeus of moderate transverse diameter, somewhat projecting over 

 the border of the mouth. 



Thorax with bristles on its posterior part only. 



Wings comparatively long ; posterior angle of the anal cell sharp, but 

 not pointed, last section of the fourth longitudinal vein about double 

 the length of the preceding section, gently converging towards the 

 third longitudinal vein ; posterior crossvein rather perpendicular. 



The striking slenderness of the narrow body and the metallic 

 coloring, are points of resemblance between the species of this 

 genus and those of Eumetopia ; the picture of the wings is like- 



